Senior Low Latency Rust Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead application systems analysis and programming activities. The role is to provide senior, low latency systems and application framework engineering (skilled in Java, C++, Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA) team. The team requires a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization is a high skilled enablement group of subject matter experts who produce application frameworks and engage with application engineers to enable application modernisation to over 100 teams across Citi with a concentration on low latency e trading platforms in Markets Technology. This job description provides a high level review of the types of work performed. Other job related duties may be assigned as required. Responsibilities (but not limited to): 90% hands on in the Rust or Java codebase. We build microservices based event sourcing systems on a low latency in house framework. Response times in the 10 microsecond to 100 microsecond range. Lead integration of functions to meet goals, deploy new products, and enhance processes. Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems. Provide world class expertise in Java low latency development. Utilise advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals. Consult with end users to identify system function specifications and incorporate into overall system design. Influence and negotiate with senior leaders and communicate with external parties. Mentor junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated subject matter expert (SME) in applications development. In depth experience with algorithmic trading application development, preferably in a low latency environment. Detailed comprehension and experience with market data handling and associated technologies (such as time series databases e.g. KDB). Demonstrated leadership, project management, and development skills. Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux operating system, system calls and the kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass (e.g. Solarflare OpenOnload). Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects. Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills. Nice to have Background in C++. What we'll provide you 27 days annual leave (plus bank holidays) Discretionary annual performance related bonus Private medical care & life insurance Employee assistance program Pension plan Paid parental leave Special discounts for employees, family, and friends Access to an array of learning and development resources Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity, review Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.
22/06/2026
Full time
Senior Low Latency Rust Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead application systems analysis and programming activities. The role is to provide senior, low latency systems and application framework engineering (skilled in Java, C++, Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA) team. The team requires a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization is a high skilled enablement group of subject matter experts who produce application frameworks and engage with application engineers to enable application modernisation to over 100 teams across Citi with a concentration on low latency e trading platforms in Markets Technology. This job description provides a high level review of the types of work performed. Other job related duties may be assigned as required. Responsibilities (but not limited to): 90% hands on in the Rust or Java codebase. We build microservices based event sourcing systems on a low latency in house framework. Response times in the 10 microsecond to 100 microsecond range. Lead integration of functions to meet goals, deploy new products, and enhance processes. Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems. Provide world class expertise in Java low latency development. Utilise advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals. Consult with end users to identify system function specifications and incorporate into overall system design. Influence and negotiate with senior leaders and communicate with external parties. Mentor junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated subject matter expert (SME) in applications development. In depth experience with algorithmic trading application development, preferably in a low latency environment. Detailed comprehension and experience with market data handling and associated technologies (such as time series databases e.g. KDB). Demonstrated leadership, project management, and development skills. Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux operating system, system calls and the kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass (e.g. Solarflare OpenOnload). Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects. Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills. Nice to have Background in C++. What we'll provide you 27 days annual leave (plus bank holidays) Discretionary annual performance related bonus Private medical care & life insurance Employee assistance program Pension plan Paid parental leave Special discounts for employees, family, and friends Access to an array of learning and development resources Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity, review Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.
Senior Low Latency Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. What We do / The Team This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities. The role is to provide senior, low latency systems and application framework engineering (skilled in Java, C++, Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA) team. The team requires a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization is a high skilled enablement group of subject matter experts who produce application frameworks and engage with application engineers to enable application modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology. Responsibilities (but not limited to) 90% hands in the Java or Rust codebase: building microservices based event sourcing systems on a low latency in house framework. Response times of 10 microseconds to 100 microseconds. Lead integration of functions to meet goals, deploy new products, and enhance processes. Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems. Provide world class expertise in area of Java low latency development. Utilise advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals. Consult with end users to identify system function specifications and incorporate into overall system design. Influence and negotiate with senior leaders and communicate with external parties. Happy to work with and educate and support/mentor junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated SME in area(s) of Applications Development. In depth experience with Algorithmic Trading application development, preferably in a low latency environment. Detailed comprehension and experience with Market Data handling and associated technologies (such as time series databases e.g. KDB). Demonstrated leadership, project management, and development skills. Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux operating system, system calls, and Kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload. Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects. Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills. Nice to have Background in C++. What we'll provide you Competitive base salary (annually reviewed) and 27 days annual leave (plus bank holidays). Discretionary annual performance related bonus. Private Medical Care & Life Insurance. Employee Assistance Program. Pension Plan. Paid parental leave. Special discounts for employees, family, and friends. Access to an array of learning and development resources. This job description provides a high level review of the types of work performed. Other job related duties may be assigned as required. Legal Statements Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.
22/06/2026
Full time
Senior Low Latency Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. What We do / The Team This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities. The role is to provide senior, low latency systems and application framework engineering (skilled in Java, C++, Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA) team. The team requires a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization is a high skilled enablement group of subject matter experts who produce application frameworks and engage with application engineers to enable application modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology. Responsibilities (but not limited to) 90% hands in the Java or Rust codebase: building microservices based event sourcing systems on a low latency in house framework. Response times of 10 microseconds to 100 microseconds. Lead integration of functions to meet goals, deploy new products, and enhance processes. Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems. Provide world class expertise in area of Java low latency development. Utilise advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals. Consult with end users to identify system function specifications and incorporate into overall system design. Influence and negotiate with senior leaders and communicate with external parties. Happy to work with and educate and support/mentor junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated SME in area(s) of Applications Development. In depth experience with Algorithmic Trading application development, preferably in a low latency environment. Detailed comprehension and experience with Market Data handling and associated technologies (such as time series databases e.g. KDB). Demonstrated leadership, project management, and development skills. Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux operating system, system calls, and Kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload. Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects. Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills. Nice to have Background in C++. What we'll provide you Competitive base salary (annually reviewed) and 27 days annual leave (plus bank holidays). Discretionary annual performance related bonus. Private Medical Care & Life Insurance. Employee Assistance Program. Pension Plan. Paid parental leave. Special discounts for employees, family, and friends. Access to an array of learning and development resources. This job description provides a high level review of the types of work performed. Other job related duties may be assigned as required. Legal Statements Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.
Core Engineering Java Development Lead - FX Tech (SVP) Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. This is a hands on role for a Java expert who enjoys building high quality robust and scalable services, shaping technical direction, and working with modern event driven architectures. You'll play a key role in designing, building and evolving core services, working closely with other senior engineers and quants. While you'll have influence over technical decisions, this role is firmly rooted in delivery - ideal for someone who loves writing code, solving complex problems, and continuously raising engineering standards. Responsibilities Hands On Engineering: Designing, developing and maintaining high performance Java services that are scalable, secure and resilient. Modern Backend Design: Applying Domain Driven Design and message /event driven design principles to build loosely coupled, well structured systems. Code Quality & Craftsmanship: Writing clean, maintainable code and contributing to peer reviews, championing best practices and continuous improvement. System Evolution: Helping modernise and evolve existing platforms, balancing pragmatic delivery with long term architectural health. Collaboration: Working closely with trading, quants and fellow engineers to turn complex business requirements into robust technical solutions. Developer Experience: Contributing to improvements in build tooling, CI/CD pipelines, testing approaches and overall engineering productivity. Operational Excellence: Supporting systems in production, improving observability, performance and resilience. Experience Strong Java Expertise: Proven experience building backend systems using Java and frameworks such as Spring with deep understanding of the JVM ecosystem. AI Driven Development Focus: Experience using AI tooling to accelerate design exploration, prototyping and embedding AI capabilities into product workflows and services. Event Driven Design: Experience designing systems using event driven approaches (e.g. Solace, Kafka, Web Sockets or similar technologies), with a solid grounding in Domain Driven Design. Engineering Fundamentals: Strong grasp of SOLID principles, design patterns, dependency injection and persistence technologies. Problem Solving Mindset: Solid knowledge of algorithms and data structures, with the ability to reason about performance, complexity and scalability. Cloud Ready Development: Experience building software for cloud environments, including containerization and modern deployment practices. Quality & Resilience: Understanding of secure coding practices, fault tolerance and building reliable systems in a distributed environment. What we'll provide you Competitive base salary, annually reviewed. 27 days annual leave (plus bank holidays). Discretionary annual performance related bonus. Private medical care and life insurance. Employee assistance program. Pension plan. Paid parental leave. Special discounts for employees, family and friends. Access to learning and development resources. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other protected characteristics. View Citi's EEO policy statement and the Know Your Rights poster. If you have a disability and need reasonable accommodation to use our search tools or apply, please review Accessibility at Citi.
19/06/2026
Full time
Core Engineering Java Development Lead - FX Tech (SVP) Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. This is a hands on role for a Java expert who enjoys building high quality robust and scalable services, shaping technical direction, and working with modern event driven architectures. You'll play a key role in designing, building and evolving core services, working closely with other senior engineers and quants. While you'll have influence over technical decisions, this role is firmly rooted in delivery - ideal for someone who loves writing code, solving complex problems, and continuously raising engineering standards. Responsibilities Hands On Engineering: Designing, developing and maintaining high performance Java services that are scalable, secure and resilient. Modern Backend Design: Applying Domain Driven Design and message /event driven design principles to build loosely coupled, well structured systems. Code Quality & Craftsmanship: Writing clean, maintainable code and contributing to peer reviews, championing best practices and continuous improvement. System Evolution: Helping modernise and evolve existing platforms, balancing pragmatic delivery with long term architectural health. Collaboration: Working closely with trading, quants and fellow engineers to turn complex business requirements into robust technical solutions. Developer Experience: Contributing to improvements in build tooling, CI/CD pipelines, testing approaches and overall engineering productivity. Operational Excellence: Supporting systems in production, improving observability, performance and resilience. Experience Strong Java Expertise: Proven experience building backend systems using Java and frameworks such as Spring with deep understanding of the JVM ecosystem. AI Driven Development Focus: Experience using AI tooling to accelerate design exploration, prototyping and embedding AI capabilities into product workflows and services. Event Driven Design: Experience designing systems using event driven approaches (e.g. Solace, Kafka, Web Sockets or similar technologies), with a solid grounding in Domain Driven Design. Engineering Fundamentals: Strong grasp of SOLID principles, design patterns, dependency injection and persistence technologies. Problem Solving Mindset: Solid knowledge of algorithms and data structures, with the ability to reason about performance, complexity and scalability. Cloud Ready Development: Experience building software for cloud environments, including containerization and modern deployment practices. Quality & Resilience: Understanding of secure coding practices, fault tolerance and building reliable systems in a distributed environment. What we'll provide you Competitive base salary, annually reviewed. 27 days annual leave (plus bank holidays). Discretionary annual performance related bonus. Private medical care and life insurance. Employee assistance program. Pension plan. Paid parental leave. Special discounts for employees, family and friends. Access to learning and development resources. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to race, colour, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status or other protected characteristics. View Citi's EEO policy statement and the Know Your Rights poster. If you have a disability and need reasonable accommodation to use our search tools or apply, please review Accessibility at Citi.
Senior Low Latency Rust Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. What We do / The Team This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities. The role is to provide senior, low-latency systems and application framework engineering (skilled in Java, C++ , Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA ) team. The team require a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization are a high skilled enablement group of Subject Matter experts - who produce application frameworks and engage with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology. Responsibilities include (but not limited to): 90% hands on in the Rust or Java codebase. We build microservices based event sourcing systems on a low latency in house framework. Response times in the 10 microsecond to 100 microsecond range. Lead integration of functions to meet goals, deploy new products, and enhance processes Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems Provide world class expertise in area of Java low latency development. Utilize advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals Consult with end users to identify system function specifications and incorporate into overall system design Influence and negotiate with senior leaders and communicate with external parties Happy to work with and educate and support/mentor Junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development In-depth experience with Algorithmic Trading application development, preferably in low latency environment Detailed comprehension and experience with Market Data handling and associated technologies (such as time-series databases e.g. KDB) Demonstrated leadership, project management, and development skills Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux Operating system, system calls and Kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills Nice to have Background in C++ This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. What we'll provide you By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resources Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review. Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.
18/06/2026
Full time
Senior Low Latency Rust Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. What We do / The Team This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities. The role is to provide senior, low-latency systems and application framework engineering (skilled in Java, C++ , Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA ) team. The team require a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization are a high skilled enablement group of Subject Matter experts - who produce application frameworks and engage with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology. Responsibilities include (but not limited to): 90% hands on in the Rust or Java codebase. We build microservices based event sourcing systems on a low latency in house framework. Response times in the 10 microsecond to 100 microsecond range. Lead integration of functions to meet goals, deploy new products, and enhance processes Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems Provide world class expertise in area of Java low latency development. Utilize advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals Consult with end users to identify system function specifications and incorporate into overall system design Influence and negotiate with senior leaders and communicate with external parties Happy to work with and educate and support/mentor Junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development In-depth experience with Algorithmic Trading application development, preferably in low latency environment Detailed comprehension and experience with Market Data handling and associated technologies (such as time-series databases e.g. KDB) Demonstrated leadership, project management, and development skills Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux Operating system, system calls and Kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills Nice to have Background in C++ This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. What we'll provide you By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resources Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review. Accessibility at Citi. View Citi's EEO Policy Statement and the Know Your Rights poster.
Citibank (Switzerland) AG in Greater London seeks a Senior Low Latency Rust Engineer to lead applications systems analysis and programming in the high-performance architectures team. This role demands significant experience in low latency algorithmic trading and Java development. Responsibilities include building event sourcing microservices, mentoring junior developers, and liaising with senior leaders. The position offers a hybrid working model and benefits including 27 days of annual leave. Join a team redefining global finance.
15/06/2026
Full time
Citibank (Switzerland) AG in Greater London seeks a Senior Low Latency Rust Engineer to lead applications systems analysis and programming in the high-performance architectures team. This role demands significant experience in low latency algorithmic trading and Java development. Responsibilities include building event sourcing microservices, mentoring junior developers, and liaising with senior leaders. The position offers a hybrid working model and benefits including 27 days of annual leave. Join a team redefining global finance.
For additional information, please review . Senior Low Latency Rust Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. What We do / The Team This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities.The role is to provide senior, low-latency systems and application framework engineering (skilled in Java, C++ , Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA ) team. The team require a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization are a high skilled enablement group of Subject Matter experts - who produce application frameworks and engage with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology. Responsibilities include (but not limited to): 90% hands-on in the Rust or Java codebase. We build microservices based event sourcing systems on a low latency in-house framework. Response times in the 10 microsecond to 100 microsecond range. Lead integration of functions to meet goals, deploy new products, and enhance processes Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems Provide world class expertise in area of Java low latency development. Utilize advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals Consult with end users to identify system function specifications and incorporate into overall system design Influence and negotiate with senior leaders and communicate with external parties Happy to work with and educate and support/mentor Junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development In-depth experience with Algorithmic Trading application development, preferably in low latency environment Detailed comprehension and experience with Market Data handling and associated technologies (such as time-series databases e.g. KDB) Demonstrated leadership, project management, and development skills Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux Operating system, system calls and Kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills Nice to have Background in C++This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. What we'll provide you By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resourcesAlongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. Job Family Group: Technology Job Family: Applications Development Time Type: Full time Most Relevant Skills Please see the requirements listed above. Other Relevant Skills For complementary skills, please see above and/or contact the recruiter. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review . View Citi's and the poster.
15/06/2026
Full time
For additional information, please review . Senior Low Latency Rust Engineer Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. What We do / The Team This is a senior level position responsible for establishing and implementing new or revised application systems and programs in coordination with the Technology Team. The overall objective of this role is to lead applications systems analysis and programming activities.The role is to provide senior, low-latency systems and application framework engineering (skilled in Java, C++ , Rust, KDB, market data, algorithmic trading technology) within the London Based High Performance Architectures (HPA ) team. The team require a specialist on algorithmic trading systems utilities including but not limited to market data replay and back test/simulation utilities. The HPA organization are a high skilled enablement group of Subject Matter experts - who produce application frameworks and engage with application engineers to enable application Modernisation to over 100 teams across Citi with a concentration on low latency eTrading platforms in Markets Technology. Responsibilities include (but not limited to): 90% hands-on in the Rust or Java codebase. We build microservices based event sourcing systems on a low latency in-house framework. Response times in the 10 microsecond to 100 microsecond range. Lead integration of functions to meet goals, deploy new products, and enhance processes Analyse complex business processes, system processes, and industry standards to define and develop solutions to high level problems Provide world class expertise in area of Java low latency development. Utilize advanced knowledge of supported main system flows and comprehensive knowledge of multiple areas to achieve technology goals Consult with end users to identify system function specifications and incorporate into overall system design Influence and negotiate with senior leaders and communicate with external parties Happy to work with and educate and support/mentor Junior developers and less experienced senior Java developers. Key Skills and Experience required Demonstrated Subject Matter Expert (SME) in area(s) of Applications Development In-depth experience with Algorithmic Trading application development, preferably in low latency environment Detailed comprehension and experience with Market Data handling and associated technologies (such as time-series databases e.g. KDB) Demonstrated leadership, project management, and development skills Passion for coding excellent, commercial grade, mission critical Java frameworks based on event sourcing microservices. Complete knowledge of modern Java, the JVM, the Linux Operating system, system calls and Kernel. Knowledge of TCP and other IP based network protocol technologies including hardware accelerated kernel bypass e.g. Solarflare OpenOnload Performance assessment and targeted tuning. Design and architectural elegance. Experience in implementing projects Great communicator with high EQ. Ability to occasionally produce clear diagrammatic documentation and model key aspects in UML sequence diagrams. Relationship and consensus building skills Nice to have Background in C++This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required. What we'll provide you By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resourcesAlongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive. Job Family Group: Technology Job Family: Applications Development Time Type: Full time Most Relevant Skills Please see the requirements listed above. Other Relevant Skills For complementary skills, please see above and/or contact the recruiter. Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law. If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review . View Citi's and the poster.
Core Engineering Java Development Lead - FX Tech (SVP)Applylocations: London United Kingdomtime type: Full timeposted on: Posted Todayjob requisition id: Core Engineering Java Development Lead - FX Tech (SVP) Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.This is a hands-on role for a Java expert who enjoys building high-quality robust and scalable services, shaping technical direction, and working with modern event-driven architectures. You'll play a key role in designing, building and evolving core services, working closely with other senior engineers and quants. While you'll have influence over technical decisions, this role is firmly rooted in delivery - ideal for someone who loves writing code, solving complex problems, and continuously raising engineering standards. Responsibilities: Hands-On Engineering: Designing, developing and maintaining high-performance Java services that are scalable, secure and resilient. Modern Backend Design: Applying Domain-Driven Design and message-/event-driven design principles to build loosely coupled, well-structured systems. Code Quality & Craftsmanship: Writing clean, maintainable code and contributing to peer reviews, championing best practices and continuous improvement. System Evolution: Helping modernise and evolve existing platforms, balancing pragmatic delivery with long-term architectural health. Collaboration: Working closely with trading, quants and fellow engineers to turn complex business requirements into robust technical solutions. Developer Experience: Contributing to improvements in build tooling, CI/CD pipelines, testing approaches and overall engineering productivity. Operational Excellence: Supporting systems in production, improving observability, performance and resilience. Experience: Strong Java Expertise: Proven experience building backend systems using Java and frameworks such as Spring with deep understanding of the JVM ecosystem. AI Driven Development Focus: experience using AI tooling to accelerate design exploration, prototyping and embedding AI capabilities into product workflows and services Event Driven Design: Experience designing systems using event-driven approaches (e.g. Solace, Kafka, Web Sockets or similar technologies), with a solid grounding in Domain-Driven Design. Engineering Fundamentals: Strong grasp of SOLID principles, design patterns, dependency injection and persistence technologies Problem-Solving Mindset: Solid knowledge of algorithms and data structures, with the ability to reason about performance, complexity and scalability Cloud-Ready Development: Experience building software for cloud environments, including containerization and modern deployment practices. Quality & Resilience: Understanding of secure coding practices, fault tolerance and building reliable systems in distributed environment What we'll provide you By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resourcesVisit our About Us Culture, Values & Benefits page to learn more.Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.
04/06/2026
Full time
Core Engineering Java Development Lead - FX Tech (SVP)Applylocations: London United Kingdomtime type: Full timeposted on: Posted Todayjob requisition id: Core Engineering Java Development Lead - FX Tech (SVP) Engineer the future of global finance. At Citi, our Tech team doesn't just support finance - we are helping to redefine it. Every day, $5 trillion crosses through our network. We do business in 180+ countries operating at a scale few can match. From deploying advanced AI to helping shape global markets, we build systems that matter. Look to join a team where your work helps influence economies, your ideas can drive innovation and outcomes, and your growth is backed by mentorship, continuous learning and flexibility with potential hybrid work opportunities. Help solve real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech.This is a hands-on role for a Java expert who enjoys building high-quality robust and scalable services, shaping technical direction, and working with modern event-driven architectures. You'll play a key role in designing, building and evolving core services, working closely with other senior engineers and quants. While you'll have influence over technical decisions, this role is firmly rooted in delivery - ideal for someone who loves writing code, solving complex problems, and continuously raising engineering standards. Responsibilities: Hands-On Engineering: Designing, developing and maintaining high-performance Java services that are scalable, secure and resilient. Modern Backend Design: Applying Domain-Driven Design and message-/event-driven design principles to build loosely coupled, well-structured systems. Code Quality & Craftsmanship: Writing clean, maintainable code and contributing to peer reviews, championing best practices and continuous improvement. System Evolution: Helping modernise and evolve existing platforms, balancing pragmatic delivery with long-term architectural health. Collaboration: Working closely with trading, quants and fellow engineers to turn complex business requirements into robust technical solutions. Developer Experience: Contributing to improvements in build tooling, CI/CD pipelines, testing approaches and overall engineering productivity. Operational Excellence: Supporting systems in production, improving observability, performance and resilience. Experience: Strong Java Expertise: Proven experience building backend systems using Java and frameworks such as Spring with deep understanding of the JVM ecosystem. AI Driven Development Focus: experience using AI tooling to accelerate design exploration, prototyping and embedding AI capabilities into product workflows and services Event Driven Design: Experience designing systems using event-driven approaches (e.g. Solace, Kafka, Web Sockets or similar technologies), with a solid grounding in Domain-Driven Design. Engineering Fundamentals: Strong grasp of SOLID principles, design patterns, dependency injection and persistence technologies Problem-Solving Mindset: Solid knowledge of algorithms and data structures, with the ability to reason about performance, complexity and scalability Cloud-Ready Development: Experience building software for cloud environments, including containerization and modern deployment practices. Quality & Resilience: Understanding of secure coding practices, fault tolerance and building reliable systems in distributed environment What we'll provide you By joining Citi, you will not only be part of a business casual workplace with a hybrid working model (up to 2 days working at home per week), but also receive a competitive base salary (which is annually reviewed), and enjoy a whole host of additional benefits such as: 27 days annual leave (plus bank holidays) A discretional annual performance related bonus Private Medical Care & Life Insurance Employee Assistance Program Pension Plan Paid Parental Leave Special discounts for employees, family, and friends Access to an array of learning and development resourcesVisit our About Us Culture, Values & Benefits page to learn more.Alongside these benefits Citi is committed to ensuring our workplace is where everyone feels comfortable coming to work as their whole self, every day. We want the best talent around the world to be energized to join us, motivated to stay and empowered to thrive.
