1 to 25 of 291 API Development Jobs in the UK

/CD processes • Investigate and resolve technical issues, defects, performance problems and production incidents • Address security, accessibility, privacy, resilience, scalability and performance throughout the development lifecycle • Contribute to technical documentation, knowledge sharing, development standards, patterns and best practices • Support an inclusive engineering culture and mentor colleagues where appropriate … Experience with RESTful APIs and integration with external or internal services Experience with automated unit and integration testing Experience using Git and modern software development workflows Understanding of clean code, modularity, maintainability, version control and design patterns Experience diagnosing and resolving application defects, performance issues and production problems Understanding ...

Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A 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 in house … required with expertise in Visual Basic .NET, C#, 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 ...

Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A 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 in house … required with expertise in Visual Basic .NET, C#, 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 ...

responsible for designing, developing and maintaining software solutions that support the continued evolution of the Lima platform. This role combines full-stack software development with practical experience in AI-assisted software engineering, helping to identify opportunities where AI can improve software quality, developer productivity and innovation. The Software Developer … supports the adoption of AI-assisted development practices across the team, promoting knowledge sharing and encouraging the effective, secure and responsible use of AI technologies throughout the software development lifecycle. Working closely with the Head of Lima Development (technical leadership and delivery), the Product Manager (product strategy ...

integration patterns, standards and best practices across the technology estate Provide technical leadership and guidance to integration engineers and delivery teams Design and support API-led and event-driven integration architectures Develop and maintain APIs, interfaces and integration services connecting source systems, the Accounts platform and downstream consumers … Contribute to technical strategy, architectural decisions and continuous improvement of integration capability Support knowledge sharing, technical mentoring and engineering standards Requirements Strong experience in API and integration development Experience designing and implementing robust integration services Experience with event-driven architectures, event publication, consumption and asynchronous communication Understanding ...

Full Stack Mobile Engineer About the Role We are seeking an experienced Full Stack Mobile Engineer to join our mobile application development team. You will work closely with business stakeholders, product owners, designers, testers and fellow engineers to deliver high-quality digital products used by thousands of learners … driving instructors across the UK. The role has a strong focus on Java backend development, REST API development, database integration and end-to-end software delivery. Experience with Flutter is desirable, while knowledge of AWS and Sitecore would be advantageous. You will take ownership of features from ...

underpin our critical banking services.**MAIN PURPOSE OF THE ROLE**This is a hands‐on engineering role at the intersection of cloud platforms, software development, and AI enablement. You will design, develop, and support bespoke cloud and AI solutions across Azure, Oracle Cloud, and later AWS, applying strong engineering … applying AI services to real-world use cases.* Strong knowledge of IAM, security patterns, governance, and compliance requirements.* **Preferred Experience*** Experience with Azure API Management or similar API gateways.* Exposure to AI governance, model lifecycle controls, or responsible AI implementation in regulated environments.* Knowledge of Foundry, vectorisation patterns ...

technical development, architecture and engineering roadmap for Agile X Build and oversee backend services using Node.js and Express Develop modern frontend experiences using React and Vite Own and evolve the platform's AWS and DynamoDB data architecture Build scalable, modular and API-first systems connecting retail operations, workforce … engineering priorities, sprint planning, testing, documentation and releases Establish engineering standards across code quality, testing and deployment Lead and support engineers, contractors and external development partners Help evolve Agile X towards data visualisation, predictive analytics, automation and AI-assisted operational decision-making Requirements Experienced Senior or Lead Full Stack ...

define technical requirements, make trade-offs and ensure that solutions are both sustainable and maintainable in the long term. Experience with mobile app development, particularly React Native, is a strong plus and a passion for promoting wellbeing and reducing stress through technology is essential. This role requires wearing many … including monitoring and maintenance Passionate about building innovative solutions and thriving as an individual contributor (IC) within a dynamic team Experience with mobile app development (React Native) is a plus, especially for those with strong web frontend experience An interest in reducing stress and promoting wellbeing through technology Experience ...

Contribute to the design, development, and maintenance of business-critical applications, services, and platforms Support continuous improvement of team practices, processes, and ways of working Collaborate across Technology and the wider business to improve systems, streamline processes, and deliver new capabilities Gather, analyse, and document business requirements and translate … them into user stories and technical solutions Design, develop, test, and maintain code for web, mobile, and desktop applications using Agile development practices Investigate, troubleshoot, and resolve production issues, including critical incidents and service escalations Contribute to architectural discussions and technical decision-making for scalable, secure, and maintainable solutions ...

Tech: ASP.NET MVC 5, Restful API, Angular, SQL, Azure Challenge: Greenfield Trading platform, API development, industry specific challenges Firm: Well-known fintech50 business, 10 man flat Dev Team Pay: 75k, Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingLead ASP.NET MVC Developer FintechQuant is urgently … looking for a Lead ASP.NET MVC Developer to join our high profile client. Current challenges include cloud migration, greenfield trading platform development, and bank based API creation. Our client is well known in the WRAP and SIPP market as a full service provider. The environment is that ...

Focus on greenfield development and improvement of existing systems Build REST APIs Engineer microservices Evolve systems supporting card payments, treasury management, transaction booking, and crypto liquidity Develop predominantly with Java 25 on the backend and PostgreSQL Use Spring Boot for delivery Develop business logic with emphasis on clean, maintainable … delivery Collaborate with a talented team to create solutions that drive financial inclusion and transform how people manage money Requirements Demonstrable experience in Backend development, with fluency in Java Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering/Science disciplines Quick learner with ...

looking for a Technical Product Manager to join the API team, driving the product direction. This is a highly technical role, the ideal candidate will have worked in a technical role previously moving in to Product or have a passion for development and understand the structure of API … current and future customer needs (including readiness for AI agents and LLM-based consumption). Key to the role will be working with the API Architect and development team to ensure we are building the right thing at the right time. You will work closely with engineering, product ...

Software Engineer API's and Integration | Java/TypeScript | AWS | APIs Permanent, Market+ Salary and Bonus Location: UK Remote, Home-Based We're looking for an API Software Engineer to join a growing engineering team responsible for building and evolving a critical API platform sitting between customer … enjoys working on APIs, integrations and cloud-native platforms , and wants to play a key role in the evolution from a mature Java-based API platform to a modern TypeScript architecture . The platform is already live and being used by major third parties, with the next phase focused ...

days onsite is mandatory) Rate: £400 - £475 Role Summary We are looking for a highly skilled Application Developer with strong expertise in identity API development, data ingestion and transformation, and event-driven (Pub/Sub) architectures . This role focuses on building secure, scalable identity and access workflows … orchestrate identity provisioning and identity lifecycle management. Build policy-based orchestration workflows for adaptive authentication and contextaware access using industry standards (like OPA). API Development Design, build, and secure RESTful APIs and backend services supporting identity, provisioning, and governance workflows. Integrate APIs with our new authentication service ...

Software Engineer – APIs & Integration | TypeScript | AWS | REST APIs Permanent | Market+ Salary + Bonus UK Remote | Home-Based We're looking for an experienced API Software Engineer to join a growing engineering team building and evolving a critical API platform that sits between customer-facing applications, third parties … Lead and wider technical teams. Designing, developing and maintaining REST APIs used by internal and external customers. Building new functionality using TypeScript and modern API development practices. Developing new API endpoints and services as the platform continues to evolve. Building integrations between external applications, third-party systems ...

MUST BE ELIGIBLE FOR BPSS MUST BE PAYE THROUGH UMBRELLA We are looking for a highly skilled Application Developer with strong expertise in identity API development, data ingestion and transformation, and event-driven (Pub/Sub) architectures. This role focuses on building secure, scalable identity and access workflows … provisioning and identity lifecycle management. Build policy-based orchestration workflows for adaptive authentication and context-aware access using industry standards (like OPA). 2. API Development Design, build, and secure RESTful APIs and backend services supporting identity, provisioning, and governance workflows. Integrate APIs with our new authentication service ...

move code safely into production Write clean, well-tested code using TDD/BDD, unit tests, and integration tests Apply secure coding practices throughout development Help transform organisations and complex business domains through engineering consultancy Requirements 5+ years of Full Stack Engineering experience Experience with React or React Native … Experience with Java and Spring Boot RESTful API design and development Microservices architecture SQL/database technologies TDD, BDD, unit testing, and integration testing GitLab CI/CD pipelines Cloud engineering with AWS Secure coding practices DevOps and continuous delivery Ability to write clean, well-tested code Ability ...

range of well-known clients. You'll work across backend services, APIs and cloud infrastructure, while also having the opportunity to contribute to frontend development where appropriate. Working within a collaborative product team, you'll be involved throughout the software development lifecycle, helping to deliver secure, high-performing … application architecture. Contribute to technical discussions and continuous improvement initiatives. Tech Stack Essential C# .NET/.NET Core TypeScript REST APIs Microsoft Azure Backend Development API Development Desirable React Node.js Azure Functions CI/CD Infrastructure as Code Docker Microservices Headless CMS Cloud-Native Development About ...

Tech: C# .Net, ASP.NET, WPF, MySQL Challenge: Greenfield High Data Throughput platform, API development, industry specific challenges Firm: Well-known fintech50 business, City of London, 10 man flat Dev Team Pay: 80k, Bonus- training budget, Pension, Life/Health, Some Flex Working Development Team Lead Fintech Quant … Lead Developer will Manage the Dev. team including recruitment Build and deliver business requirements Collaborate with Product Owner on defining development requirements and schedule Become enlightened on the system architectureThe environment is that of Facebook or Google, relaxed open with time to think and make the right decisions. ...

Full-Time/Contract TBA Job Summary: We are seeking an experienced Software Developer with strong skills in .NET technologies, Azure cloud services, REST API development, and SQL Server. The ideal candidate will have a proven track record in building scalable business applications, working in Agile teams … both backend and frontend environments. Job Description: We are seeking an experienced Software Developer with strong skills in .NET technologies, Azure cloud services, REST API development, and SQL Server . The ideal candidate will have a proven track record in building scalable business applications, working in Agile teams ...

across the full stack.* A proactive approach to identifying technical improvements and opportunities for innovation. ## Required Skills & Experience### Backend Engineering* Node.js* TypeScript* REST API development* API integrations* broad range of AWS technologies* Event-driven architectures* Middleware frameworks such as Middy* JSON data processing ### Cloud & Infrastructure ...

underpin our critical banking services. MAIN PURPOSE OF THE ROLE This is a hands‐on engineering role at the intersection of cloud platforms, software development, and AI enablement. You will design, develop, and support bespoke cloud and AI solutions across Azure, Oracle Cloud, and later AWS, applying strong engineering … models, and applying AI services to real-world use cases. Strong knowledge of IAM, security patterns, governance, and compliance requirements. Preferred ExperienceExperience with Azure API Management or similar API gateways. Exposure to AI governance, model lifecycle controls, or responsible AI implementation in regulated environments. Knowledge of Foundry, vectorisation ...

Engineering community to develop our data and MLOps capability infrastructure Strong experience in software engineering with proficiency in a language such as Python for API development, data engineering and automation tasks A background in working with storage solutions such as PostgreSQL, MySQL, and BigQuery Experience in API … development using tools such as FastAPI or Flask , enabling data access and integration across systems Solid knowledge of cloud platforms (GCP and/or AWS), with the ability to design and deploy data solutions at scale Experience with IAC and CI/CD pipelines to ensure reliable, repeatable ...

Development Manager (Platform) is responsible for leading the day-to-day development and delivery of SHG’s in-house reservation system, Hermes, built primarily in .NET. The role ensures highquality engineering, effective Agile ways of working, and the smooth delivery of enhancements, maintenance and integrations across the platform. … develop a team of software engineers, inherit and strengthen an established team culture, and work closely with the Solution Architect to ensure all development aligns with architectural standards and the wider technology strategy. Key Responsibilities: Manage the planning, delivery and quality of all development work on the Hermes ...