1 to 25 of 64 API Design Jobs in England

Promote and practice best development approaches such as Test-Driven Development (TDD) and Behavior-Driven Development (BDD) to deliver high-quality, maintainable code. Apply design patterns to address complex problems, ensuring code is efficient, readable, and reusable. Adhere to IT and Information Security policies and procedures in all engineering … Your Profile Essential skills/knowledge/experience: Preferred - Experience of building distributed scalable microservices using Java/Kotlin, Spring Boot, OAuth 2.0, Secure API design Understanding of API design for mobile application with event driven architecture Strong analysis and problem-solving skills Knowledge ...

office) About the Role We're looking for a Senior Application Engineer with strong backend and cloud development expertise to help design and build scalable, secure services that power Internal Platforms. What You'll Do Design and build scalable backend services and APIs supporting mobile and event-driven … requirements through deployment and maintenance Provide technical guidance and mentorship to engineers within the team Promote best practices such as TDD, BDD, and secure API design Collaborate with technical leads, IT teams, and business stakeholders to deliver high-quality solutions Apply design patterns and engineering best practices ...

London office About The Client: Our client is a rapidly growing Infrastructure-as-a-Service (IaaS) provider driving digital transformation. Key Responsibilities: Architecture & System Design Design and evolve scalable backend services and product components. Make sound architectural decisions across APIs, services, and data layers. Lead delivery from design … high coding standards and test coverage. Contribute to code reviews and documentation. Mentor engineers and support technical growth. Collaboration Work closely with Product and Design to deliver scalable solutions. Communicate technical trade-offs and manage cross-team dependencies. Essential skills and requirements: Strong experience building production backend systems ...

development aligns with OWASP secure coding standards Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Collaborating with UI/UX teams using Figma prototypes Maintaining high-quality technical documentation Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core … Entity Framework Core RESTful API design/OpenAPI/Swagger Angular 21 (mandatory) TypeScript/RxJS DevExpress DevExtreme v25 (mandatory) Microsoft Azure (App Services, SQL, Storage) Azure Entra ID Azure Key Vault Infrastructure as Code (Bicep preferred) CI/CD pipelines (Azure DevOps or equivalent) Bitbucket (Git) What ...

scale - component lifecycle, rendering behaviour, and bundle architecture are instincts - TypeScript mastery in strict mode - complex generics, discriminated unions, conditional types, and type-safe API boundary design - Vite and modern build tooling; tree-shaking, chunk strategy, module federation, and build performance optimisation in CI - State management at scale … composite lifecycle, memory profiling, GC pressure, and long-task detection - WebGL, Canvas, or custom rendering engine for high-density, real-time financial data visualisation - Design system ownership - token architecture, component API design, versioning strategy, and cross-team adoption at scale - Testing discipline: unit, integration, E2E (Playwright/ ...

scale - component lifecycle, rendering behaviour, and bundle architecture are instincts TypeScript mastery in strict mode - complex generics, discriminated unions, conditional types, and type-safe API boundary design Vite and modern build tooling; tree-shaking, chunk strategy, module federation, and build performance optimisation in CI State management at scale … composite lifecycle, memory profiling, GC pressure, and long-task detection WebGL, Canvas, or custom rendering engine for high-density, real-time financial data visualisation Design system ownership - token architecture, component API design, versioning strategy, and cross-team adoption at scale Testing discipline: unit, integration, E2E (Playwright/ ...

developer to support the development and deployment of the AWS Professional Supply Chain Command Centre solution. This role will focus on backend service development, API design, event tracking, and analytics integration across supply chain flows involving suppliers, manufacturing, and distributors. Location: London, UK (Hybrid) Contract role … experience in AWS backend development (Node.js, Lambda, ECS, Step Functions). Strong understanding of supply chain processes and event-driven architectures. Experience with API design, CI/CD pipelines, and AWS services like Neptune, RDS, DynamoDB, and S3 Familiarity with analytics tools and KPI frameworks for supply chain ...

built. You'll also play a mentorship role - raising the engineering bar across the team and championing Responsible AI practices as we scale. Responsibilities Design scalable, secure, and fault-tolerant full-stack architectures that seamlessly blend traditional web services with generative AI components, ensuring high availability and resilience across … cost-optimised use of Azure AI APIs, GPU compute, and container orchestration resources Set the standard for code quality through comprehensive code reviews, technical design documents, and architectural decision records; mentor junior and mid-level engineers to grow their capabilities hampion Responsible AI practices including model evaluation, bias monitoring ...

etc. Required certifications of UKG Pro and Legion Good experience of integrations work, to and from UKG and Legion solutions with Data translation and API mappings Good Experience creating custom reports from UKG and Legion data. Good experience of working in agile software development teams with an emphasis … self-organization Experience of building extensions of UKG Pro and Legion Understanding of API design. API 1st mindset, REST API design Understanding of event-based architecture ...

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 ...

SoftwareDeveloper(API Development/Backend Node.js, C#, Fullstack) Birmingham, West Midlands (Hybrid 1 day onsite a week) 55k + Benefits Were partnering with a leading enterprise software house in Birmingham that is expanding its engineering team. Theyre looking for a Software Engineer with strong API and backend development … power enterprise software products. Youll work primarily with Node.js and C#, collaborating with cross-functional teams to deliver well-architected, maintainable solutions. Key Responsibilities Design, build, and maintain RESTful APIs and backend systems. Develop high-quality, scalable code using Node.js and C#. Collaborate with product and engineering teams ...

Software Developer (API Development/Backend – Node.js, C#, Fullstack) Birmingham, West Midlands (Hybrid – 1 day onsite a week)55k + BenefitsWe’re partnering with a leading enterprise software house in Birmingham that is expanding its engineering team. They’re looking for a Software Engineer with strong API … enterprise software products. You’ll work primarily with Node.js and C#, collaborating with cross-functional teams to deliver well-architected, maintainable solutions. Key Responsibilities Design, build, and maintain RESTful APIs and backend systems. Develop high-quality, scalable code using Node.js and C#. Collaborate with product and engineering teams ...

. You will be responsible for:- Providing expert level technical direction for complex MarTech projects involving AEM, AEP, Adobe Target, and related integrations. Leading design, development, and implementation efforts across multiple platforms. Leading services and direction, providing technical expertise and completing complex development, design, implementation, architecture design … following skills, then LETS TALK! Full stack development background with Java, JavaScript, HTML, CSS, SQL and modern frameworks Familiarity with microservice architecture, API design, and integration patterns Knowledge of AWS services and cloud-based deployment models Strong understanding of CI/CD pipelines (GitHub), OOP/SOLID, Agile ...

properly Were working with a consultancy who need a Cloud Engineer on a contract basis for an upcoming project focused on Azure integration and API delivery Its backend-heavy, API-led work, in an environment where standards, security, and consistency actually matter What youll be doing Designing … reliable Working within platform standards, shared tooling, and governance This isnt just build an endpoint and move on Youll be owning things properly - design, build, deploy, and run. Skills include: Strong Azure experience (compute, data, integration) Solid .NET/C# backend background Good experience with API design ...

Senior Developer, Back End, API, .Net SQL, NW London to £80K (office based role) A Senior Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed … required with expertise in .NET, C#/VB, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities API ...

autonomy over how things get built. You'll also play a mentorship role - raising the engineering bar across the team as we scale. Responsibilities Design scalable, secure, and fault-tolerant full-stack architectures, ensuring high availability and resilience across Azure-hosted environments Architect robust backend services in Python using … modern frameworks (FastAPI, Pydantic), implementing clean API design, efficient data pipelines, and integration patterns within our Azure ecosystem Establish and enforce best practices for the TypeScript/React frontend, ensuring a highly performant, accessible, and intuitive user experience, including real-time interfaces and interactive data visualisations Lead ...

expertise in Corporate Payments and major payment schemes (SEPA, FPS, CHAPS, SWIFT). Regulatory change experience (PSD2/3, ISO 20022, Open Banking). API design, microservices, integration platforms. Cloud experience (AWS/Azure/GCP), DevOps, CI/CD, Docker/Kubernetes. Knowledge of Java, .NET, Python ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

ambiguity and proposing simple, robust solutions Contributing to architectural documentation and decision records Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (iOS & Android) - offline-first design Angular 21 (strict TypeScript) DevExpress DevExtreme (v25) Microsoft Azure … experience with modern Angular (v15+) Hands-on Azure architecture and deployment experience Experience implementing Infrastructure as Code Experience integrating Azure Entra ID Strong REST API design knowledge Experience implementing CI/CD pipelines Security-first mindset with strong attention to detail Ability to work independently within defined architectural ...

Full Stack (Backend) Engineer who thrives on building clean, scalable systems quickly. You’ll play a key role in shaping our backend architecture—from API design and data pipelines to job processing and observability. What You’ll Do Design and build robust backend systems Architect scalable infrastructure … processing, analytics, and event tracking Build internal tooling for rate limiting, quotas, and authentication Design, develop, and maintain APIs and backend services Collaborate closely with product, design, and CX to deliver exceptional features Optimize for performance, security, and scalability Write clean, maintainable, efficient code Stay current with emerging ...

collaboration in a fast-moving startup environment. The RoleTechnical Strategy & Leadership Work alongside the founder to define and evolve the technical roadmap Lead architectural design and critical technology decisions Champion engineering best practices, code quality, and technical excellence Mentor, coach, and grow engineers at all levels Foster a culture … ownership, collaboration, and innovation Backend Architecture & Development Architect, build, and scale backend services and RESTful APIs Design, optimise, and maintain MongoDB database solutions Improve system reliability, performance, and scalability Resolve complex production issues with robust solutions Implement microservices and modern backend patterns Collaboration & Delivery Partner with Product, Design ...

Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...

Stack Developer - Remote - Competitive Salary I'm working with an exciting organisation that is looking to appoint a Senior Full Stack Developer to help design and deliver secure, cloud-native applications within a modern Microsoft and Azure ecosystem. This is an excellent opportunity for an experienced full-stack engineer … maintaining unit and frontend tests (NUnit and ViTest) Contributing to CI/CD pipeline improvements and secure deployment practices Participating in architecture and technical design reviews Ensuring all development aligns with OWASP security best practices Tech Stack & Environment Core technologies: .NET 10/ASP.NET Core Angular 21 (mandatory) DevExpress ...