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A progressive tech company in Greater London is looking for a Junior-Mid DevX Engineer. You will build and maintain internal tools for engineering teams, enhance CI/CD pipelines, and support developer workflows. Successful candidates will have experience in CI/CD, Linux environments, and a backend language. The position offers a remote-first work culture, flexible hours, and significant investment in personal development and well-being.

The Role We are looking for a Backend QA Engineer to help ensure the reliability, performance, and scalability of our backend systems. In this role, they will focus on testing APIs, databases, and backend services while collaborating closely with engineers to maintain high quality standards across our infrastructure. This is a fully onsite position, based in Lisbon, where you will collaborate closely with cross functional teams in person and contribute to a dynamic and fast paced environment. We are open to support with relocation efforts. The ideal candidate has approximately 2-3 years of experience working with backend technologies such as Node.js and TypeScript and enjoys combining software development practices with quality assurance. They will contribute to test design, automation, API validation, and infrastructure review while helping maintain a strong quality culture within the engineering team. Responsibilities Design and execute tests for backend systems, including APIs, databases, and service integrations. Validate API functionality and performance using tools such as Postman, Swagger, or similar platforms. Test and verify database operations, queries, and data integrity in systems using PostgreSQL or similar relational databases. Collaborate with engineering teams to review pull requests, ensuring code quality and test coverage. Support the development and maintenance of automated tests for backend services. Participate in reviewing backend infrastructure and identifying potential reliability or performance issues. Document and track defects, test cases, and test results using test management tools such as TestRail or similar systems. Work closely with developers and product teams to improve testing strategies and overall product quality. Requirements Approximately 2-3 years of experience working with backend technologies, testing, or software development in test roles. Experience with Node.js and TypeScript in backend environments. Familiarity with SQL databases, particularly PostgreSQL, and experience validating database queries and data integrity. Experience testing REST APIs using tools such as Postman, Swagger, or similar API testing tools. Understanding of backend testing practices, including API testing, database testing, and integration testing. Familiarity with test management tools such as TestRail or comparable platforms is beneficial. Comfort reviewing pull requests and backend architecture changes to help ensure quality standards. Strong attention to detail, problem solving skills, and the ability to collaborate with cross functional teams. Why Join Air Apps? (Lisbon) Annual Bonus Top tier Health and Life Insurance for peace of mind. Transportation Budget to support your commute needs. Coverflex benefits package for meal allowances, well being, and more. Urban Sports Club membership to keep you active. Meals 100% free at the office. Pension Fund to support your long term financial planning. Annual Conference: an opportunity to meet the team, collaborate, and grow together. Apple hardware ecosystem for work. Diversity & Inclusion At Air Apps, we are committed to fostering a diverse, inclusive, and equitable workplace. We enthusiastically welcome applicants from all backgrounds, experiences, and perspectives. We celebrate diversity in all its forms and believe that varied voices and experiences make us stronger.

About Air Apps At Air Apps, we believe in thinking bigger-and moving faster. We're a family-founded company on a mission to create the world's first AI-powered Personal & Entrepreneurial Resource Planner (PRP), and we need your passion and ambition to help us change how people plan, work, and live. Born in Lisbon, Portugal in 2018-and now with offices in both Lisbon and San Francisco-we've remained self-funded while reaching over 100 million downloads worldwide. Our long-term focus drives us to challenge the status quo every day, pushing the boundaries of AI-driven solutions that truly make a difference. Here, you'll be a creative force, shaping products that empower people across the globe. Join us on this journey to redefine resource management-and change lives along the way. The Role As a Backend Software Engineer, you will be responsible for designing, building, and maintaining the server-side components of our applications. You will collaborate closely with product managers, frontend developers, and other cross-functional teams to deliver robust and scalable backend services that power critical features and support rapid growth. This is a fully onsite position, based at our office in Lisbon, where you will collaborate closely with cross-functional teams in person and contribute to a dynamic and fast-paced environment. We are open to support with relocation efforts. Responsibilities API & Service Architecture - Design and build RESTful or GraphQL APIs, microservices, and business logic using Node.js and TypeScript. Database Design & Integration - Model data and manage queries using Supabase and PostgreSQL, including functions, row-level security, and real-time features. Cloud Infrastructure - Deploy and manage services on Google Cloud Platform (GCP), particularly with Cloud Run, Cloud Functions, IAM, and Pub/Sub. Code Quality & Testing - Write clean, testable code using unit, integration, and end-to-end testing frameworks (e.g., Jest). Contribute to code reviews and quality assurance practices. Security & Reliability - Implement secure-by-default solutions for authentication, authorization, and data protection, following Clean Code and Clean Architecture principles. Monitoring & Operations - Set up logging, monitoring, and alerting for backend services. Own incident response and uptime improvements. Team Collaboration - Participate in architecture discussions, mentor team members, and document your decisions and systems for internal knowledge sharing. Requirements 5+ years in backend engineering roles; Proficiency in Node.js and TypeScript; Strong experience with Supabase or equivalent PostgreSQL-based backend services; Hands-on experience with cloud platforms (e.g., GCP, AWS, Azure), including deploying and managing services using serverless compute (e.g., Cloud Run, AWS Lambda, Azure Functions); Solid knowledge of Clean Code and Clean Architecture practices; Experience with API design (REST) and cloud-native application development; Familiarity with CI/CD pipelines, testing tools, and Git workflows; Strong grasp of security principles, data protection, and compliance best practices; Effective communicator and proactive team contributor; What benefits are we offering? Apple hardware ecosystem for work. Annual Bonus Top-tier Health and Life Insurance for peace of mind. Transportation Budget to support your commute needs. Coverflex benefits package for meal allowances, well-being, and more. Childcare support. Air Conference - an opportunity to meet the team, collaborate, and grow together. Pension Fund to support your long-term financial planning. Urban Sports Club membership to keep you active. Meals 100% free at the hub. Diversity & Inclusion At Air Apps, we are committed to fostering a diverse, inclusive, and equitable workplace. We enthusiastically welcome applicants from all backgrounds, experiences, and perspectives. We celebrate diversity in all its forms and believe that varied voices and experiences make us stronger. Application Disclaimer At Air Apps, we value transparency and integrity in our hiring process. Applicants must submit their own work without any AI-generated assistance. Any use of AI in application materials, assessments, or interviews will result in disqualification.

Java Developer - Permanent - Abingdon, Oxfordshire Hybrid - 3 days on site, 2 days remote Minimum Qualifications Strong knowledge of Java Core, including: Collections Framework, Generics, Streams, Lambdas Exception handling & best practices Multithreading & concurrency (Executors, synchronization, CompletableFuture) Memory management & garbage collection basics Object-oriented principles (SOLID, design patterns, microservice architecture) Experience with Java & related frameworks (SpringBoot, Eclipse RCP, OData, Hibernate, JPA, REST, etc.) Backend development including REST APIs with Spring Boot, Swagger/OpenAPI specifications, Spring Security, OAuth2/OIDC, JWT. Git-based workflows & Gitlab CI/CD pipelines. Experience working in an Agile development environment (Scrum or Kanban). Familiarity with SQL Server, PostgreSQL or other relational databases. Self-starter with a proactive attitude & ability to learn new technologies quickly. Undergraduate degree in Software Engineering, Computer Science, or a related field. Java Developer preferred Qualifications GIS connectors. Azure DevOps, GitLab, & Git-based workflows. Experience with CI/CD pipeline automation & deployment Scripting. Automated testing, including unit, integration, & regression testing. Eclipse Plugin development experience including SWT, JFace, Eclipse OSGi, extension points, views/editors, preferences. Knowledge of containerization & orchestration (Docker, Kubernetes). Java Developer key responsibilities Design, develop, & maintain desktop & web applications using Java. Implement new services, features, & bug fixes as prioritized by the Product Owner. Build & integrate APIs to enable seamless communication between services & components. Collaborate with product owners, architects, & other developers to define requirements & deliver high-quality solutions. Participate actively in Agile ceremonies including sprint planning, daily stand-ups, backlog refinement, & retrospectives. Write clean, maintainable, & well-documented code following industry best practices & internal standards. Implement automated tests (unit, integration, & functional) to ensure code quality & reliability. Monitor & optimize performance, scalability, & security. Apply & enforce security best practices, including: Ensuring secure authentication & authorization flows. Implementing encryption for data in transit & at rest. Validating & sanitizing all inputs to prevent injection attacks. Keeping dependencies & libraries up to date to mitigate vulnerabilities. Troubleshoot & resolve issues across development, staging, & production environments. Maintain up-to-date knowledge of emerging technologies, frameworks, & industry trends relevant to day-to-day development. Contribute to technical documentation & knowledge sharing across teams. Communicate & escalate issues clearly & promptly to relevant stakeholders. With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining and Manufacturing sectors worldwide. With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients.

Java Script Works is seeking a Senior Full Stack Developer in London, United Kingdom. In this role, you'll contribute to the evolution of a bespoke loan and lease management platform, working with Python/Django for the back end and Next.js/React/TypeScript for the front end. The position is full-time with a competitive compensation package offered. If you have a strong background in both frontend and backend development, this is an exciting opportunity to make an impact.

Requirements: I am looking for candidates with a demonstrated track record of developing and delivering mobile applications, ideally using React Native. A high level of proficiency in TypeScript and JavaScript is essential, with a focus on clean, maintainable code. Hands-on experience building backend services with Node.js is required. It is important that you have knowledge of contemporary frontend and backend frameworks, and the ability to adapt to

We're looking for a Frontend Software Engineer, with strong Typescript and React/NextJS experience, to join our US loans team. This is a cross-functional team tasked with delivering new features and technical refinements on one of our fastest growing products, Unsecured Loans, tackling the toughest and most dynamic credit market in the world, the United States. There's lots to do, from building out new user journeys and optimising conversion rates in our existing funnels, and answering questions with experiments and fast iteration, to maintaining, refactoring & improving our codebase and tooling. Our ideal engineer is proactive, product-oriented, detail focused and resourceful, keen to understand the bigger picture outside of their product team and working at pace, contributing to wider engineering and business initiatives that help us further scale our products as we continue to grow. What we're looking for Essential: 3+ years experience. Reside in Europe or the UK. Strong knowledge of modern Javascript with Typescript and React.js. Commercial experience with the latest versions of NextJS. Good understanding of automated testing in software development, and take a pragmatic approach to implementing and improving the various phases of the testing pyramid. Able to identify and assess technical debt and are a vocal advocate for prioritising code improvements alongside feature work whenever the opportunity arises. Solid understanding of the importance of catering to users with accessibility needs, and familiarity with approaches and tooling required to ensure accessibility guidelines and best practices are adhered to. Proactive in taking ownership over your work and collaborating with product, ensuring progress by communicating blockers, seeking feedback, and driving tasks to completion. Comfortable working with product owners and senior engineers to identify the difficulties of implementing a feature from an initial design wireframe or outline spec and are not afraid to put forward alternative approaches where you feel it appropriate. Desirable Experience working at a Fintech or startup/scaleup environment. Experience working on financial systems. A keen desire to want to learn and input into a highly collaborative team. What would make you stand out You have experience working on multi-product web applications in a monorepo environment (we use Turborepo). You have worked with modern React functionality such as Server Components, and the NextJS app folder, and have a good understanding of how you would approach a migration toward this new architecture. You've worked with OpenAPI/Swagger specifications to help define API requirements and contracts, collaborating with backend developers to agree on best approaches when scoping work that requires new and updated schemas. You have demonstrable experience with web performance best practices and debugging. You've employed staged rollouts and multivariate testing approaches to release new features and test hypotheses. You have experience of UI or UX design. You feel at ease discussing design decisions with product managers and designers, and are happy to get involved in putting forward ideas when required. Our tech stack Web: Typescript, React, NextJS, Redux Toolkit, SCSS Modules, React Testing Library, Cypress/Playwright, Turborepo Backend / Infrastructure: PHP 8 (Symfony), Kotlin, MySQL, RabbitMQ, AWS, Docker, Kubernetes Tooling: ArgoCD and Github Actions Github, Jira & Confluence, for our code & product management processes Datadog & Sentry, for debugging and reporting Figma, for our design process Life at Lendable Winning team: the opportunity to scale up one of the world's most successful fintech companies Flexible working: flexible approach tailored to each role. Hybrid roles require three days in-office weekly; fully remote roles include regular opportunities for in-person connection through socials and off-sites Socials & connection: opportunities and events to come together, socialise, and get to know each other beyond the office walls Health coverage: support for your physical and mental wellbeing, including private health cover Retirement & savings: long-term financial wellbeing through retirement savings plans Employee referral programme: earn a competitive bonus when you refer successful new team members Office meals & snacks: enjoy a fully stocked kitchen, plus complimentary lunches prepared by in-house chefs on in-office days at select locations Sustainable commuting: cycle-to-work and electric vehicle salary sacrifice schemes available in select locations Please note: The availability and details of specific benefits vary by location and role. For more information, please speak to your Talent Partner.

Full Stack Developer (Edge) Department: Engineering Employment Type: Permanent - Full Time Location: Bristol, UK Reporting To: Stephen Pope Description We're building the UK's next generation engineering powerhouse, providing critical technology that strengthens national security and resilience. We specialise in turning advances in sensing, AI, and communications into operational capability for the edge, where connectivity may be degraded or denied. Our work focuses on accelerating the deployment of technology, improving decision-making for frontline teams, and protecting people and critical assets in demanding environments. Headquartered in Bristol, Rowden employs around 160 people and operates over 20,000 square feet of engineering and manufacturing facilities. We have a growing international footprint and are one of Europe's fastest-growing engineering businesses. About the role We're looking for a Full Stack Developer to build software across our edge platform, from services running on constrained devices in the field, through the control plane that manages them, to the interfaces operators use to monitor and control systems. This is full stack development in environments where normal assumptions do not hold. Connectivity is unreliable. Memory and compute are limited. Systems disappear for days and come back unexpectedly. The work involves building APIs that fail gracefully, interfaces that remain usable with delayed telemetry, pipelines that can pause and recover, and services that continue working after long periods offline. You'll work across different parts of the stack and follow problems wherever they lead. Some days that will mean backend services or orchestration systems. Other days it will mean frontend tooling, deployment workflows, or debugging behaviour on edge devices. The work is technical, practical, and important. You'll build systems used by people operating in demanding environments where reliability matters. You'll see how your software performs in real conditions and learn quickly which design decisions worked, and which did not. We do not expect you to know every part of the stack from day one. We're looking for someone curious, adaptable, and comfortable working through difficult engineering problems in unfamiliar areas. This role offers hybrid working with a minimum of 3 days per week on-site at our Bristol HQ. Candidates must be eligible for SC clearance. More information about security clearance is available here: Key areas of responsibility Building services that run on edge nodes: lightweight, event-driven, and resilient to intermittent connectivity, with careful attention to memory, CPU, and storage budgets. Building control-plane services that coordinate fleets of devices, manage configuration and state, and integrate with backend data and analytics systems. Building operator-facing web interfaces for monitoring, control, and decision support, including UIs that remain usable when underlying data is stale or partial. Designing and implementing APIs that work well over intermittent connections: idempotent, versioned, tolerant of partial connectivity, and clear about state. Wiring up streaming and messaging pipelines between edge and core, choosing the right protocol and the right semantics for each link. Integrating with sensors, payloads, and hardware-connected systems, often through unconventional protocols and constraints. Contributing to test coverage, CI/CD, and shared engineering practices that keep delivery fast and the codebase healthy. Working directly with users to validate that what you've built actually solves the operational problem in front of them. Key skills, experience and behaviours We are looking for someone who is passionate about technology and who actively invests in their technical skills. You'll be constantly learning in this role, but some key skills and experience you should already have include: Essential Strong full-stack experience: comfortable building production frontends (React or similar, TypeScript) and production backend services (Go, Python, Node.js, or similar). Solid API design experience, both REST and event-driven, with an understanding of where each fits. Practical experience with message brokers, streaming, or pub/sub systems (MQTT, NATS, Kafka, or similar). Experience working with containers and deploying into orchestrated environments. Comfortable on Linux: navigating systems, debugging across the stack, reading logs that nobody curated for you. Sound software engineering fundamentals: clean code, automated testing, and a feel for when to optimise and when to leave it alone. Awareness of secure software development practices and a proactive approach to identifying and mitigating risks. Experience building software that handles sensitive data or operates in security-conscious environments. Desirable (not essential) Experience building software for constrained or embedded targets (Raspberry Pi class, single-board computers, IoT, ruggedised hardware). Experience with offline-first or intermittently-connected applications, including conflict resolution and reconciliation. Familiarity with edge-style stacks: container orchestration at the edge, lightweight messaging, time-series data, telemetry. Experience in regulated sectors delivering complex connected systems, such as defence, national security, telecommunications, financial services, or automotive industries. About you Curious and adaptable: Our work crosses domains and you should be comfortable picking up new technologies, languages, and problem spaces. Ownership: You finish what you start and you care about the user. Pragmatic: You choose solutions that work in practice, and you know when to use the standard tool and when the problem genuinely needs something different. Collaborative: You share knowledge generously and you're happy to step into someone else's part of the stack when it helps. Resilient: You're comfortable in a fast-paced environment where requirements evolve as we learn more about the operational problem. Quality-driven: You take pride in building software that holds up, particularly in environments where retrying is not free. Working at Rowden We are committed to building a flexible, inclusive, and enabling company. Our aim is to create a diverse team of talented people with unique skills, experience, and backgrounds, so please apply and come as you are! We also recognise the importance of flexible working and support this wherever we can. We typically operate a flexible, hybrid-working model, with an average 3 days in the office each week (dependent on the role). We welcome the opportunity to discuss flexibility, part-time working requirements and/or workplace adjustments with all our applicants. Rowden is a Disability Confident Committed company, and we actively encourage people with disabilities and health conditions to apply for our roles. Please let us know your requirements early on so that we can make sure you have everything you need up front to help make the recruitment process and experience as easy as possible. Finally, if you feel that you don't meet all the criteria included above but have transferable skills and relevant experience, we'd still love to hear from you!

United States Digital Space LLC is seeking a Java Full Stack Developer based in Greater London. You will design, develop, and enhance scalable workflow solutions using a modern tech stack, working with Java-based backend services and Angular/React for the frontend. Your role will involve building RESTful services, collaborating on UI/UX designs, and ensuring high performance and reliability of applications. The position supports inclusive recruitment as a Disability Confident Employer.

About the role As a backend development Engineer, you'll be working in an agile team of industry leading engineers to define and develop Tesco's xAPI (Experience API) that powers Tesco's various shopping experiences i.e., the mobile shop application, store and other internal facing applications. You'll be a passionate, pragmatic Engineer with an inquisitive mind who is motivated to make change for the better and most importantly put our customer first. You'll enjoy working as part of a team, liaise with product and program managers to understand requirements and build new software or extend existing software. You are a keen problem solver with the expertise and experience building extensible, maintainable, highly available, scalable, performant and observable quality software, comfortable with modern engineering practices and backend development technologies. You'll use innovation to improve the customer experience and efficiency of engineering teams. The solutions that you will be responsible for will have a global reach, impacting millions of customers. Some of the tech we are using at scale: Javascript, Typescript, Node.JS, GraphQL, REST, Kafka, Azure Cloud, Redis, Varnish Cache, Apollo Federation, Docker, Kubernetes etc. About the team Tesco's xAPI (Experience API) powers Tesco's online shopping, enabling customers to discover and shop online from diverse client applications & devices i.e. web, mobile-apps, tills in-store, scan as you shop, tablets, voice assistants etc. We, the xAPI team, build products that provide the experience APIs (GraphQL) for building client applications and handle all the device traffic to support the user experience for the end user's shopping lifecycle from product discovery to purchase to returns and refunds, shopping history. We build, develop and maintain massive scale, highly performant REST/GraphQL API services, backend for frontend services that enable ease of client application development and our success is the difference between millions of happy customers or millions of missed opportunities. We are building systems to solve real world problems at scale, impacting tens of millions of customers. Teams of great Engineers (and Managers and Product Managers) to learn from. We are agile and enlightened in our approach to building software and teams. There's a great atmosphere and we work sustainably as a team. Tesco has a "do the right thing" mentality. We promote flexible working. Job Responsibilities Use your in depth knowledge of JavaScript, TypeScript, Node.JS, cloud and the backend services ecosystem to develop and deploy scalable backend systems. Work with product managers to understand business/product requirements. Translate requirements into tasks & code. Commit code early and often, demonstrating understanding of version control & branching strategies. Automate everything by default. Write secure code by default. Write maintainable code and observe basic hygiene practices. Implement relevant project instrumentation. Profile and optimise code. Apply understanding of cohesion and the SOLID principles to create well structured, maintainable software. Identify patterns in code and refactor the code towards them where it increases understanding and/or maintainability with minimal guidance. Produce test driven features in a specific programming language and demonstrate familiarity with TDD. Follow the best practices of continuous BDD/TDD/Performance/Security/Smoke testing. Work effectively with product stakeholders to communicate and translate needs into product improvements. Lead group discussions on system design and understand domain well enough to work with Product Managers to drive value. Support production systems, resolve incidents and perform root cause analysis. Debug/find complex problems and support/maintain the software solution. Share knowledge with the wider engineering community. Mentor and develop others around you. Produce proof of concepts to evaluate new tools. You will need We are looking for people who have a passion for Technology. You will demonstrate experience of different platforms and technologies. We expect to see some or all of the following: 7+ Years professional experience as a Backend Software Developer. At least 4 years of experience in backend development using JavaScript, TypeScript, Node.JS and related backend technologies, frameworks. Exposure to a variety of JavaScript frameworks and libraries such as Next.JS, React.JS and testing using Jest, Mocha.JS, Cucumber etc. Experience of using Node.js to create high traffic applications using Express.js, Sails, Koa or similar. Knowledge of microservices development and deployment in the cloud i.e. Azure/AWS/GCP cloud. Knowledge of virtualization, containerization and container orchestration technologies like Docker, Kubernetes etc. Experience with usage of GraphQL, building GraphQL servers and GraphQL Federation technologies like Apollo Federation. Experience with using and building REST API services. Knowledge of distributed messaging systems like Kafka, RabbitMQ etc. Knowledge of distributed caching technologies like Redis. A desire to write readable, maintainable, modular and extendable code. Exposure to the DevOps model. Experience in Lean and Agile environments and understanding of principles behind methodologies such as BDD, ATDD and TDD.

Fullstack Developer London, United Kingdom Posted about 1 year ago This is a job posted by our partner Jooble Tech stack Databases SQL React Financial Services JavaScript Node.js NoSQL Full-stack TypeScript Below is a snippet of the job description. To read the full text, please click on the "Apply Now" link. You will need: Extensive experience working with React, TypeScript & JavaScript Experience working with Node on the backend Strong experience working with various databases and working in the past SQL / NoSQL technologies Good background as a Fullstack Developer for one of my London-based Financial Services Clients.

United States Digital Space LLC is seeking a highly skilled Java Fullstack Developer with expertise in Camunda to develop and orchestrate workflows. The successful candidate will work on both backend and frontend technologies, using Java for backend services and React for the user interface. A hybrid working model promotes a mixture of office, client site, and home working. Ideal candidates should have over 10 years of experience in software development, particularly with Camunda, Java, and various development tools. The role requires active participation in SCRUM ceremonies and delivering high-quality code with 100% test coverage.

Java Script Works is seeking a Senior Full Stack Developer based in London, United Kingdom. The role demands strong skills in JavaScript, AWS, and Spring Framework. Responsibilities include mentoring junior developers, providing technical leadership, and developing high-quality code using React or Angular along with backend technologies like Java and Spring Boot. The position is full-time but does not provide visa sponsorship.

About the role As a backend development Engineer, you'll be working in an agile team of industry leading engineers to define and develop Tesco's xAPI (Experience API) that powers Tesco's various shopping experiences i.e., the mobile shop application, store and other internal facing applications. You'll be a passionate, pragmatic Engineer with an inquisitive mind who is motivated to make change for the better and most importantly put our customer first. You'll enjoy working as part of a team, liaise with product and program managers to understand requirements and build new software or extend existing software. You are a keen problem solver with the expertise and experience building extensible, maintainable, highly available, scalable, performant and observable quality software, comfortable with modern engineering practices and backend development technologies. You'll use innovation to improve the customer experience and efficiency of engineering teams. The solutions that you will be responsible for will have a global reach, impacting millions of customers. Some of the tech we are using at scale: Javascript, Typescript, Node.JS, GraphQL, REST, Kafka, Azure Cloud, Redis, Varnish Cache, Apollo Federation, Docker, Kubernetes etc. About the team Tesco's xAPI (Experience API) powers Tesco's online shopping, enabling customers to discover and shop online from diverse client applications & devices i.e. web, mobile-apps, tills in-store, scan as you shop, tablets, voice assistants etc. We, the xAPI team, build products that provide the experience APIs (GraphQL) for building client applications and handle all the device traffic to support the user experience for the end user's shopping lifecycle from product discovery to purchase to returns and refunds, shopping history. We build, develop and maintain massive scale, highly performant REST/GraphQL API services, backend for frontend services that enable ease of client application development and our success is the difference between millions of happy customers or millions of missed opportunities. We are building systems to solve real world problems at scale, impacting tens of millions of customers. Teams of great Engineers (and Managers and Product Managers) to learn from. We are agile and enlightened in our approach to building software and teams. There's a great atmosphere and we work sustainably as a team. Tesco has a "do the right thing" mentality. We promote flexible working. Job Responsibilities Use your in depth knowledge of JavaScript, TypeScript, Node.JS, cloud and the backend services ecosystem to develop and deploy scalable backend systems. Work with product managers to understand business/product requirements. Translate requirements into tasks & code. Commit code early and often, demonstrating understanding of version control & branching strategies. Automate everything by default. Write secure code by default. Write maintainable code and observe basic hygiene practices. Implement relevant project instrumentation. Profile and optimise code. Apply understanding of cohesion and the SOLID principles to create well structured, maintainable software. Identify patterns in code and refactor the code towards them where it increases understanding and/or maintainability with minimal guidance. Produce test driven features in a specific programming language and demonstrate familiarity with TDD. Follow the best practices of continuous BDD/TDD/Performance/Security/Smoke testing. Work effectively with product stakeholders to communicate and translate needs into product improvements. Lead group discussions on system design and understand domain well enough to work with Product Managers to drive value. Support production systems, resolve incidents and perform root cause analysis. Debug/find complex problems and support/maintain the software solution. Share knowledge with the wider engineering community. Mentor and develop others around you. Produce proof of concepts to evaluate new tools. You will need We are looking for people who have a passion for Technology. You will demonstrate experience of different platforms and technologies. We expect to see some or all of the following: 7+ Years professional experience as a Backend Software Developer. At least 4 years of experience in backend development using JavaScript, TypeScript, Node.JS and related backend technologies, frameworks. Exposure to a variety of JavaScript frameworks and libraries such as Next.JS, React.JS and testing using Jest, Mocha.JS, Cucumber etc. Experience of using Node.js to create high traffic applications using Express.js, Sails, Koa or similar. Knowledge of microservices development and deployment in the cloud i.e. Azure/AWS/GCP cloud. Knowledge of virtualization, containerization and container orchestration technologies like Docker, Kubernetes etc. Experience with usage of GraphQL, building GraphQL servers and GraphQL Federation technologies like Apollo Federation. Experience with using and building REST API services. Knowledge of distributed messaging systems like Kafka, RabbitMQ etc. Knowledge of distributed caching technologies like Redis. A desire to write readable, maintainable, modular and extendable code. Exposure to the DevOps model. Experience in Lean and Agile environments and understanding of principles behind methodologies such as BDD, ATDD and TDD.

Overview The Opportunity: As a Senior Developer, you'll have significant autonomy to shape how some of the world's largest telecom operators communicate with consumers and detect issues across their networks. You'll help evolve the platform into a proactive, intelligent system built around Observe - Think - Act workflows, designing autonomous, AI driven operations that surface insights, trigger actions, and streamline complex network processes at scale. You'll work across the full stack, building intuitive interfaces in React and architecting resilient Python backend systems capable of handling massive volumes of time series telemetry. You'll join a dynamic, experienced global product and engineering team, collaborating with specialists across mobile SDKs, cloud platforms, and large scale distributed systems, while working directly with global customers. Key Responsibilities Full-Stack Development: Develop and maintain robust, scalable web applications using React, Redux, and modern backend frameworks. Automation & AI Features: Move the platform from reactive reporting to proactive operations by implementing Observe Think Act loops for network outage detection and communication. Maintain Technical Quality: Write clean, maintainable, and efficient code while conducting high signal code reviews to elevate engineering standards. Collaborate Cross Functionally: Work closely with Product teams to translate emerging AI capabilities into high performance features for our global operator clients. Scale Data Processing: Help maintain and optimize backend services capable of handling high volume network telemetry and time series data. Experience integrating third party APIs, AI services, webhooks, and event driven workflows into production applications. Job Qualifications 5 to 8 years of professional software engineering experience. Experience in mentoring or leadership. Strong proficiency in Python (FastAPI or Django) and experience designing scalable RESTful APIs. Proficient in React and Redux with hands on experience building complex, data heavy web applications. Hands on experience using AWS to build and scale web applications, including containerization (Docker/Kubernetes). Systems Thinker: Strong ability to break down complex manual problems into deliverable, automated technical sub tasks. PLUS: AI Frameworks: Hands on experience deploying AI agents into production or proven exposure to tools like LangChain, LangGraph, or LlamaIndex. PLUS: Experience with anonymization techniques, data privacy and GDPR. PLUS: Domain: Understanding of network monitoring, telecommunications data, or performance testing. Benefits The company offers competitive salaries and robust, health and wellness focused benefits. We are committed to work life balance with paid time off when you need it. Other benefits include Employee Resource Groups, company sponsored events, educational support, mentorship programs, and career development resources. Employees are recognized through engagement programs and recognition awards. Compensation Range Base pay range: £50,000 to £80,000. Ziff Davis is an Equal Opportunity Employer. At Ziff Davis, Diversity, Equity, and Inclusion (DEI) has always been about fairness, equal opportunity, and belonging. DEI enables us to attract and retain the best talent, regardless of background or circumstances, while enabling our thousands of employees worldwide to thrive.

High Level of Knowledge High level of knowledge of Low-Code UI and API Development. Technical Skills Proficiency in JavaScript/TypeScript and React for frontend development Experience with Python or Java for backend services Responsibilities Experience working with data Develop interactive dashboards and operational tools that are capable of populating visuals with real-time data using React and TypeScript Collaborate with AI/ML teams to embed models into operational workflows Ensure code quality, scalability, and

We don't just believe in better. We make it happen. "Better content. Better products. And better careers." Working in Tech, Product or Data at the company is about building the next and the new. From broadband to broadcast, streaming to mobile, the company Stream to the company Glass, we never stand still. We optimise and innovate. We turn big ideas into the products, content and services millions of people love. And we do it all right here at the company. Role/ Team overview The AppSec Tooling team at the company is responsible for enabling secure software development practices across the organisation. We build and operate platforms that support penetration testing activities, including the scheduling, organisation, and management of testing engagements, as well as capabilities for threat modelling, security reporting, and vulnerability remediation. This is an exciting opportunity to join the AppSec Tooling function at the company as we continue to scale our platforms and services. We are expanding our UK-based capability to ensure software security is embedded by default across the company's engineering estate. This role requires strong hands on software security knowledge, the ability to investigate and respond to application level security vulnerabilities and incidents, and the confidence to influence engineering teams toward secure by design outcomes at scale. What you'll do Work closely with software engineering, platform, and DevOps teams to embed security into the end to end software delivery lifecycle across AWS based environments Support and guide the secure development of cloud native applications, APIs, and backend services using technologies such as Python, JavaScript, and PHP Provide practical guidance on secure application design, authentication, access control, secrets management, and resilient cloud architectures Integrate security, testing, and automation controls into CI/CD pipelines and development workflows while maintaining a strong developer experience Contribute to the development and maintenance of infrastructure as code, cloud automation, and scalable platform capabilities within AWS environments Drive the adoption of engineering guardrails, reusable security patterns, and automation that enable teams to deliver securely and efficiently at scale Support the identification, investigation, triage, and remediation of application and platform vulnerabilities in collaboration with engineering teams Contribute to security incident response activities, including root cause analysis, remediation support, and continuous improvement initiatives Work with platform and engineering teams to improve monitoring, logging, alerting, and observability practices across distributed systems Promote a positive engineering and security culture through coaching, collaboration, knowledge sharing, and day to day engagement with development teams What you'll bring Strong understanding of modern software engineering practices, secure development principles, and common application security risks Experience developing and supporting cloud native applications using Python, JavaScript, and/or PHP within AWS based environments Familiarity with designing and integrating RESTful APIs, backend services, and event driven architectures Experience integrating security, testing, and automation controls into CI/CD pipelines and software delivery workflows Hands on experience with infrastructure as code and cloud automation to provision and manage scalable AWS environments Experience working with containerised applications and modern platform technologies in distributed systems Understanding of secure authentication, access control, secrets management, and security best practices in cloud environments Experience implementing monitoring, logging, alerting, and observability practices for operational resilience and troubleshooting Ability to investigate, triage, and help remediate application and platform security issues in collaboration with engineering teams Strong problem solving, collaboration, and communication skills, with the ability to work effectively across engineering, platform, and security teams in fast paced environments Benefits and perks Free the company TV or NOW package, including the company Sports and the company Cinema Pension package with up to 9% employer contribution Private healthcare with mental health support Aviva Digital GP and dental insurance Discounts on the company products, including the company Mobile, the company Broadband, the company Glass and the company Protect Sharesave and Tech schemes A range of the company VIP rewards and experiences How you'll work At the company, we want to be a community that thrives by being together. Flexible working remains a key part of that. We want our people to have the best of both worlds - time working at home, as well as time in the office. The hybrid working expectations for this role are 2 days in the office per week. Your office base Osterley Our Osterley Campus is a 10 minute walk from Syon Lane train station. Or you can hop on one of our free shuttle buses that run to and from Osterley, Gunnersbury, Ealing Broadway and South Ealing tube stations. There's also plenty of bike shelters and showers. On campus, you'll find 13 subsidised restaurants, cafes, and a Waitrose. You can keep in shape at our subsidised gym, catch the latest shows and movies at our cinema, get your car washed and even get pampered at our beauty salon. Who we are We're the company, a leading media and entertainment company who connect millions with entertainment, sports, news and arts through innovative products and services. Working with us means you'll be bringing the joy of a better experience to more people, every day. All so we can do better and deliver better for our customers, colleagues and society. We're an equal opportunity employer and value diversity at our company. We're a Disability Confident Accredited Employer, and welcome and encourage applications from all candidates. We will look to ensure a fair and consistent experience for all and will make reasonable adjustments to support you where appropriate. Please flag any adjustments you need as early as you can. Just so you know: if your application is successful, we'll ask you to complete a criminal record check. And depending on the role you have applied for and the nature of any convictions you may have, we might have to withdraw the offer. To be eligible for this role you are required to have the appropriate right to work in the UK. Please be aware the company does not offer sponsorship for this position. 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