76 to 100 of 192 API Design Jobs in the UK

with strong LLM experience ( Claude preferred). Key Responsibilities: Develop and maintain backend services using Java, with a strong focus on server-side engineering Design and implement scalable, secure, and high-performance APIs Lead backend development initiatives and enforce best coding practices Contribute to the React frontend, ensuring seamless … code reviews, architecture discussions, and performance optimization Requirements : Strong backend development experience with Java (preferably Spring Boot) Deep expertise in server-side architecture and API design/development Proficiency in React for frontend development Hands-on experience with LLM/AI tools (e.g., Claude or similar) and integrating ...

role: Talent Consulting are seeking a highly skilled Senior Technical Architect with proven central government experience to help our client assess and provide design assurance across a complex ecosystem comprising microservices, monoliths, singleton applications and distributed monoliths. As a Technical Architect you will be responsible for; Conduct comprehensive architectural … microservices, monoliths and distributed systems Evaluate current architectural patterns and identify opportunities for optimisation Develop strategic recommendations to support architectural evolution and modernisation Provide design assurance and technical governance across multiple application types Create migration roadmaps from monolithic to microservice architectures, where appropriate Establish architectural standards and best practices ...

people actually love to use? We are representing a globally recognized digital product studio that sits at the sweet spot of high-end aesthetic design and hardcore engineering. They're looking for a Lead Full-stack Engineer to join the growing function. This isn't a "ticket-taking" role. … robust, scalable backend. What You Bring to the Table React Node/TypeScript/JavaScript Cloud: AWS, Azure, or GCP. APIs: API design and integration (REST & GraphQL). Technical Leadership: ability to lead project end-to-end AI Tooling: Confident using AI-boosted environments to ensure quality (Claude ...

fast-growing, award-winning software company that delivers end-to-end cloud solutions for practices and businesses. They are looking for an API Engineer to join the team, where you'll be building API infrastructure that enables their product, third party integrations, their users and AI services … interact with their established product portfolio. Key Responsibilities: Design and implement RESTful APIs that expose product capabilities to AI services and third-party integrations Build production-grade APIs using C# .NET, SQL, and Azure services Implement authentication and authorization using OAuth and modern security patterns Write clean, maintainable, well ...

systems that are safer, smarter, and dramatically more environmentally responsible. Location: London or Porto The Role We’re seeking a Senior Software Engineer to design, build, and maintain backend containerised services that power our scalable edge‐compute platforms. You’ll work closely with a Software Team Lead and collaborate … leadership while remaining hands‐on with complex systems. What You’ll Do Build production‐grade software using .NET C#, Python , and modern backend technologies Design and prototype services using containerised microservices Apply and challenge engineering best practices to continuously improve quality Make sound technical decisions in high‐impact areas ...

agility with the backing of a well-established business. The Senior Back End Developer will... take ownership of backend engineering for a new API-first data intelligence platform. Role Highlights Design and build scalable backend systems from a true greenfield starting point Define architecture, balancing rapid delivery with … long-term scalability Develop API-first services for data-heavy, enterprise-grade applications Embed observability, metrics, and performance tracking from day one Collaborate within a small, high-autonomy team shaping a new product You Will Need Extensive backend development experience within data-driven B2B environments Strong programming skills ...

Senior Applied AI Engineer (.NET) Were looking for a Senior Applied AI Engineer to design and deliver production-grade AI-powered features within a modern .NET product environment. This is a hands-on engineering role focused on applying AI in real systems not training models. Youll work with commercial … role suits someone who has already successfully integrated AI into production products and can bring proven patterns into a growing team. What Youll Do Design and build AI-powered product features within a C#/.NET ecosystem Integrate commercial AI APIs into production systems with a focus on reliability ...

that power these systems, working in a multinational, AI-first engineering team where quality, ownership, and long-term thinking matter. What You’ll Do Design, build, and maintain scalable backend services for Keepnet’s Human Risk Management platform. Build clean, modular APIs that integrate internal services and third-party … enable automation, reporting, and security workflows. Develop testable, maintainable codebases using principles such as Clean Architecture, DDD, and TDD. Own the full development lifecycle : design, implementation, CI/CD (Azure), and post-release monitoring. Work on distributed and asynchronous systems using message queues, background workers, and event-driven workflows. ...

Improving engineering practices and contributing to shared standards Sharing knowledge through documentation, pairing and onboarding support Technology environment Frontend: React, TypeScript, shared component libraries, design systems and accessible UI principles Backend: Node.js with TypeScript, REST APIs, SQL and NoSQL databases Infrastructure: Modern CI/CD pipelines, automated testing … ownership of engineering projects end-to-end Experience working across multiple services or codebases in a product team Good understanding of databases, integrations and API design Experience building secure, performant and observable systems Clear communication skills and the ability to explain technical decisions A collaborative, supportive approach with ...

Experience You must have commercial experience or strong hands-on exposure to: Java (17+) Spring Framework Microservices architecture & REST APIs OpenAPI/Swagger for API design and documentation Test-Driven Development (TDD) Desirable/Nice-to-Have Skills Experience or familiarity with any of the following would … Redis Monitoring & observability tools (Grafana, Prometheus, Kibana) The Ideal Candidate Junior to early mid-level backend developer Happy working under guidance rather than leading design decisions Comfortable contributing to existing codebases Looking for stable contract work within the public sector ...

Experience You must have commercial experience or strong hands-on exposure to: Java (17+) Spring Framework Microservices architecture & REST APIs OpenAPI/Swagger for API design and documentation Test-Driven Development (TDD) Desirable/Nice-to-Have Skills Experience or familiarity with any of the following would … Redis Monitoring & observability tools ( Grafana, Prometheus, Kibana ) The Ideal Candidate Junior to early mid-level backend developer Happy working under guidance rather than leading design decisions Comfortable contributing to existing codebases Looking for stable contract work within the public sector ...

holds up under real world pressure. What you will be doing: Designing and building scalable backend systems in Python, with a strong focus on API design and data handling Owning features end to end, from discovery through to deployment and iteration Contributing to architectural decisions across a microservices … team What they are looking for: Strong Python experience, with a track record of building and maintaining production systems Solid understanding of system design, particularly around APIs and distributed architectures Experience working with AWS and modern deployment practices Engineers who care about code quality, CI/CD, and building ...

holds up under real world pressure. What you will be doing: * Designing and building scalable backend systems in Python, with a strong focus on API design and data handling * Owning features end to end, from discovery through to deployment and iteration * Contributing to architectural decisions across a microservices … team What they are looking for: * Proven Python experience, with a track record of building and maintaining production systems * Solid understanding of system design, particularly around APIs and distributed architectures * Experience working with AWS and modern deployment practices * Engineers who care about code quality, CI/CD, and building ...

large, ambitious commercial environment. THE ROLE: You will take ownership of designing and delivering backend services within a modern MACH-based digital platform (Microservices, API-first, Cloud-Native and Headless). Working closely with product, frontend and platform teams. Key responsibilities include: Designing, developing and maintaining scalable microservices using … practices across the team YOUR SKILLS AND EXPERIENCE: You will bring strong capability in: TypeScript and Node.js development Microservices-based architectures GraphQL and REST API design Working with SQL and NoSQL databases Modern software development practices, including CI/CD, testing and automation THE BENEFITS: You will receive ...

role, with strong backend expertise in Typescript and Node and front capability in React Proficiency in SQL, Redux, cloud services (AWS or GCP), RESTful API design and GraphQL Strong analytical skills with the ability to design, optimise, and troubleshoot complex UIs Excellent communication and leadership skills; ability ...

create the world’s leading, commercially scalable, safe, and advanced humanoid robots that seamlessly integrate into daily life and amplify human capacity. Responsibilities Design and implement a centralized cloud-based platform for managing a fleet of humanoid robots, monitoring system health, and visualizing fleet-level KPIs Develop robust backend … Expertise Proficiency in one of Python, Javascript, Golang or Rust Familiarity with React (or similar frameworks) for creating user-friendly web applications. Expertise in API design, data modeling, and distributed architectures Proficiency with CI/CD pipelines, containerization (e.g., Docker, Kubernetes), and workflow automation. Proficiency in infrastructure ...

enterprise-grade emotional brand science into the hands of every marketer → MCP server integrations and agentic tool chains — exposing our Human Motivation Framework as API-accessible AI tools that plug into Claude, Adobe, and enterprise martech stacks → Client-facing interactive products — brand simulators, revenue growth models, and AI-powered … Qualifications Proficient in front-end development: HTML, CSS, and modern JavaScript frameworks (React preferred) Skilled in back-end development: server-side languages, database management, API design Proven full-stack delivery — end-to-end ownership from architecture to deployment Strong experience with Claude Code — show us what ...

This role is designed for engineers who have built and operated large-scale systems end-to-end, not those with superficial exposure or purely design-focused experience. Candidates must have strong experience of Java Full Stack, React, Kubernetes & Docker. Experience in building responsive, component based user interfaces using modern … front end frameworks. Hands on expertise in API design and development (REST/JSON), including versioning and backward compatibility. Experience with UI testing, component testing, and front end build tooling. Experience in CI/CD pipelines, GitOps workflows, A/B testing strategies and also automating the workflows ...

Inside IR35 Duration - 12 months Location: Hybrid 2-3 days per week in Corsham Requirements: Seeking an experienced Full Stack Developer to support the design and delivery of a public facing government website aligned with GDS. This role focuses on building secure, scalable back-end services and accessible, maintainable … team, collaborating closely with front-end and back-end developers, solution architects, content designers and service leads to delivery user centred outcomes. Key responsibilities: Design, build, and maintain full-stack solutions supporting a public-sector digital platform Develop front-end user interfaces that are accessible, responsive, and aligned with ...

This is a hands-on engineering role focused on integrating commercial AI APIs into a .NET ecosystem not building models from scratch. You will design, develop, and deliver production-ready features that rely on services such as Anthropic Claude, AWS Bedrock, and OpenAI. AI-assisted development will … team where AI was embedded into real products and can bring proven patterns, practices, and standards into a new environment. What Youll Do Design and implement AI-powered product features within a C#/.NET stack Integrate commercial AI APIs into production systems with reliability and scalability in mind ...

Industry: Security & Intelligence/Government Technology What You’ll Be Doing: Develop and maintain secure, high-performance Java backend services for mission-critical systems Design scalable microservices and APIs that power data-driven platforms and operational tools Build distributed applications capable of handling large data volumes with speed … support live environments Main Skills Needed: Strong Java development experience (Java 11+) using frameworks like Spring Boot Solid understanding of software architecture, OOP and API design Experience building microservices and distributed systems Proven ability to deliver scalable, high-performance backend applications Familiarity with DevSecOps tools (Docker, Kubernetes ...

APIs, Graph QL, Python (nice to have), CI/CD What we're looking for: Strong backend engineering experience (Java + AWS) Microservices and API design expertise Exposure to financial services or regulatory environments (preferred) High visibility role, strong engineering culture, and opportunity to work on large-scale ...

contact for product progress, ensuring transparency and alignment. The skills you'll need: Proven experience as a Technical Product Owner, managing and delivering successful API-driven or integrated products across all stages of the product lifecycle. A strong focus on understanding and delivering value to build a best … class developer experience, and business users' needs, and with a keen awareness of the end customer experience. Expertise in API product management, including API design, documentation, and backend integration, with a deep understanding of scalable and reusable microservices architectures. Have experience of New Product Development. A versatile ...

similar highly desirable) Solid experience with MySQL, including optimisation and performance tuning Experience with modern JavaScript frameworks (React, Vue, Angular etc.) Strong understanding of API design (RESTful or GraphQL) Experience working with Linux environments Familiarity with Git, CI/CD pipelines, and agile methodologies A proactive, solutions-focused ...

Should be able to write unit test cases using any of the frameworks and should be completely automated. Should have strong exposure in REST API design principles. Should be able to develop reusable components using proper design patterns and implement the right solutions. Should be able ...