126 to 150 of 203 API Design Jobs in the UK

Strong in a semi‐mainstream programming language (e.g. Python, Typescript, Rust, Go, etc) Proficient with frontend/GUI framework Good understanding of data processing, API design/integration, and system architecture Comfortable adopting new tools and technologies as needed — adaptability is more important than narrow specialisation security/… software for business critical, web‐based applications Build eye‐catching, functional, efficient, and reusable web and mobile‐based sites that drive these web applications Design, build, test, document and maintain APIs and integrations Ensure quality control using industry standard techniques such as automated testing, pairing, and code review Work ...

shape the future of knowledge graph and AI platforms? We are looking for an experienced Knowledge Graph Architect to lead technical direction, drive ontology design, and set standards for a high-performing graph ecosystem. What You'll Do Define Strategy & Architecture: Own the overall technical architecture and target state … knowledge graph platform, ensuring it scales, performs, and remains maintainable. Lead Ontology Governance: Drive the design and governance of the ontology so it accurately reflects business semantics and supports complex downstream use cases. Set Best Practices: Establish modelling standards for nodes, relationships, and properties across the graph. Guide Integration ...

clearance for an initial 3 month contract, 2-3 days on site in London per week, paying £550/day outside IR35 – to design, build, and manage integrations across Oracle SaaS modules (ERP, HCM, SCM) using Oracle Integration Cloud (OIC). The ideal candidate combines strong technical integration skills … business requirements with technical delivery. Working knowledge of Oracle PaaS and IaaS is essential to support end‐to‐end cloud integration architectures. Key Responsibilities Design, develop, and deploy integrations across Oracle Fusion ERP, HCM, and SCM modules using Oracle Integration Cloud (OIC). Build and maintain integrations using ...

their career in Solution Architecture or is ready to transition from Business Analysis or Integration Developmen t into a role where you'll help design innovative enterprise integration solutions for a diverse client base. Working alongside experienced Solution Architects and delivery teams, you'll gain valuable exposure to enterprise … integration projects while developing your expertise in solution design, architecture best practices, and modern iPaaS technologies. This is a fantastic opportunity for someone who enjoys combining technical knowledge with business engagement and wants to develop into a senior architecture role. Key Responsibilities Support the design and documentation ...

work: We're a small team that ships frequently and iterates on real partner feedback. Engineers own features from technical discovery and design through to production support. We work closely with our PM and designer to understand partner needs, and with adjacent teams (API Experience, Account Discovery … identity mapping between partner systems and Wise. • The communication layer services between Wise and partners, extending them to handle new case types and workflows. • API design for partner-facing endpoints. We care about consistency, documentation, and making them usable without hand-holding. • Work with FinCrime, Compliance ...

backed by experience, and prefer building over maintaining. What You'll Do Build and launch product features end-to-end, from idea to production. Design scalable APIs and backend systems. Develop modern frontend experiences using React and TypeScript. Integrate LLMs and AI agents into production workflows. Collaborate directly with … occasional productivity boost. Tech Stack You'll work across a modern AI-native technology stack including TypeScript, React, Node.js, Rust, Azure, Docker, RESTful API design, AI agents, Large Language Models (LLMs), and full-stack application development . Experience integrating OpenAI, Anthropic, or similar LLM APIs into production environments ...

shape the future of knowledge graph and AI platforms? We are looking for an experienced Knowledge Graph Architect to lead technical direction, drive ontology design, and set standards for a high-performing graph ecosystem. \n What You'll Do \n \n Define Strategy & Architecture: Own the overall technical architecture … target state for the knowledge graph platform, ensuring it scales, performs, and remains maintainable. \n Lead Ontology Governance: Drive the design and governance of the ontology so it accurately reflects business semantics and supports complex downstream use cases. \n Set Best Practices: Establish modelling standards for nodes, relationships ...

Multi-Agent Architectures Python & modern software engineering practices Cloud platforms (Azure, AWS or GCP) MLOps/LLMOps, CI/CD and model deployment API design, orchestration and enterprise-scale AI solutions Desirable: Consulting or professional services experience Vector databases, knowledge graphs and advanced retrieval techniques AI or Cloud ...

defining the future product and platform experience, patterns, and contribution pathways that will enable federated scale over time. ML Engineers – Responsibilities & Skills Responsibilities Design and build MCP servers and tools that expose enterprise systems and workflows to AI agents. Implement Skills that orchestrate tools, data, and reasoning into repeatable … governed workflows. Contribute to the LSEG AI Assist agentic harness, including planning, tool‐calling, and orchestration logic. Build secure API wrappers where backend systems lack suitable authentication or entitlement models. Work closely with product teams in a “build for” capacity, transferring knowledge and establishing reusable patterns. Shape the developer ...

working hours, patterns and locations to suit you and our business. About the Opportunity As a Principal Solutions Architect, you will specialise in the design, development and governance of integrated digital project controls environments across major capital programmes. This is not a general IT solutions architecture role. … required. Key Responsibilities Define enterprise aligned solution architectures for programme controls platforms covering cost, schedule, risk, performance reporting and data governance. Lead evaluation, selection, design and configuration of programme controls systems such as EcoSys, Oracle Primavera P6 and Unifier, Aconex, CDEs including SharePoint and ProjectWise, and related digital delivery ...

across the business, embeds intelligent automation into products and workflows, and uses modern AI tools to accelerate engineering and innovation. What you'll do Design and build scalable backend services in Python (FastAPI or similar). Own cloud infrastructure across AWS (GCP experience a bonus). Build secure APIs … with product, data and client teams. What we're looking for Proven experience building and operating production backend systems at scale. Strong Python, Postgres, API design and AWS expertise. Experience with Redis, CI/CD and cloud‐native architectures. A genuine AI advocate with experience using ...

Lead, you will be involved in all aspects of the platform's development and ongoing enhancement. The role covers: Core Python application development Web API design, development and maintenance Database development and optimisation Infrastructure and Server Side processes Front End enhancements using JavaScript/Angular Test automation … role in driving Agile best practices, promoting high-quality engineering standards and helping shape the future direction of the platform. Key Responsibilities Design, develop and maintain Python-based applications and services Build and enhance APIs supporting critical business functionality Deliver enhancements and features through the Jira backlog Work closely ...

involved in all aspects of the platform's development and ongoing enhancement. \n The role covers: \n \n Core Python application development \n Web API design, development and maintenance \n Database development and optimisation \n Infrastructure and Server Side processes \n Front End enhancements using JavaScript/Angular … driving Agile best practices, promoting high-quality engineering standards and helping shape the future direction of the platform. \n Key Responsibilities \n \n Design, develop and maintain Python-based applications and services \n Build and enhance APIs supporting critical business functionality \n Deliver enhancements and features through the Jira ...

develop new features, enhance existing systems, and ensure our platform remains stable and efficient. Your deep understanding of Rails architecture, PostgreSQL optimisation, and API design will be essential as you contribute to ongoing development projects. If you enjoy collaborating in Agile/Scrum environments, value clean code ...

delivering multiple major milestones of products. Experience building scalable distributed systems running in public and/or private cloud environments. Knowledgeable of REST, API design patterns and microservices. Experience managing Full stack development teams, engineers working on UI Development and backend services. Familiarity with Container orchestration technologies ...

with delivery teams to guide implementation and resolve technical challenges. * Conduct architecture reviews for projects and change requests, validating alignment with EA standards. * Design end-to-end integration solutions across the firm's application estate (Aderant, iManage, Intapp, HubSpot). * Define API contracts, message schemas, and integration patterns … build vs buy decisions. * Conduct proof of concepts (POCs) and technical spikes to validate architectural approaches. Required Experience: * Experience in solution architecture, technical design, or senior development roles. * Strong experience designing integration solutions across enterprise applications. * Excellent knowledge of API design, messaging patterns, and integration architectures. * Experience ...

working hours, patterns and locations to suit you and our business. About the Opportunity As a Principal Solutions Architect, you will specialise in the design, development and governance of integrated digital project controls environments across major capital programmes. This is not a general IT solutions architecture role. … required. Key Responsibilities Define enterprise aligned solution architectures for programme controls platforms covering cost, schedule, risk, performance reporting and data governance. Lead evaluation, selection, design and configuration of programme controls systems such as EcoSys, Oracle Primavera P6 and Unifier, Aconex, CDEs including SharePoint and ProjectWise, and related digital delivery ...

Role Overview ICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands‐on delivery of a desktop platform automating and streamlining trading desk workflows. This is a high‐visibility player‐coach role that may evolve to include formal people management. Role Responsibilities … output. Own the technical direction of the ICRV greenfield project, developing high‐performance, scalable, and robust solutions from first principles through to production operation. Design for hard non‐functional requirements: latency and responsiveness budgets as acceptance criteria, crash containment, least‐privilege isolation between sub‐applications. Work effectively with ...

Expedia Group is seeking a Software Development Engineer II (Backend) to design, develop, and maintain high-throughput pricing services. You will implement caching, participate in API design, and collaborate with cross-functional teams to deliver scalable microservices. The role emphasizes experience with Java/Scala/Kotlin ...

executes complex, multi-leg synthetic strategies on behalf of institutional clients.**Role Overview**ICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands-on delivery of desktop platform automating and streamlining trading desk workflows. This is a high-visibility player-coach role: you will apply … output.* Own the technical direction of the ICRV greenfield project, developing high-performance, scalable, and robust solutions from first principles through to production operation.* Design for hard non-functional requirements: latency and responsiveness budgets as acceptance criteria, crash containment, least-privilege isolation between sub-applications.* Work effectively with ...

Expedia Group is seeking a Software Development Engineer II (Backend) to design and build high-throughput backend services for pricing. You will implement cache layers and participate in API design and data modeling for scalable microservices. The role emphasizes hands-on development with Java/Scala/ ...

templates, and agentic workflows, and wire them into application logic that connects with the department's Legacy and multi-cloud systems. Prompt Engineering & Evaluation Design, test, and iterate on prompts and retrieval strategies; run structured evaluations to track answer quality, retrieval accuracy, and hallucination rate over time. Responsible … build can be understood and maintained by internal government engineers. Required Skills & Experience Practical experience building applications using LLMs or other foundation models, via API or self-hosted Experience with RAG architectures, vector databases, and embedding-based retrieval Solid general-purpose programming (commonly Python) and API design ...

Chicago). The role offers the opportunity to contribute to business-critical systems while working in a collaborative and supportive environment. Key Responsibilities Design, develop, enhance, and maintain enterprise applications using C# and .NET technologies. Support and improve existing business-critical systems, ensuring stability, performance, and scalability. Work closely … with business users, analysts, and technical teams to gather requirements and deliver solutions. Participate in the full software development lifecycle, including design, development, testing, deployment, and support. Collaborate with globally distributed development teams across multiple locations and time zones. Contribute to technical discussions, solution design, code reviews ...

team that executes complex, multi-leg synthetic strategies on behalf of institutional clients.Role OverviewICRV are seeking an exceptional Principal Engineer to own the architecture, design and hands-on delivery of desktop platform automating and streamlining trading desk workflows. This is a high-visibility player-coach role: you will apply … C#/.NET (LTS): back-end services with ASP.NET Core.Experience designing and delivering event-driven, service-oriented back-end systems (message brokers, async workflows, API design) in a production trading environment.Experience building desktop applications that host web content (e.g., Electron, Tauri, or custom .NET host); comfortable with WebSocket ...

Technical Leader for the Connected Devices Platform to drive scale, resilience and new architectures. You will own high-volume streaming and backend services, shaping API design and data models to deliver reliable experiences. The role requires expert Java or Kotlin, distributed systems experience (Kafka), and knowledge of Kubernetes ...