1 to 25 of 44 API Development Jobs in the UK

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 ...

technology stack and wants exposure to enterprise-scale systems used by clients across multiple international markets. You will be involved in the full software development lifecycle, contributing to the development, maintenance, enhancement, and support of business-critical applications. The Role You will work closely with senior developers, technical … business stakeholders to deliver robust software solutions across a range of internal and client-facing platforms. The role offers a strong mix of, backend development, API development, Database work, application support, technical improvements and collaboration across the wider business. This is a hands-on development role ...

technology stack and wants exposure to enterprise-scale systems used by clients across multiple international markets. You will be involved in the full software development lifecycle, contributing to the development, maintenance, enhancement, and support of business-critical applications. The Role You will work closely with senior developers, technical … business stakeholders to deliver robust software solutions across a range of internal and client-facing platforms. The role offers a strong mix of, backend development, API development, Database work, application support, technical improvements and collaboration across the wider business. This is a hands-on development role ...

business infrastructure-allowing them to work flexibly while delivering high-quality legal services. Key Skills Frontend: Angular (latest versions), TypeScript, RxJS NgRx, REST API integration HTML, SCSS, modern UI frameworks Backend: C#, .NET/.NET Core API development & microservices SQL Server, Azure If this role matches your … business infrastructure-allowing them to work flexibly while delivering high-quality legal services. Key Skills Frontend: Angular (latest versions), TypeScript, RxJS NgRx, REST API integration HTML, SCSS, modern UI frameworks Backend: C#, .NET/.NET Core API development & microservices SQL Server, Azure If this role matches your ...

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rdparty products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

lead projects, mentor junior developers, and work on high-impact, secure banking solutions. You will be a key contributor to web portal and API development, ensuring performance, security, and reliability in a dynamic environment. This role is ideal for developers with strong technical expertise who are looking … portals using ASP.NET MVC/.NET Core Design and integrate REST APIs with internal and third-party services Implement secure authentication mechanisms (JWT, OAuth2, API Keys) Connect applications to relational databases using Entity Framework Core (DbContext, LINQ, Migrations) Debug and trace request flows from UI Controller API Database ...

end. The individual will also ideally have additional AI skills with Cursor or a similar coding agent. You will lead both backend and frontend development, collaborate with Product Owners and stakeholders, and play a key role in driving the long-term technical vision of our platforms. … joining an organisation where your work has visible impact, your ideas are valued, and innovation is encouraged. Key Responsibilities: Platform Development and Technical Leadership Lead the ongoing development and enhancement of multiple Laravel-based platforms Shape and maintain the long-term technical roadmap Translate business and user requirements ...

engineering practices, integrate AI models and agent patterns, and contribute to the evolution of our cloud-native services. You will already have strong software development experience and have a desire to grow deeper into engineering, while maintaining strong software craftsmanship and delivery discipline. As we move toward … ecosystem. You will help implement AI capabilities, support cloud-native services, and strengthen the squad’s engineering excellence as we scale. Key Responsibilities Software Development & Delivery: Design, build, test, and maintain high-quality software components and services across backend, frontend, or full-stack environments. Utilise AI Accelerated development ...

someone who enjoys practical engineering, collaborative problem-solving, and delivering maintainable solutions in a fast-moving environment. What You’ll Be Doing Software Development Contribute to the development and maintenance of .NET applications and services Build APIs, integrations, and backend functionality across a variety of projects Write clean … breaking down work into clear deliverables Support predictable and high-quality delivery outcomes Participate in Agile ceremonies, planning, and technical discussions Help maintain development standards, processes, and best practices Engineering Quality Contribute to CI/CD pipelines, automated testing, and DevOps practices Participate in code reviews and collaborative engineering ...

helping organisations build scalable and impactful digital products and platforms. We are currently seeking an experienced Senior Data Analyst to support the design and development of reporting dashboards and analytics for CAF and risk reporting tools within a major digital transformation programme. Job Summary We are looking … highly skilled Technical Lead with strong expertise in Python, Django, and modern web application architecture. The ideal candidate will be responsible for leading development teams, designing scalable Back End systems, and driving end-to-end technical delivery for enterprise-grade applications. The candidate should have hands-on experience with ...

Product Catalogue, CRM (Salesforce), Billing, Service Orchestration, Inventory, Service Assurance - understanding data models, system processes and integration patterns at implementation level - Integration architecture: microservices, API gateways, event-driven architectures, event brokers (Kafka), queues - handling 120+ integration points across systems and legacy stacks - Lead-to-Cash (L2C) and Order … Cash (O2C) solutions in Tier-1 telecom operator environments - TMF standards: Product Ordering (TMF641), Service Ordering, Service Activation, Service Inventory (TMF638) API Development & Integration - Strong expertise in API lifecycle design using OpenAPI specifications (OAS) - can read and write API specs - Hands-on with TMF/ ...

Location: Manchester Department: IT About the Role A clinical trials organisation is seeking a Full Stack Developer to support the design, development, and maintenance of secure, high-quality software solutions. The successful candidate will work across the full development lifecycle in a regulated environment, ensuring all work … support APIs and related integrations Work within a regulated clinical trials environment, following SOPs and applicable compliance requirements Contribute to secure software design, development, testing, and deployment Maintain and improve CI/CD pipelines and deployment processes, including Jenkins Support observability and monitoring practices using Open Telemetry, Loki ...

days a week onsite 6 months initially My client is looking for for Java Developers with strong backend and integration experience to support the development of scalable, API-driven systems. This role will focus on backend services, microservices architecture, and integration using MuleSoft, making it ideal for developers … enterprise platforms. Key Requirements Strong Java (8+) with Spring Boot/Spring Experience with microservices & REST APIs Hands-on MuleSoft (Mule 4) - Anypoint Platform, API development, JSON/XML Understanding of integration patterns & architecture Experience with CI/CD and Git Knowledge of TDD & automated testing Agile/ ...

standards. Implement business logic, data access layers, and integrations with internal and external systems. Develop and enhance RESTful APIs, following defined contracts and API standards. Write clean, maintainable, well-tested code, adhering to agreed engineering best practices. Contribute unit and integration tests to ensure functional correctness and regression safety. … assigned work. Follow established security, performance, and reliability guidelines when implementing backend changes. Skills & Experience Core backend engineering 3-6+ years of backend development experience. Strong experience with Python or equivalent backend frameworks. Solid understanding of REST API development, request/response models, and error handling. ...

promptly Experience with Copilot, Copilot Studio, and Agents Strong knowledge of Exchange Online Strong understanding of the Microsoft 365 tenant platform Experience with Graph API and API development Experience with Entra backup solutions, including Rubrik Ability to identify risk mitigation opportunities and develop new policies and procedures ...

hire an Applications Developer into their London team. This is a strong fit for someone with deep Microsoft stack experience, particularly around SharePoint development and ASP.NET applications within enterprise environments. The role will focus on designing, developing, and supporting internal business applications and collaboration platforms across both on-prem … cloud-based environments. Key areas include: • SharePoint 2016/2019/SE & SharePoint Online development and administration • ASP.NET MVC/ASP.NET Core MVC application development • C# and Web API development • SQL Server, Entity Framework & SSRS • Power Platform (PowerApps/Power Automate) • Front-end technologies including React ...

deployment, ensuring we meet the evolving needs of our customers with innovative, reliable software. Required Skills: Strong experience in C# and .Net Core development Proficiency with Web API design and development Solid understanding of REST principles and SOLID design patterns Hands-on experience with Docker, Kubernetes …/SCRUM methodologies, CI/CD, and DevOps practices Good communication skills and a collaborative team mindset Nice to Have Skills: Experience with Web API integrations and microservices architecture Knowledge of Kubernetes and container orchestration AWS or Azure certifications or experience Familiarity with WebSocket or real-time data streaming ...

Clearance - current and active SC Cleared already is strongly preferred Role Description The Integration Lead is responsible for leading the technical design, development, and delivery of secure, scalable, and reusable foundational technology services within the Secure Digital Platform. The Integration Lead partners with Delivery Leads, product owners and architects … delivered solutions align with solution designs and security guardrails. Guide teams in the selection and use of modern tools, frameworks, and platforms that optimise development efficiency and operational effectiveness for delivery. Support the development and evolution of the Secure Digital Platform roadmap by identifying technical dependencies, enablers ...

drive engineering modernisation, cloud adoption, and scalable analytics capabilities within a fast-paced financial environment. You will play a key role in the design, development, and enhancement of enterprise-grade investment and credit trading technology solutions. The role combines hands-on engineering with modern cloud-native delivery practices, automation … assisted software development approaches Responsibilities include: * Develop and enhance full-stack applications supporting investment and trading workflows * Build and optimise cloud-based data platforms and pipelines using Snowflake and DBT * Deliver reporting and analytics solutions using Sigma and Power BI * Support .NET application modernisation and API development ...

BENEFITS £50-60k salary depending on experience Hybrid working - 4 days per week on-site, 1 day remote Modern technology stack and greenfield development opportunities Opportunity to mentor and lead a growing engineering team High level of ownership and influence across architecture and delivery Collaborative and ambitious engineering … .NET MAUI mobile applications - contributing from concept through to deployment. ESSENTIAL SKILLS Strong commercial experience with C#/.NET Modern .NET 8/10 development experience Blazor/Razor Components ASP.NET Core REST API development Entity Framework Core AWS infrastructure experience MySQL CI/CD pipelines using ...

Agentic AI tooling and orchestration frameworks LangChain/LangGraph PyTorch and ML libraries REST APIs Docker and containerisation CI/CD pipelines Git-based development workflows What we're looking for 4-6 years' experience within Software Engineering, AI Engineering, or Machine Learning Engineering roles Strong hands-on Python … engineering practices Exposure to Agentic AI frameworks or autonomous AI workflows Experience working with Azure and Databricks Good understanding of backend engineering and API development Experience collaborating across cross-functional engineering and product teams Ability to mentor or support junior engineers Strong communication and problem-solving skills Package ...

Azure CLI used regularly for automation, operational tasks, and reducing manual intervention. Azure Integration Services: proficient in Logic Apps, Service Bus, Event Grid, and API Management for integration design and implementation. API Development: solid experience with SOAP and REST APIs, including design, development, and secure management. … Summer event and 4 sponsored weekends a year. If you’re an Azure Cloud Engineer looking for a career defining opportunity with progression and development, then please drop Lee at MARS an application. MARS Recruitment is an equal opportunities employer and positively welcomes applications from suitably qualified applicants regardless ...

United Kingdom, London, LondonEngineering Manager Software & MLAbout this roleWe are looking for a Software Engineering Manager who brings a solid foundation in modern development and some experience with Machine Learning environments. You ll lead and grow a team that builds the core software powering our data-driven financial products … Collaborate with Product Managers and Data Scientists to ensure ML models are effectively integrated into our production software.Build Robust Systems: Oversee the development of platforms that are performant, secure, and capable of handling the unique deployment needs of AI-powered features.Optimize Delivery: Enhance engineering and agile processes, ensuring that ...

London, London Engineering Manager - Software & ML About this role We are looking for a Software Engineering Manager who brings a solid foundation in modern development and some experience with Machine Learning environments . You'll lead and grow a team that builds the core software powering our data-driven … Collaborate with Product Managers and Data Scientists to ensure ML models are effectively integrated into our production software. Build Robust Systems: Oversee the development of platforms that are performant, secure, and capable of handling the unique deployment needs of AI-powered features. Optimize Delivery: Enhance engineering and agile processes ...

Applied AI engineering, ML engineering or software engineering background Experience with LLMs, RAG, embeddings, prompt engineering or fine tuning Exposure to LangChain, LangGraph, Agent Development Kit or similar agent frameworks Experience with vector databases such as Pinecone, Chroma or similar API development experience, ideally with FastAPI ...