51 to 75 of 87 API Design Jobs in England

Significant experience building and running production systems on AWS (or major public cloud). Architecture: Deep understanding of Microservices and event-driven architectures, including API design and contract management. Engineering Best Practices: Strong grounding in testing (Unit/Integration/E2E), CI/CD, and Observability. Communication: Excellent ...

Significant experience building and running production systems on AWS (or major public cloud). Architecture: Deep understanding of Microservices and event-driven architectures, including API design and contract management. Engineering Best Practices: Strong grounding in testing (Unit/Integration/E2E), CI/CD, and Observability. Communication: Excellent ...

Develop and maintain high-quality software applications using .NET (4.5+/.NET Core) and Python. Collaborate with cross-functional teams to gather requirements and design effective solutions. Provide support to team members and stakeholders to ensure smooth project execution. Liaise with technical and business colleagues to understand functional requirements … deliver solutions that align with business objectives. Utilise your understanding of Web Services (REST, SOAP) to design and document APIs effectively. Work with MS SQL Server, including TSQL, SSIS, SSRS for database management and reporting. Utilise version control tools such as Git/Bitbucket and job scheduling tools like ...

working on the underlying systems that make complex visualisations fast, accurate, and scalable. The challenges range from rendering performance and interaction design through to algorithms, graphics, API design, and numerical correctness. What you’ll be doing Designing and building core charting features used by developers around … exceptionally high technical standards High levels of ownership and autonomy Small team, significant impact Opportunity to deepen expertise in performance, graphics, visualisation, and systems design Package Salary up to £200,000 Hybrid working (London) Private healthcare Pension Additional benefits If you’re interested in building the technology behind modern ...

must already have commercial experience working this way. You'll remain very hands-on with C#/.NET development while also contributing to software design, architecture and technical decisions. You'll work closely with the CTO, Head of Engineering and the original software author, gaining a deep understanding … Previous meaningful experience with WinForms Commercial TDD – Test first (Red/Green/Refactor) Strong automated testing Experience contributing to technical decisions and software design Ownership/modernisation of existing applications If you've previously worked with WinForms but have since moved into modern .NET, APIs or cloud development ...

must already have commercial experience working this way. You'll remain very hands-on with C#/.NET development while also contributing to software design, architecture and technical decisions. You'll work closely with the CTO, Head of Engineering and the original software author, gaining a deep understanding … Previous meaningful experience with WinForms Commercial TDD – Test first (Red/Green/Refactor) Strong automated testing Experience contributing to technical decisions and software design Ownership/modernisation of existing applications If you've previously worked with WinForms but have since moved into modern .NET, APIs or cloud development ...

must already have commercial experience working this way. You'll remain very hands-on with C#/.NET development while also contributing to software design, architecture and technical decisions. You'll work closely with the CTO, Head of Engineering and the original software author, gaining a deep understanding … Previous meaningful experience with WinForms Commercial TDD – Test first (Red/Green/Refactor) Strong automated testing Experience contributing to technical decisions and software design Ownership/modernisation of existing applications If you've previously worked with WinForms but have since moved into modern .NET, APIs or cloud development ...

must already have commercial experience working this way. You'll remain very hands-on with C#/.NET development while also contributing to software design, architecture and technical decisions. You'll work closely with the CTO, Head of Engineering and the original software author, gaining a deep understanding … Previous meaningful experience with WinForms Commercial TDD – Test first (Red/Green/Refactor) Strong automated testing Experience contributing to technical decisions and software design Ownership/modernisation of existing applications If you've previously worked with WinForms but have since moved into modern .NET, APIs or cloud development ...

must already have commercial experience working this way. You'll remain very hands-on with C#/.NET development while also contributing to software design, architecture and technical decisions. You'll work closely with the CTO, Head of Engineering and the original software author, gaining a deep understanding … Previous meaningful experience with WinForms Commercial TDD – Test first (Red/Green/Refactor) Strong automated testing Experience contributing to technical decisions and software design Ownership/modernisation of existing applications If you've previously worked with WinForms but have since moved into modern .NET, APIs or cloud development ...

architectures and platform guardrails Act as a senior technical authority, reviewing designs and ensuring solutions are secure, scalable, supportable and cost-effective Lead the design and evolution of platform capabilities spanning compute, storage, networking, orchestration and platform services Work closely with Product Owners and Architects to translate strategic objectives … Establish standards for event streaming, resiliency, monitoring and governance Support engineering teams in adopting event-driven architectures and microservices patterns Drive best practice around API design, domain boundaries and service resilience Improve developer productivity through self-service capabilities, reusable templates and engineering standards E ngineering Leadership Mentor engineering ...

architectures and platform guardrails Act as a senior technical authority, reviewing designs and ensuring solutions are secure, scalable, supportable and cost-effective Lead the design and evolution of platform capabilities spanning compute, storage, networking, orchestration and platform services Work closely with Product Owners and Architects to translate strategic objectives … Establish standards for event streaming, resiliency, monitoring and governance Support engineering teams in adopting event-driven architectures and microservices patterns Drive best practice around API design, domain boundaries and service resilience Improve developer productivity through self-service capabilities, reusable templates and engineering standards E ngineering Leadership Mentor engineering ...

designing and implementing APIs and integrations within complex digital ecosystems, including CRM, payment and marketing platforms. Database and data management. Strong expertise in database design and efficient querying in the context of web applications. Cloud and deployment. Practical experience with cloud platforms and managed hosting, particularly Azure and Umbraco … .NET practice Umbraco Cloud, or equivalent managed hosting experience, including environment strategy and deployment workflow Major version upgrade planning and delivery on live platforms API design and consumption, REST and GraphQL, including third-party integrations SQL Server and efficient data querying in a web application context Modern front ...

will deliver end-to-end features, working across enterprise Java and Node.js backend services while building responsive frontends using React and TypeScript. Key Responsibilities Design and deploy scalable microservices using Java (Spring Boot) and Node.js (Express/NestJS). Build modern, modular web interfaces using React and TypeScript. Develop … week alongside cross-functional team members. Requirements Tech Stack: Demonstrated production experience across Java, Node.js, React, and TypeScript. Architecture: Strong understanding of microservices, API design, and asynchronous communication patterns. Database & Tooling: Hands-on experience with SQL/NoSQL databases, Git, Docker, and CI/CD pipelines. Location: Must ...

deliver improvements for the firm. All of these sub-projects offer great exposure to linear products and working with the business. You will help design and build a suite of modern services including: Instrument Management Integration with enterprise data sources Support for pre-issuance, corrections, and overrides Direct integration … roadmap with multiple strategic deliverables What we are looking for in required skills; Strong C# development experience Real-time data and event-driven systems API design and backend service development Performance optimisation, threading, and memory management Experience building scalable, highly available systems What we would like ...

functional programming experience. Experience working in Agile development teams. Strong problem-solving skills with the ability to work independently. Experience with RESTful APIs and API design. Familiarity with SPA frameworks and modern web application architecture. Good communication skills and ability to work collaboratively with technical teams. A willingness ...

functional programming experience. Experience working in Agile development teams. Strong problem-solving skills with the ability to work independently. Experience with RESTful APIs and API design. Familiarity with SPA frameworks and modern web application architecture. Good communication skills and ability to work collaboratively with technical teams. A willingness ...

functional programming experience. Experience working in Agile development teams. Strong problem-solving skills with the ability to work independently. Experience with RESTful APIs and API design. Familiarity with SPA frameworks and modern web application architecture. Good communication skills and ability to work collaboratively with technical teams. A willingness ...

approach into a repeatable team capability. Building security and observability into the platform from the start. Developing the technical capability of the team through design reviews, mentoring and hands-on leadership. You’ll also line-manage the team and remain accountable for delivery. Those things matter, but the reason … engineering. You won’t be asked to spend six months choosing a stack. The interesting decisions are the ones underneath it: service boundaries, API design, migration sequencing, testing strategy, engineering standards, secure-development practices, observability and how agentic development works across a team. One important constraint: our database ...

Hybrid Build the AI systems our users actually experience. We're looking for a dynamic AI Engineer (5+ years) to design, build, and deploy autonomous, user-facing AI solutions - LLM-powered applications, agentic workflows, and intelligent systems that perform reliably at scale, not just in a demo. What … Degree in Computer Science (or equivalent) with strong AI/ML/NLP foundations Strong Python skills, familiarity with Java/Kotlin, and solid API design experience Hands-on experience with LangChain, LangGraph, and LLM APIs (OpenAI, Anthropic, etc.) Skilled in prompt engineering and orchestrating AI agents/ ...

/day (Inside IR35) Duration: 6 Months Sector: Public Sector Opportunity Overview We are seeking an expert Senior Technical Architect to lead the design and delivery of enterprise-scale systems across key operational domains (People, Finance, Commercial, or Estates). You will bridge the gap between complex technical strategy … delivery, translating user needs into robust, value-for-money solutions while championing architecture standards at governance forums. Key Responsibilities Solution Design: Create enterprise-level architecture patterns using microservices, APIs, event-driven design, and file-based transfers. SaaS Strategy: Lead Software-as-a-Service (SaaS) product selection, evaluation ...

translate business requirements into practical technical solutions. Define integration approaches, APIs and data flows between enterprise platforms and business systems. Support architecture governance, technical design reviews and solution assurance activities. Ensure solutions meet security, scalability, resilience and operational support requirements. Work collaboratively with internal stakeholders, delivery teams and third … party suppliers throughout the project lifecycle. Contribute to architecture standards, best practice and reusable design patterns. About You We're looking for an experienced Solution Architect with broad technical knowledge rather than a specialist in a single discipline. You'll be comfortable engaging with both technical and non-technical ...

models and integration patterns Reviewing significant technical initiatives and providing architectural guidance across multiple engineering teams Embedding security, resilience, scalability and observability into platform design from the outset Identifying architectural risk, technical debt and platform constraints Partnering with Engineering and Product leadership on strategic technical decisions Influencing engineering teams … experience defining architecture across SaaS, product-led or platform-based environments Experience working across complex, multi-system or distributed technology landscapes Strong understanding of API design, integration architecture and service-oriented systems Cloud architecture experience, ideally within Azure A strong appreciation for security-by-design, resilience, scalability ...

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 ...

technical challenges. Identifying appropriate technologies and approaches for different customer requirements. Developing cloud-native applications and services. Contributing across the full delivery lifecycle, from design and development through to deployment and operational support. Identifying innovative ways to solve complex engineering and business problems. Working collaboratively with software engineers, cloud … following areas would be advantageous: AWS Associate-level certification, such as AWS Solutions Architect, AWS Developer or AWS DevOps Engineer. Microservices architecture and API design. Docker and container platforms including Kubernetes, Amazon EKS or Amazon ECS. AWS operational concepts, including monitoring, observability and FinOps. CI/CD tooling such ...

between Coupa and SAP S/4HANA. This is an opportunity to work on a high-profile global programme, owning integration architecture from initial design through to deployment, cutover and Hypercare. What you'll be doing: Designing and delivering Coupa SAP S/4HANA integrations across complex enterprise landscapes … Leading integration architecture, solution design and technical delivery Building and managing APIs including REST/JSON, OData, IDocs and BAPIs Supporting procurement process integrations covering: Supplier and Business Partner data Purchase Orders Goods Receipts Service Entry Sheets Invoices and payment status updates Master data synchronisation Working with integration platforms ...