1 to 25 of 85 Permanent API Design Jobs in the UK

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success.Why Join Us To shape the future of travel … fuel our employees' passion for travel and ensure a rewarding career journey. We’re building a more open world. Join us.Director, Product Management – Rapid API – New Lines of BusinessExpedia Group B2B is the engine behind thousands of global travel partnerships — powering OTAs, airlines, loyalty programmes, travel management companies ...

Expedia Group brands power global travel for everyone, everywhere. We design cutting‐edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. To shape the future of travel, people must … employees' passion for travel and ensure a rewarding career journey. We’re building a more open world. Join us. Director, Product Management – Rapid API – New Lines of Business Expedia Group B2B is the engine behind thousands of global travel partnerships — powering OTAs, airlines, loyalty programmes, travel management companies ...

Director, Product Management – Rapid API – New Lines of Business Expedia Group is a global travel technology company that connects partners with the world’s most comprehensive travel inventory. Responsibilities Define and own the multi‐year product roadmap for Rapid APIs across Vrbo, Car, Activities, and Ground Transportation, aligning with … growth strategy and partner demand signals. Directly manage a team of four Product Managers, each responsible for a distinct API domain (Vrbo, Car, Activities, and Ground Transportation), providing coaching, career development, and clear accountability frameworks. Develop close relationships with key B2B partners to understand their needs, participating in QBRs ...

Overview Provide technical leadership across development teams to ensure the design and delivery of high-quality, scalable, and maintainable software solutions. The role combines hands-on development expertise with leadership responsibilities, translating business requirements into robust technical solutions while driving engineering excellence, delivery consistency, and collaboration across onshore … offshore teams. Responsibilities Technical Leadership & Solution Delivery Lead the design and development of key features, components, and services across the application stack Provide hands-on guidance in building scalable applications using React, Node.js, and TypeScript Own critical technical decisions, ensuring alignment with architectural standards and long-term scalability goals ...

metrics framework to track performance and guide prioritisation. Discovery & Delivery Lead end‐to‐end product development: from problem discovery and requirements definition through to API and data model design, launch, and iteration. Work closely with engineering counterparts to design foundational services and APIs that are clean, scalable … confidence. About You Experience Product management experience with a track record of owning complex, infrastructure‐level or platform products end‐to‐end. Experience with API design and data architecture – you care deeply about modelling real‐world complexity cleanly and building systems other teams can depend on. Comfortable operating ...

that align with company-wide engineering direction Champion continuous improvement; identify tech debt, propose modernisation, and improve developer experience Contribute to architectural decisions around API design, infrastructure patterns, and cross-service integration Collaborate with platform/infrastructure teams to evolve integration patterns Support CI/CD pipelines … team-wide engineering standards Required Skills & Experience Backend/BFF Node.js (v20+) with TypeScript AWS Lambda handler development (both SST and raw CDK patterns) API Gateway (REST/V1) - authorizers, routing, gateway responses Middy middleware framework Integration patterns: cross-account STS AssumeRole, Secrets Manager, DynamoDB, SNS RESTful API ...

genuine impact on technical direction, engineering standards, and long-term platform strategy. As a Senior Backend Engineer, you will take ownership of backend architecture, API design, infrastructure, and platform reliability. You will work closely with developers across the business to improve scalability, security, performance, and operational excellence while … experience working with AWS cloud infrastructure including services such as Lambda, RDS, S3, and IAM * Strong understanding of application security, authentication, authorisation, and secure API design * Experience designing, optimising, and scaling relational databases (PostgreSQL preferred) * Experience with CI/CD pipelines, DevOps practices, and production environments * Comfortable leading ...

Junior C++ Developer - Manchester/Hybrid (Junior C++ Developer, C++ Developer, Software Developer, C++, Qt/QML, API Design, Agile DevOps, Low latency, C4/UML, Junior C++ Developer, C++ Developer, Software Developer) Our client is a global innovator and world leader with one of the most recognisable … Junior C++ Developers with some experience using C++ 20 or later. Any experience with the Qt framework would be helpful, as would experience in API Design (Rest, GraphQL and events), Application monitoring and high performance and low latency engineering. A DevOps mindset and any Agile knowledge would also ...

external electronic health record (EHR) system data. Monitor and maintain MySQL databases to guarantee optimal performance and reliability. Collaborate with the backend team to design and implement APIs supporting Circadia's suite of products. Architecture: Design, deploy, and manage AWS infrastructure solutions to support various applications and services. … Design scalable systems for storage and processing of large amounts of medical data. Manage databases (e.g., MySQL, MongoDB), optimizing for performance, scalability, and cost-efficiency. Manage compute clusters (e.g., ECS), serving various internal and customer-facing products and services. Utilize Terraform to efficiently manage cloud infrastructure. Ensure high availability ...

solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens. We are passionate about user-centred design, agile delivery, and building digital services that make a real difference. Our teams work at the forefront of innovation, helping organisations transform and deliver … government client. As a Senior Developer, you will bring strong hands-on experience across both .NET and Python, contributing to cloud-native API development, Legacy modernisation, and DevSecOps practices - all within a Microsoft Azure environment and aligned to the highest engineering and security standards. Key Responsibilities Design, develop ...

senior individual contributor who combines hands-on Java development with architectural leadership, remaining close to implementation and setting the technical standard through design, code-level guidance, and practical problem solving. Design, build, and evolve highly available, high-throughput, zero-downtime systems and internet-facing APIs that can scale … securely for large retail and external client volumes. Lead architectural decisions across API design, domain modelling, integration patterns, resilience, observability, and operational robustness, ensuring the platform is fit for 24/7 global production use. Work across multiple software engineering teams to drive consistency in engineering standards, development ...

improved valuation,, internal market and others) are architecturally coherent, reusable and aligned with bp's enterprise technology strategy. Establish and chair the GPTI Architecture Design Authority, governing all significant change through structured reviews, design challenges and sign-off gates. Influence and advise VP/SVP-level stakeholders … through risk analytics (VaR, Greeks, Monte Carlo, stress testing), P&L attribution, settlement, invoicing, confirmations and regulatory reporting (REMIT, EMIR, MiFID II, ACER). Design and govern the market connectivity architecture, covering exchange connectivity, broker interfaces, electronic trading platforms, TSO/DSO nomination interfaces and real-time price feeds. ...

Ability to set clear goals, run effective performance cycles, and foster a culture of accountability and growth Experience facilitating cross‐functional collaboration across Product, Design, Platform, and Infrastructure stakeholders Strong communicator able to translate technical complexity for non‐technical audiences Technical Depth Solid hands‐on background in backend engineering … sufficient to credibly guide technical decisions, conduct design reviews, and support engineers day‐to‐day Familiarity with Node.js/TypeScript backend systems and modern backend frameworks (e.g., Hapi.js, Express, Fastify, or NestJS) Grounding in Clean Architecture, Domain‐Driven Design (DDD), and modular system design Understanding of RESTful ...

Location: Glasgow Head Office Full time, permanent role (37.5 hours per week) JOB PURPOSE: This role will be responsible for driving the design, architecture and delivery of AI-powered solutions across the group. It will be critical in implementing production-grade systems that leverage LLMs, with a focus … production engineering - setting technical direction, mentoring a high-performing team, and ensuring AI solutions are robust, scalable, and responsible. PRINCIPAL TASKS AND RESPONSIBILITIES Design and implement secure and scalable LLM-powered applications using modern Generative AI architectures Collaborate with product, data and ops team to identify the issues ...

someone who thrives in a scaling environment and enjoys balancing delivery with long-term system design. Key Responsibilities Backend Architecture & Development Own the design and evolution of backend services, including architecture, coding standards, and system design Build and maintain production-grade services using modern backend technologies (e.g. … TypeScript/Node.js or equivalent backend environments Deep familiarity with AWS and cloud-native architectures (e.g. Lambda, containers, managed databases) Strong understanding of: System design and distributed systems Database design and performance optimisation API design and service architecture Experience working in product-led, agile environments ...

venture backed by the strength and stability of an established business. Key Responsibilities End-to-end development of high-quality, scalable SaaS platforms from design through deployment and maintenance. Architect and implement robust backend services primarily using Python and PostgreSQL. Develop and maintain responsive, performant front-end applications with … Provide technical mentorship and leadership to development teams, fostering best practices in coding, testing, and deployment. Participate in code reviews, architecture discussions, and system design decisions. Troubleshoot and resolve complex technical issues across the full stack. Ensure software security, scalability, and performance are maintained at all times. Keep abreast ...

complex technologies, wed love to hear from you! Role Overview As a Systems Engineer, you will play a critical role in supporting the specification, design, integration, and test of cloud-based software and interfaces that enable seamless operations and communications for our Optical Ground Stations. This role involves working … systems engineering, and operational workflows. Key Responsibilities Define and document system-level requirements for cloud-based software supporting the operation of Optical Ground Stations. Design scalable, secure, and reliable system architectures and manage APIs, ensuring scalability, security, and operational reliability. Serve as the primary technical point of contact ...

Required Technology 15+ years of progressive software engineering; 5+ years leading AI‐native solutions at enterprise scale. Hands‐on with LLMs and agentic frameworks; design and deploy AI systems that augment SDLC (requirements → coding → testing → ops). Tooling & Platforms (practitioner proficiency) Claude Code (Anthropic) for secure, context‐rich code …/Gemini for research workflows where permitted; govern enterprise knowledge ingestion. Architecture & Integration Distributed systems, microservices, cloud‐native (Azure/AWS/GCP); secure API design (REST/GraphQL). MLOps & AIOps: CI/CD for AI, model lifecycle (eval, versioning, rollout/rollback), guardrails, telemetry, drift monitoring ...

Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

multi‐stakeholder deals, and usage‐based commercial models rather than seat‐based subscriptions. This is a 0‐to‐1 build. If you have built API or data products before and want to do it again in a market where the opportunity is wide open, this is it. What … catalogue decisions: which datasets to expose, in what format, through which channels, and in what order, balancing client demand, data readiness, and commercial potential. Design the developer experience end‐to‐end: API design, documentation, developer portal, sandbox/playground, error handling, rate limiting, and versioning. Work with ...

Java, Python, React , and MongoDB to join a high-performing engineering team . You will work across the full development lifecycle, contributing to the design, build, and delivery of high-quality software solutions. The role requires strong technical expertise, proactive problem-solving, and the ability to collaborate effectively … multidisciplinary teams. Key Responsibilities Design, develop, test, and deploy high-quality software solutions using Java , Python , React , and MongoDB . Participate in solution design, estimation, and technical decision-making. Develop reusable components and shared services. Work within Agile teams to support sprint planning, refinement, and retrospectives. Ensure code ...

best practice implementation across: Stateless architecture Health check endpoints Secure secret management (Azure Key Vault) Containerisation standards and deployment readiness The Integration Engine Lead API and integration strategy, including: RESTful API design OAuth2 authentication flows (including FusionAuth) Event-driven systems via Azure Service Bus Transactional email logic ...

Senior Engineering Manager to lead the Loan Portfolio Mitigation Application (IRIS). The successful candidate will lead a team of software developers, overseeing the design, development, and implementation of sophisticated credit risk hedge decision systems. This leadership role requires a deep understanding of financial markets, quantitative methodologies, robust software … grade solutions at scale. The ideal candidate is a practitioner-leader who does not just direct from the sidelines, but actively engages in technical design, architectural decision-making, and hands-on development. You will serve as the definitive technology authority for IRIS, owning end-to-end solutioning from requirements ...

efficiency and improve transparency within the firm and across our broad community of investors and portfolio companies.BXTI is nimble and entrepreneurial – our open, iterative design processes and rapid pace of development mean that everyone on the team has the opportunity to make an impact from day one. … with proficiency in C#, JavaScript (React and/or Angular), Typescript, databases (relational and/or NoSQL), and cloud technologies, preferably AWS.Experience with RESTful API design, development, and scalable microservice architecturesAbility to develop scalable, secure, and maintainable code, with a strong background in object-oriented programmingExcellent problem-solving ...

people who bring something new to the team, not just technical skills. What You'll Be Doing As a Senior Backend Developer, you will design, build, and optimise high-quality server-side applications and APIs that power complex digital experiences. Working closely with front-end engineers, DevOps specialists, cloud … building scalable APIs and microservices Hands-on experience with cloud platforms (AWS, Azure, or GCP), including serverless compute Solid understanding of authentication, authorisation, and API security best practices Strong problem-solving skills and familiarity with cloud-native development patterns Desirable Experience with headless e-commerce platforms such as commercetools ...