26 to 50 of 138 API Development Jobs in the UK excluding London

Greater Manchester My client is hiring for a .NET Developer to work on new and evolving products used by major UK brands. You will be involved in the full development lifecycle, from system design and implementation to deployment and optimisation. This is a hands-on technical role focused on scalable API development, cloud integration, and continuous delivery. … Building and maintaining services using ASP.NET Core, C#, MVC, and Razor Designing and integrating RESTful APIs for both internal and third-party systems Writing tested, maintainable code using modern development practices Working across SQL Server for data design and access Collaborating within Agile teams using sprints or Kanban Deploying to cloud platforms (primarily Azure ) using CI/CD pipelines … Requirements 5+ years of .NET development experience , with full-stack exposure Practical experience with ASP.NET Core, C#, Web API, HTML/CSS/JavaScript Strong understanding of software design principles (SOLID, design patterns) Experience with Git , version control workflows, and CI tools Exposure to cloud technologies , ideally Azure (App Services, DevOps, etc.) Bonus if you’ve worked with More ❯

Senior Backend Developer (Node.JS) I'm looking for an experienced backend senior developer to support API development and backend delivery for a high-traffic consumer platform. You’ll work alongside front-end engineers to build scalable, secure, and performant systems using modern tools and AI-assisted development. You’ll be a good fit if you: Deliver production-ready … APIs fast and independently Have proven experience with consumer-facing platforms Use AI coding tools (Cursor, Claude Code, Codex, or similar) to speed up development Make confident technical decisions with minimal guidance Follow clear architectural standards and established development patterns Understand backend performance, scalability, and security at production scale Build reliable, maintainable APIs and data systems Collaborate effectively … mentoring Anyone without production experience in consumer-facing systems Those who avoid AI coding tools Core Technical Requirements: Node.js (extensive production experience) - this is key, you must have RESTful API design and development (production experience) Database design and optimization (SQL and/or NoSQL) Authentication, authorization, and security best practices AI coding tools (GitHub Copilot, Claude, Cursor, or More ❯

Work With: Our client is a leading global technology and engineering solutions company, delivering next-generation digital transformation initiatives. You will work as part of a high-performing Agile development team focused on building a credit decisioning engine powered by scalable microservices and cloud-native solutions. About the Role: As a Java Fullstack Engineer , you will play a pivotal … and frontend features focused on performance and reliability. Work closely with architects and product owners to define and implement technical solutions aligned with business goals. Required Skills & Experience: Backend Development: 8–15 years of experience with Java, Spring Boot , and microservices architecture . Java 17: Hands-on experience is mandatory . DevOps & Cloud: Proven experience with GCP , AWS , or … Azure , and familiarity with CI/CD pipelines . API Development: Expertise in RESTful API design and development. Frontend: Working knowledge of ReactJS or Angular . Testing: Strong background in automated testing , including JUnit . Mindset: Excellent communication skills and a commitment to continuous learning in a collaborative Agile environment. Good to Have: Experience with GCP Data More ❯

range of £40,000 - £50,000 The chance to contribute to an organisation making a meaningful social impact. Working within a supportive and mission-driven environment. Opportunities for professional development and career progression. Key Responsibilities Design, development, and implementation of modern, web-based applications. Drive improvements across codebases, development practices, and deployment processes. Build and manage APIs … and cloud platforms. Work within Agile and DevOps methodologies to deliver high-quality solutions. About You Proven experience in software development with expertise in C#, .NET, Azure, and SQL . Strong background in API development, cloud adoption frameworks, and modern architectures. Excellent problem-solving skills with the ability to thrive under pressure. Skilled in CI/CD More ❯

range of £40,000 - £50,000 The chance to contribute to an organisation making a meaningful social impact. Working within a supportive and mission-driven environment. Opportunities for professional development and career progression. Key Responsibilities Design, development, and implementation of modern, web-based applications. Drive improvements across codebases, development practices, and deployment processes. Build and manage APIs … and cloud platforms. Work within Agile and DevOps methodologies to deliver high-quality solutions. About You Proven experience in software development with expertise in C#, .NET, Azure, and SQL . Strong background in API development, cloud adoption frameworks, and modern architectures. Excellent problem-solving skills with the ability to thrive under pressure. Skilled in CI/CD More ❯

and commercial customers. WHAT WILL YOU BE DOING? As a result of some exciting programme wins, we currently have a permanent vacancy for a Software Engineer to support the development and transition into live of a new IT application and infrastructure solution providing support to a critical operational end user. The Software Engineer will provide input and expertise to … maintain alignments with best practices and recommending system/code/process improvements. They will also support the development of junior Software engineers in the program/team. This individual is expected to create an environment for innovation and technical mentoring. You will be self-motivated and be able to work autonomously to achieve day to day objectives with … sprint Communicate effectively across organisational, technical and political boundaries, understanding the context of the delivery WHO DO WE NEED? We are looking for someone with excellent organisation, communication and development skills who has: Experience with agile software development methodologies, working in a scrum team, estimation, ticket creation and management, engagement in demos, retrospectives and continuous process improvement Understanding More ❯

benefits I am seeking a Senior .Net Developer to work for a fantastic business based in the heart of South Wales. The organisation are putting together a new software development, QA and DevOps team and the successful Senior .Net Developer will be at the heart of the technical decision-making on a string of exciting greenfield projects. The right … Senior .Net Developer will have demonstrable experience of working in an Agile Development team, and will have excellent skills in .Net and C#. You will have excellent knowledge and experience of API development, and will have skills in Azure. The right person for this role will receive the following benefits: Salary of up to 56K DOE Employer … pension contribution of up to 9% 25 days holiday Discount schemes Excellent training and development The successful Senior .Net Developer will have the following skills and attributes: Strong skills in .Net C# Development Understanding of Event-Driven Development (Azure Event Hubs, Service Bus, Event Grids) Building and consuming APIs using Azure Dev Ops Agile Development experience More ❯

benefits I am seeking a Senior .Net Developer to work for a fantastic business based in the heart of South Wales. The organisation are putting together a new software development, QA and DevOps team and the successful Senior .Net Developer will be at the heart of the technical decision-making on a string of exciting greenfield projects. The right … Senior .Net Developer will have demonstrable experience of working in an Agile Development team, and will have excellent skills in .Net and C#. You will have excellent knowledge and experience of API development, and will have skills in Azure. The right person for this role will receive the following benefits: Salary of up to £56K DOE Employer … pension contribution of up to 9% 25 days holiday Discount schemes Excellent training and development The successful Senior .Net Developer will have the following skills and attributes: Strong skills in .Net C# Development Understanding of Event-Driven Development (Azure Event Hubs, Service Bus, Event Grids) Building and consuming APIs using Azure Dev Ops Agile Development experience More ❯

work with your colleagues, stakeholders and third parties, to align on requirements and deliver a user experience you can be proud of. The role requires demonstrable experience of backend development using PHP and MySQL, and includes full lifecycle development of RESTful APIs and web apps which can operate at scale on AWS. You will appreciate the benefits of … Experience of software architecture and presenting technical designs to your team and stakeholders. Excellent communicator with a self-starter attitude and comfort working autonomously. Demonstrable expertise and understanding of API development/design and experience interfacing with disparate systems. Applicable understanding of software security, common exploits and secure development practices, including the OWASP Top 10. Proven and More ❯

superb facilities. About the role: Are you passionate about driving digital innovation and building robust, scalable systems? Brockenhurst College is seeking a Senior Systems Developer to lead the design, development, and strategic implementation of software solutions that power our digital infrastructure. Responsibilities as our Senior Systems Developer will include: Lead complex systems development projects aligned with our digital … strategy. Provide technical leadership and mentorship to the development team. Design and maintain software systems, ensuring seamless integrations and top-tier user experience. Champion best practices in security, accessibility, and GDPR compliance. Research and implement cutting-edge tools and technologies. Communicate technical solutions clearly to non-technical stakeholders. As our Senior Systems Developer, youll ideally have: Level 5 IT … or development qualification (or equivalent experience). Strong knowledge of Microsoft .NET, C#, HTML, CSS, JavaScript, and T-SQL. Experience in database design, API development, and system integration. Excellent problem-solving and communication skills. Ability to manage multiple projects and support junior developers. Desirable, Postgraduate qualification or Microsoft Azure certification. Desirable, Experience with MIS platforms, RESTful APIs More ❯

frameworks. Collaborate with architects, testers, and cyber security teams to ensure compliance and resilience. Essential Skills & Experience Node.js (advanced) – event-driven architecture, async programming TypeScript – strongly typed, enterprise-grade API development Express.js or NestJS – RESTful and modular service design Security-first development – OAuth2, JWT, TLS, secure logging Containerisation – Docker, Kubernetes, or OpenShift CI/CD – GitLab CI More ❯

frameworks. Collaborate with architects, testers, and cyber security teams to ensure compliance and resilience. Essential Skills & Experience Node.js (advanced) - event-driven architecture, async programming TypeScript - strongly typed, enterprise-grade API development Express.js or NestJS - RESTful and modular service design Security-first development - OAuth2, JWT, TLS, secure logging Containerisation - Docker, Kubernetes, or OpenShift CI/CD - GitLab CI More ❯

frameworks. Collaborate with architects, testers, and cyber security teams to ensure compliance and resilience. Essential Skills & Experience Node.js (advanced) - event-driven architecture, async programming TypeScript - strongly typed, enterprise-grade API development Express.js or NestJS - RESTful and modular service design Security-first development - OAuth2, JWT, TLS, secure logging Containerisation - Docker, Kubernetes, or OpenShift CI/CD - GitLab CI More ❯

AI Solutions Engineer AI Solutions, B2B, B2C, Azure, AI Foundry, Open-AI, Microsoft Copilot Studio, Machine Learning, Python, TensorFlow, PyTorch, scikit-learn, Large Language Models, LLM, Data preprocessing, REST API, Microservices architecture, MLOps, CI/CD for ML, Power-BI, Docker, Kubernetes, AI Ethics, Cloud Platforms, AWS, Google Cloud Platform, SQL, NoSQL, DevOps, Financial services, Regulatory environments Contract Type … Hybrid/Bedford Daily Rate: £600-£650 (via Umbrella) 9 months initial contract We are seeking two AI Solutions Engineers to lead the design, development, and deployment of AI solutions. This hands-on technical role focuses on building scalable AI-powered services for both B2B and B2C applications. The successful candidates will work under the coordination of the Lead … Open-AI services, and Microsoft Copilot Studio. Collaborate with cross-functional teams to integrate AI technologies into business processes and consumer applications. Manage the full lifecycle of AI solution development from concept to deployment and maintenance. Utilize programming skills in Python to automate processes and enhance functionality. Work with large datasets for data preprocessing, feature engineering, and model evaluation. More ❯

offers the perfect balance between flexibility and collaboration, with 1-2 days a week spent onsite. As a Senior Software Engineer, youll play a key role in the design, development, and delivery of scalable, high-performance software solutions. Youll work across the full stack, focusing on Node.js and React, while collaborating closely with other developers, architects, and stakeholders to … cloud-based deployments. Key Skills & Experience 5+ years commercial experience with TypeScript/React and Node.js. Proficiency in JavaScript libraries such as React or Next.js. Expert knowledge of REST API development using Node.js. Experience working with C# in enterprise environments. Familiarity with cloud computing, infrastructure as code, and CI/CD pipelines. Experience with automated testing tools such … Vitest Comfortable using Azure DevOPs The Senior Developer will be joining a friendly, agile, and innovative team, based in Birmingham where you will play an integral role in the development of data-rich, user-friendly applications Keywords: Senior Software Engineer, Fullstack Developer, Node.js, React, TypeScript, C#, REST API, NextJS, Jest, Vitest, CI/CD, Azure DevOPs, Birmingham, West More ❯

offers the perfect balance between flexibility and collaboration, with 1-2 days a week spent onsite. As a Senior Software Engineer, youll play a key role in the design, development, and delivery of scalable, high-performance software solutions. Youll work across the full stack, focusing on Node.js and React, while collaborating closely with other developers, architects, and stakeholders to … cloud-based deployments. Key Skills & Experience 5+ years commercial experience with TypeScript/React and Node.js. Proficiency in JavaScript libraries such as React or Next.js. Expert knowledge of REST API development using Node.js. Experience working with C# in enterprise environments. Familiarity with cloud computing, infrastructure as code, and CI/CD pipelines. Experience with automated testing tools such … Vitest Comfortable using Azure DevOPs The Senior Developer will be joining a friendly, agile, and innovative team, based in Birmingham where you will play an integral role in the development of data-rich, user-friendly applications Keywords: Senior Software Engineer, Fullstack Developer, Node.js, React, TypeScript, C#, REST API, NextJS, Jest, Vitest, CI/CD, Azure DevOPs, Birmingham, West More ❯

offers the perfect balance between flexibility and collaboration, with 1-2 days a week spent onsite.As a Senior Software Engineer, you’ll play a key role in the design, development, and delivery of scalable, high-performance software solutions. You’ll work across the full stack, focusing on Node.js and React, while collaborating closely with other developers, architects, and stakeholders … cloud-based deployments. Key Skills & Experience 5+ years’ commercial experience with TypeScript/React and Node.js. Proficiency in JavaScript libraries such as React or Next.js. Expert knowledge of REST API development using Node.js. Experience working with C# in enterprise environments. Familiarity with cloud computing, infrastructure as code, and CI/CD pipelines. Experience with automated testing tools such … Vitest Comfortable using Azure DevOPs The Senior Developer will be joining a friendly, agile, and innovative team, based in Birmingham where you will play an integral role in the development of data-rich, user-friendly applications Keywords: Senior Software Engineer, Fullstack Developer, Node.js, React, TypeScript, C#, REST API, NextJS, Jest, Vitest, CI/CD, Azure DevOPs, Birmingham, West More ❯

A public sector organisation is looking for a skilled SharePoint Developer to join their Development and Testing team. This is a key role for someone passionate about building high-quality, scalable applications using SharePoint, Microsoft 365, and Azure services. If you enjoy solving complex problems and collaborating across teams to deliver impactful digital solutions, we'd love to hear … governance, and promoting best practices across the organisation. Responsibilities Design and Customize SharePoint Solutions: Develop tailored solutions using SharePoint and M365 product to address specific business requirements Custom SharePoint Development: Create custom SharePoint apps, Teams apps, and web parts using the SPFx framework (React). Additionally, utilize Power Apps, Power Automate, and related technologies. Application Maintenance: Utilize DevOps practices … security of SharePoint environments Configurating and deployment: performing site configuration for new installations, deploying custom features, and staying up to date with the latest SharePoint developments and upgrades. Secure Development Practices: Developing clean, reusable, scalable, and maintainable code following the Software Development Life Cycle (SDLC). Conducting peer code reviews upon request and adhering to development coding More ❯

security, performance and CI/CD processes. Responsible for documenting all solutions, produced to agreed team standards. Demonstrate a willingness to learn and further technologies & techniques embraced by the development team. Cultivate strong working relationships both within working squad and in HL as a whole. Actively participating in working groups and communities of practice designed to support the development … defining integration patterns, abstracting vendor APIs/data models from internal downstream services etc. Experience with CI/CD and Trunk Based Development. Understanding of Microservices & principles of RESTful API development, including structuring, documenting, versioning, testing and stubbing/mocking. Understanding of event driven architecture. Experience performing code reviews. Experience operating within Agile framework. Aware of website performance … implications, best practices and other non-functional requirements. Able to write, assist in writing or reviewing technical documentation. Advocate of excellent development practices to optimise for rapid and continuous delivery of client value. React Native, GraphQL and DevOps experience beneficial Skills/Attributes Excellent collaborator, naturally works well with others across different disciplines in a cross functional team. Excellent More ❯

security, performance and CI/CD processes. Responsible for documenting all solutions, produced to agreed team standards. Demonstrate a willingness to learn and further technologies & techniques embraced by the development team. Cultivate strong working relationships both within working squad and in HL as a whole. Actively participating in working groups and communities of practice designed to support the development … defining integration patterns, abstracting vendor APIs/data models from internal downstream services etc. Experience with CI/CD and Trunk Based Development. Understanding of Microservices & principles of RESTful API development, including structuring, documenting, versioning, testing and stubbing/mocking. Understanding of event driven architecture. Experience performing code reviews. Experience operating within Agile framework. Aware of website performance … implications, best practices and other non-functional requirements. Able to write, assist in writing or reviewing technical documentation. Advocate of excellent development practices to optimise for rapid and continuous delivery of client value. React Native, GraphQL and DevOps experience beneficial Skills/Attributes Excellent collaborator, naturally works well with others across different disciplines in a cross functional team. Excellent More ❯

paced, collaborative environment and grow your skills. Key Responsibilities: Develop and maintain scalable applications using Python (Django). Build and integrate APIs and third-party services. Participate in Agile development cycles and CI/CD processes. Optimize applications for performance and scalability. Collaborate with cross-functional teams. Requirements: Computer Science or STEM degree from a top Russell Group University … 1st or 2:1). 5+ years of full-stack development experience (Python/Django). Strong experience with SQL databases (PostgreSQL/MySQL). Familiarity with DevOps tools (Docker, Kubernetes, AWS/GCP/Azure). Experience with API development and Git. More ❯

scalable solutions from the ground up, and work closely with clients to solve meaningful business problems. You'll operate in small project teams (or sometimes independently), across the full development lifecycle from business requirements through to deployment and optimisation. Key Responsibilities Design, develop, and deliver high-quality software solutions in line with client needs and business goals Lead or … architecture, offering input into technology and design decisions Collaborate directly with clients to understand their operations and challenges Work across the full stack - backend through to frontend using modern development practices Take ownership of project delivery with an awareness of budgets and timelines Apply a problem-solving mindset and adapt quickly to different industries and business domains Core Technical … Skills Required C#/.NET (Core and Framework) strong backend development experience essential JavaScript and React for building responsive, user-friendly front-end applications Familiarity with API development (RESTful services) Experience with SQL Server and database integration Comfortable working in DevOps environments (CI/CD pipelines, version control, automated testing) Strong understanding of application architecture and scalable More ❯

Boot and JUnit Apply Kubernetes for containerisation and deployment Collaborate within Agile Scrum teams to deliver high-quality software solutions Write clean, maintainable code following best practices in secure development Support continuous integration, testing, and deployment activities Essential Skills & Experience Strong hands-on experience with Java and Spring Boot Solid understanding of REST API development and JSON More ❯

to technology-driven innovation, in support of their efforts to strengthen their growing SaaS team. They are looking for a senior software engineer with strong experience in full-stack development using Go & JavaScript. This is a remote role, and it must be noted that all candidates are required to be based in the UK with full eligibility to work … remove bottlenecks, and ensure smooth operation in production environments. Maintain high engineering standards through structured, well-organised code and effective use of automation. Required experience: Senior-level full-stack development, with expertise in multiple languages & frameworks (namely Go, JavaScript, React, Angular, .NET). API development & integration, microservices, cloud services, and DevOps practices. Agile methodologies with experience in More ❯

to technology-driven innovation, in support of their efforts to strengthen their growing SaaS team. They are looking for a senior software engineer with strong experience in full-stack development using Go & JavaScript. This is a remote role, and it must be noted that all candidates are required to be based in the UK with full eligibility to work … remove bottlenecks, and ensure smooth operation in production environments. Maintain high engineering standards through structured, well-organised code and effective use of automation. Required experience: Senior-level full-stack development, with expertise in multiple languages & frameworks (namely Go, JavaScript, React, Angular, .NET). API development & integration, microservices, cloud services, and DevOps practices. Agile methodologies with experience in More ❯