JUXT LTD.

Job Description We're looking for Senior and Principal Java Developers with a strong background in low-latency systems to join us on a high-performance trading and real-time data project, for a major financial institution. You'll work on mission-critical applications where performance, scalability, and reliability truly matter - the kind of systems that power global trading platforms and require a deep understanding of how the JVM and Linux really work. This is an opportunity to bring world-class engineering principles to projects at the very heart of modern finance. Your work will focus on writing and tuning high-performance Java frameworks, improving throughput and latency, and applying event-driven, microservice-based architectures. You'll collaborate closely with other talented engineers, helping to shape elegant solutions to complex, performance-sensitive problems. You'll be joining an environment where good software engineering truly matters - where clean design, measurable performance, and deep system understanding are valued. This is an opportunity to work alongside recognised low-latency specialists, elevate your expertise, and contribute to systems that demand precision and technical excellence. We're looking for developers who are technically exceptional, but also pragmatic - engineers who love to understand how things work under the hood, measure performance precisely, and continuously refine their craft. Core skills Strong Java skills with deep knowledge of the JVM Proven experience building or optimising low-latency systems Familiarity with performance tuning and profiling tools (e.g. JMH, async-profiler, Flight Recorder) Solid understanding of multithreading, concurrency, and memory management Experience with microservice architectures and event-driven systems Strong Linux fundamentals and comfort with performance diagnostics Clear communication skills and ability to articulate design and performance decisions Nice to have Experience with high-performance messaging (Chronicle Queue/Wire, Aeron, ZeroMQ, Kafka tuning) Familiarity with off-heap or direct memory structures (Chronicle Map, VarHandles, DirectByteBuffers) Networking/I/O frameworks such as Netty or custom FIX engines Exposure to OpenHFT, LMAX Disruptor, or similar performance-focused frameworks Prior experience in trading, financial markets, or real-time data systems Ability to produce clear, lightweight documentation or UML diagrams when needed WFH? These roles are hybrid - a mix of working from home and on-site collaboration in London, Canary Wharf. Contract type Both permanent and contract arrangements considered. Eligibility We can only consider candidates who have the right to work in the UK and do not require visa sponsorship. Applicants must be UK-based and within a commutable distance to London. Interested? Email with your CV and a brief introduction. Even if you're not sure you tick every box, we'd still love to hear from you - we're always keen to meet passionate, technically curious developers and can keep you in mind for future projects if this one isn't the right fit.

A leading financial technology firm in London is seeking Senior and Principal Java Developers to work on high-performance trading systems. Ideal candidates will possess strong Java skills and experience in low-latency applications. This hybrid role allows for both remote work and on-site collaboration in Canary Wharf. Whether you're building Java frameworks or enhancing performance, you'll contribute to systems that demand technical excellence. Join us to work at the forefront of modern finance.

Job Description We're looking for experienced Golang engineers to join us on a cutting edge platform engineering and AI programme with a global financial leader. You'll be part of a high calibre engineering team building secure, scalable AI platforms. You'll work on Platform Engineering and Internal Developer Platform initiatives that help engineering teams move faster, and on agentic AI tooling that's transforming how we work. This role sits at the intersection of core engineering and emerging AI technology. You'll be helping to shape best practices for how developers use GenAI tools safely and effectively, building secure frameworks and core platform services for use of AI, and deploying LLMs in a private enterprise environment. If you enjoy solving complex problems, learning new technologies, and contributing to high impact technical strategy, you'll feel right at home. Core skills Strong commercial experience with Go - this is essential Deep knowledge of Kubernetes Solid understanding of cloud-native architecture, scaling, SRE and DevOps practices Breadth across core engineering disciplines (infrastructure, architecture frameworks, CI/CD, security, scaling) Curiosity and enthusiasm for agentic and generative AI technologies Nice to have, but not essential Experience in Platform Engineering teams, running technical platforms at scale Knowledge of other languages such as Kotlin, Java, or Python Background in financial services or large-scale engineering environments Experience contributing to open-source or internal frameworks What we offer Work on a high profile, long term programme with a global financial leader. You'll have a significant impact, and a chance to build platform features that you can be proud of. Work in a talented team, learning from exceptional colleagues with a real focus on getting things done. Opportunities for learning and growth, including exposure to the latest AI technologies and practices. Great benefits, including full medical, 10% matched pension and regular premium events. WFH? These roles are hybrid - typically one office day per month, with most work done remotely. You'll need to be UK-based and within a commutable distance to London for occasional on site collaboration. Contract type Permanent only. Eligibility We can only consider candidates who have the right to work in the UK and do not require visa sponsorship. Interested? Email with your CV and a brief introduction. Even if you're not sure you tick every box, we'd still love to hear from you - we're always keen to meet passionate, technically curious developers and can keep you in mind for future projects if this one isn't the right fit.

Job Description We're looking for Full-stack developers at all levels, ranging from Junior (2+ years' experience) to Principal engineers and Architects, to join us as we kick off new projects using Java and React with tier-1 investment banks. You'll work on mission critical systems bringing the best modern AI assisted software engineering to client projects across banking and finance. If you're new to banking, it's also a great way to break into the domain and build deep industry knowledge. This role will include hands on work to bring AI enabled features improvements to new and existing systems, bringing fast builds and feedback, TDD, CI/CD, clean code, automation, and good taste software engineering. Experience with microservice and cloud architecture is beneficial. Our work ranges from greenfield builds on core trading and payments platforms for key areas of the bank, to bringing radical improvements to existing systems, re writing legacy applications, or rescuing struggling projects. What's consistent across all of our work is our commitment to good coding hygiene - best practices, clean design, and building elegant, robust software. This is an excellent environment for junior candidates to learn, and also for seasoned senior engineers to apply everything they know about writing and delivering good software projects. You'll be working day to day with other talented engineers from JUXT and our clients. We're looking for developers who are passionate, enthusiastic, technically curious, and with excellent communication skills. Maybe you mentor others, run or attend meetups, write blogs or record podcasts, contribute to open source, or just like to keep your skills up-to-date. Whatever your background, we value people who care about system design, software craftsmanship, and clear communication. Core skills Strong Java and React skills Good understanding of TDD, XP and Agile principles Exposure to cloud architecture and CI/CD pipelines Experience building large scale systems Engineers with great technical taste who can improve existing projects AI assisted engineering e.g. Copilot, Claude Code, etc. Nice to have Experience building features with LLMs and agents Experience working on high throughput or low latency systems Experience in investment banking, financial services, or fintech Consultancy or client facing experience Knowledge of Terraform, Docker, Kubernetes, and other cloud native infrastructure tools. WFH? These roles are hybrid - a mix of working from home and on site collaboration with clients (Central London or Canary Wharf). Contract type Both permanent and contract arrangements considered. Eligibility We can only consider candidates who have the right to work in the UK and do not require visa sponsorship. Applicants must be UK based and within a commutable distance to London. Interested? Email with your CV and a brief introduction. Even if you're not sure you tick every box, we'd still love to hear from you - we're always keen to meet passionate, technically curious developers and can keep you in mind for future projects if this one isn't the right fit.

Juxt Ltd. is looking for Full-stack developers of all levels in Greater London to work on critical systems for investment banks using Java and React. The role offers both permanent and contract options and is hybrid, permitting a mix of remote working and client collaboration. Ideal candidates will have strong Java and React skills, a good understanding of Agile practices, and a passion for software craftsmanship. Open to junior and senior engineers, applicants should have the right to work in the UK and reside within commuting distance of London.

Juxt Ltd. is looking for a Delivery Manager to enhance their engineering team in banking and finance. This role involves overseeing project delivery, managing engineers, and ensuring client satisfaction. The ideal candidate will be highly organized, adept at Agile methodologies, and possess strong technical skills. The position allows for remote work, with occasional visits to Central London.

A prominent software firm in Greater London is seeking Java developers at all levels to work on innovative projects for tier-1 investment banks. This is a hybrid role, merging remote work with on-site collaboration, allowing developers to improve existing systems while employing modern software engineering practices. Candidates should have strong Java skills and a passion for system design. This opportunity is ideal for developers looking to advance their careers in banking and finance.

A leading technology firm in the UK seeks Kotlin developers for greenfield projects. You'll be part of high-calibre teams delivering strategic rebuilds and modernisation for major financial institutions. Desired candidates will have strong Kotlin skills and problem-solving abilities, with the opportunity to influence architecture and work in a collaborative environment. Hybrid work is available, and applicants must be commutable to London.

Job Description We're looking for Kotlin developers at all levels to join long-term greenfield projects with leading financial institutions in London. You'll be part of small, high-calibre engineering teams delivering strategic rebuilds and modernisation projects, replacing legacy systems with clean, cloud-aligned solutions built on Kotlin and modern engineering practices. These are not maintenance roles - they're about writing great code, solving challenging problems, and shaping architecture from the ground up. You'll be joining teams working on genuinely greenfield, strategic rebuilds with clear scope, autonomy, and modern tech stacks. There's little to no BAU work, and plenty of room to shape architecture, influence direction, and own your contributions end-to-end. This is a great opportunity to deepen your Kotlin expertise, work alongside highly capable engineers, and gain exposure to large-scale systems and distributed architectures within major financial organisations - no prior banking experience required. This is a collaborative, trust-based environment where developers have real autonomy, clear ownership, and meaningful technical input. There's a genuinely friendly culture in the team - people take pride in their craft and support each other to deliver excellent software. Support work is minimal and usually voluntary; if you choose to assist, you'll receive time off in lieu. Core skills Core skills depend on your level of experience, but generally include: Strong Kotlin skills, with depth in modern engineering practices (TDD, clean code, SOLID principles) Demonstrated knowledge and hands-on experience in designing scalable, mission-critical systems Strong understanding of system integration and end-to-end test design principles Ability to work effectively in a collaborative, high-autonomy environment Experience with greenfield builds and/or incremental legacy replacement Strong problem-solving ability and architectural reasoning Hands-on mindset - this is a coding role first and foremost Nice to have Experience with large-scale data processing or distributed query systems (e.g. Spark, Beam, Flink, Trino, Presto, Hive, etc.), or the ability to quickly pick up similar tools Exposure to financial services or enterprise-scale systems WFH? These roles are hybrid, typically 2-3 days per week for team collaboration, with the rest of the time remote. Contract type Permanent employees preferred, but contractor arrangements will also be considered. Eligibility We can only consider candidates who have the right to work in the UK and do not require visa sponsorship. Applicants must be UK-based and within a commutable distance to London. Interested? Email with your CV and a brief introduction. Even if you're not sure you tick every box, we'd still love to hear from you - we're always keen to meet passionate, technically curious developers and can keep you in mind for future projects if this one isn't the right fit.

Job Description We're looking for Java developers at all levels, ranging from Junior (2+ years' experience) to Principal engineers and Architects, to join us as we kick off new Java projects with tier-1 investment banks. You'll work on mission-critical systems bringing the best modern software engineering to client projects across banking and finance. If you're new to banking, it's also a great way to break into the domain and build deep industry knowledge. This role will include hands-on work to bring improvements to new and existing systems, bringing fast builds and feedback, TDD, CI/CD, clean code, automation, and good taste software engineering. Experience with microservice and cloud architecture is beneficial. Our work ranges from greenfield builds on core trading and payments platforms for key areas of the bank, to bringing radical improvements to existing systems, re-writing legacy applications, or rescuing struggling projects. What's consistent across all of our work is our commitment to good coding hygiene - best practices, clean design, and building elegant, robust software. This is an excellent environment for junior candidates to learn, and also for seasoned senior engineers to apply everything they know about writing and delivering good software projects. You'll be working day to day with other talented engineers from JUXT and our clients. We're looking for developers who are passionate, enthusiastic, technically curious, and with excellent communication skills. Maybe you mentor others, run or attend meetups, write blogs or record podcasts, contribute to open source, or just like to stay up-to-date with the latest in Java. Whatever your background, we value people who care about system design, software craftsmanship, and clear communication. Core skills Strong Java skills Good understanding of TDD, XP and Agile principles Exposure to cloud architecture and CI/CD pipelines Experience building large-scale systems Engineers with great technical taste who can improve existing projects AI-assisted engineering e.g. Copilot, Claude Code, etc. Nice to have Experience working on high-throughput or low-latency systems Experience in investment banking, financial services, or fintech Consultancy or client-facing experience Knowledge of Terraform, Docker, Kubernetes, and other cloud-native infrastructure tools. WFH? These roles are hybrid - a mix of working from home and on-site collaboration with clients (Central London or Canary Wharf). Contract type Both permanent and contract arrangements considered. Eligibility We can only consider candidates who have the right to work in the UK and do not require visa sponsorship. Applicants must be UK-based and within a commutable distance to London. Interested? Email with your CV and a brief introduction. Even if you're not sure you tick every box, we'd still love to hear from you - we're always keen to meet passionate, technically curious developers and can keep you in mind for future projects if this one isn't the right fit.