26 to 50 of 108 API Development Jobs in the UK

journey. This role is ideal for someone who is comfortable working with existing technologies while contributing to the modernisation of critical banking systems. The position spans the full software development life cycle, with core technologies centred on Java and React, and suits a developer who values building robust, scalable solutions rather than focusing on the latest trends. The successful … to collaborate closely with Senior Java and React Developers, UI/UX specialists and Agile Transformation functions to help architect and deliver applications in line with best design and development practices. Operating in an Agile/Scrum environment, they will be adept at producing clean, testable and maintainable code and will demonstrate strong analytical skills, technical problem-solving ability … and an understanding of development excellence within the constraints of a regulated banking environment. This role requires full-lifecycle engineering capability, including functional and non-functional analysis, application architecture and design, coding and unit testing, documentation, manual and automated testing, and support for continuous integration, testing and delivery. The developer will also be expected to write Agile epics and 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 ❯

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 ❯

automation opportunities. Skilled in creating process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. Python Development - Strong proficiency in Python programming including object-oriented design, asynchronous programming, error handling, and writing clean, maintainable code. Experience with key libraries including Pandas, NumPy for data manipulation, requests … in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework for exposing AI models and automation services. Experience with API authentication … OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing for information extraction, document classification, and building end-to-end pipelines for automated document ingestion, processing, and data More ❯

Actions, CI/CD pipelines Standards: FHIR, HL7, SNOMED CT (training available) What We're Looking For Solid commercial experience with PHP and Laravel Experience with React.js for frontend development Strong understanding of API development and relational databases Exposure to cloud platforms or containerisation is a bonus Passion for building technology that improves healthcare and patient outcomes More ❯

experience developing with C#.NET. Ideal candidates have led enhancements, maintenance, or improvements of existing systems. This position is especially suitable for those with hands-on experience in financial system development or financial IT consulting. Employment Type: Full-time, Permanent Salary: £40k-£65k depending on experience Start Date: Negotiable Working Hours: Monday to Friday, 9:00–17:00 Location: Central … manage, and optimise databases such as SQL Server Propose and implement improvements or new functionalities for existing systems Coordinate with internal and external stakeholders Financial Systems Developer Ideal Candidate: Development experience with C#.NET (3+ years preferred) Experience with SQL and database operations Knowledge of financial systems or financial operations (e.g., payments, settlements, reporting) is a plus Team development experience (familiarity with version control tools such as Git) Business-level English or above Preferred Skills/Experience: Professional experience in the financial industry Web API development experience (REST, SOAP, etc.) Development experience in cloud environments (Azure, AWS) If your application is successful, we will contact you within two business days. Due to the volume of 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 ❯

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 ❯

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 ❯

with deploying, configuring, and managing cloud architecture and technologies in AWS environments. Experience with web application services such as NGINX, Apache, JBoss. Experience of Test Driven or Behaviour Driven development, and being able to implement automated test solutions using Robot, Selenium etc API development and integration (preferably using Go but not essential). Knowledge of OpenShift Containerisation 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 ❯

compliance with secure coding practices and defence standards. This is an exciting opportunity to work on mission-critical software that underpins naval operations, applying your expertise in Java , Agile development , and system modelling to deliver robust, scalable solutions. Location: Dorset On-site: Hybrid (3 days per week) Seniority: Senior (5+ years experience) Clearance: Eligible for SC Clearance Key Responsibilities … interoperability. Collaborate with cross-functional teams to ensure compliance with defence standards and security requirements . Participate in system design and architecture reviews using Enterprise Architect . Apply Agile development practices and contribute to continuous improvement initiatives. Qualifications Required Skills Strong proficiency in Java and REST API development . Experience with IntelliJ IDEA and Atlassian toolset ( Jira … in multi-disciplinary environments . Strong problem-solving and analytical mindset. Desirable Skills Familiarity with CI/CD pipelines and containerisation technologies (e.g., Docker). Experience with secure software development lifecycle . Knowledge of Defence domain processes and safety-critical standards . Required Qualifications Must be eligible for or already hold UK Security Clearance (SC) Bachelors or Masters degree 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 ❯

support systems to a high standard of security, scalability and performance. Ideal candidates will have demonstrable experience working at a senior level across the full stack within a web development team, with keen attention to detail and strong problem-solving skills. Key duties and responsibilities Design, develop, test and maintain complex PHP web applications and APIs to deliver secure … focus on security, accessibility and delivering a great user experience Mentor more junior developers, engaging in code reviews and encouraging best practise Provide input on key technology, architectural and development decisions Key skills and experience Extensive experience with web application & API development at a senior level is essential Expert understanding of microservice architecture is essential Expert knowledge More ❯

architecture and support business-critical applications. This is a highly collaborative role for someone with a passion for software craftsmanship and continuous improvement. Using your 5+ years of backend development experience, you'll enhance core product features, design scalable systems, and work closely with relevant stakeholders to deliver technical solutions that drive real value. Beyond your individual contributions, you … ll mentor junior developers, champion best practices, and drive meaningful improvements in our development processes and tools. This is an opportunity to make a real impact; both through the systems you build and the team culture you help shape. As a Senior Backend Developer, your key responsibilities include; Enhance features and functionality of core products Design and implement scalable …/BDD principles Create and maintain RESTful and GraphQL APIs Collaborate with POs, BAs, and stakeholders to define solutions Mentor junior developers and promote best practices Drive improvements in development processes and tools What you'll bring You're an experienced backend developer with a solid foundation in modern software engineering practices. You understand what it takes to build More ❯

architecture and support business-critical applications. This is a highly collaborative role for someone with a passion for software craftsmanship and continuous improvement. Using your 5+ years of backend development experience, you'll enhance core product features, design scalable systems, and work closely with relevant stakeholders to deliver technical solutions that drive real value. Beyond your individual contributions, you … ll mentor junior developers, champion best practices, and drive meaningful improvements in our development processes and tools. This is an opportunity to make a real impact; both through the systems you build and the team culture you help shape. As a Senior Backend Developer, your key responsibilities include; Enhance features and functionality of core products Design and implement scalable …/BDD principles Create and maintain RESTful and GraphQL APIs Collaborate with POs, BAs, and stakeholders to define solutions Mentor junior developers and promote best practices Drive improvements in development processes and tools What you'll bring You're an experienced backend developer with a solid foundation in modern software engineering practices. You understand what it takes to build More ❯

At Neptune, we believe great technology starts with great people. We're looking for a Software Development Team Leader to guide and inspire a skilled team of developers, driving technical excellence and innovation across our software platforms. You'll lead the end-to-end software development lifecycle - from project planning through to deployment - ensuring our systems are robust … scalable, and built to the highest quality standards. Working in an Agile environment, you'll help shape the team's technical direction and development practices while fostering collaboration and continuous improvement. Whether you're an established Team Leader or a senior developer with proven leadership experience looking to take the next step, we'd love to hear from you. … setting, ensuring quality, timeliness, and alignment with business priorities. Provide technical leadership, guiding architectural decisions and promoting best practices in coding, design, and testing. Manage relationships with third-party development service providers, ensuring quality delivery, clear communication, and alignment with Neptune's standards. Conduct code reviews and champion continuous improvement across tools and processes. Collaborate closely with QA, UX More ❯

environments with tight security controls Experience integrating AI or ML services into real-world applications Knowledge of authentication, secret management, networking, and model access governance Bonus Points For: Kong API Gateway, Kong Mesh, Flux CD AWS stack: EC2, EKS, S3, SQS, DynamoDB, Bedrock RESTful API development with FastAPI, microservices, Terraform, GitOps workflows Prompt evaluation tools such as More ❯

environments with tight security controls Experience integrating AI or ML services into real-world applications Knowledge of authentication, secret management, networking, and model access governance Bonus Points For: Kong API Gateway, Kong Mesh, Flux CD AWS stack: EC2, EKS, S3, SQS, DynamoDB, Bedrock RESTful API development with FastAPI, microservices, Terraform, GitOps workflows Prompt evaluation tools such as More ❯

/BDD principles Create and maintain RESTful and GraphQL APIs Collaborate with POs, BAs, and stakeholders to define solutions Mentor junior developers and promote best practices Drive improvements in development processes and tools What You Bring 5+ years of backend development experience Expertise in C#, .NET (preferably .NET 6+), and SQL Server Deep understanding of SOLID and OOP … principles Skilled in Git, Unit Testing (NUnit), and API development Familiarity with CI/CD pipelines and agile methodologies Strong communication and problem-solving skills Desire to grow within a dynamic and evolving team Why Join? This is an incredible opportunity to make your mark in a company that prioritises purpose, innovation, and professional growth. You'll be … part of a team where your ideas are welcomed, your development is encouraged, and your work truly matters. Ready to build something that helps others-and builds your career in the process? Apply today. 48954MSR2 INDMANS More ❯

testing, and implementing modern microservices-based applications running in the public cloud. This is a hands-on position within a feature team that works collaboratively across the full software development lifecycle. What You'll Be Doing Designing, producing, testing, and implementing high-quality software across the system lifecycle Working within a permanent feature team focused on delivering business-critical … in a fast-paced Agile environment (two-week sprints) Collaborating with architects, principal engineers, and key stakeholders to align technical solutions with business objectives Applying Agile and Test-Driven Development (TDD) principles to build resilient, fast-running, and maintainable code Building and maintaining API-driven Java microservices hosted on public cloud infrastructure Contributing to intentional architecture while supporting … Proven ability to design and deliver well-tested, production-ready software with strong focus on functional and non-functional requirements Deep understanding of microservices architecture, cloud-native applications, and API development Experience with distributed systems - managing workloads at scale using modern practices for availability, performance, and observability Knowledge and experience with Test-Driven Development (TDD) and automated More ❯

As an Application Developer your responsibilities will be to: Maintain and enhance existing in-house applications Develop new features and tools to agreed requirements Scope, estimate, schedule, and communicate development work Ensure solutions comply with IT security and ISO27001 standards Identify and deliver system improvements Collaborate with the Senior Developer and wider data team Too be successful as the … Application Developer you will need: C#, .NET Core, OO development, repository pattern, unit testing Windows Forms experience Strong MS SQL Server skills (T-SQL, stored procedures, functions) Database design and development Git or similar source control Debugging, problem-solving, writing documentation PowerShell scripting, API development Microsoft Access (structure, design, VBA) SSRS, SSIS Excel (Power Query, formulas … VBA) Power BI Beneficial: web development Strong communication, time management, and analytical skills Ability to manage small medium development projects Quick learner, self-motivated, strong team player Ability to support and guide others Helpful: knowledge of Data Protection principles To achieve the higher salary, you will need to demonstrate your ability to meet the key criteria s of More ❯