1 to 25 of 29 API Development Jobs in the UK excluding London

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

high-availability, data-intensive applications Collaborate with engineering, data, and business teams Required Experience Strong Python experience (Django, Flask or FastAPI) Proven backend/API development experience Experience within banking or financial services Exposure to cloud (AWS/Azure/GCP) and modern engineering practices Nice To Have ...

automation pipelines and network environments Create clear and concise technical documentation Contribute to evolving automation standards and best practices What Were Looking For Automation & Development Strong Python skills, including API development, integration, and testing Experience writing high-quality, testable code and participating in code reviews Hands ...

Dataverse • Supporting Power BI reporting and dashboards • Investigating and resolving technical issues • Supporting CRM-related functionality and integrations Required Skills: • .NET/.NET Core development experience • Power Platform experience or strong interest • SQL Server/T-SQL • API development • Umbraco CMS or similar platforms • Git version control ...

software engineering experience, ideally in engineering or scientific software dealing with large data volumes for an expert userbase Awareness of security and compliance considerations API development, for internal boundaries and potentially external usage Being involved in ensuring operational success through monitoring/diagnostics and troubleshooting for deployments … continuous improvement Languages of interest include Python, C++ and C#. Software may be desktop or web + cloud. Mobile app development is not a primary focus. AI and ML techniques are likely working with numerical data or imaging rather than natural language/LLM. The role offers a highly ...

Experience Required Strong programming and scripting skills (Python and Bash essential) Solid experience with cloud platforms - AWS and/or Azure Strong understanding of API development and security Experience designing or implementing security controls in complex environments Knowledge of, or strong interest in, data science and AI-driven … role with strong visibility across engineering and leadership teams Flexible working arrangements and a strong culture of collaboration Competitive compensation and long-term career development ...

Experience Required Strong programming and scripting skills (Python and Bash essential) Solid experience with cloud platforms - AWS and/or Azure Strong understanding of API development and security Experience designing or implementing security controls in complex environments Knowledge of, or strong interest in, data science and AI-driven … role with strong visibility across engineering and leadership teams Flexible working arrangements and a strong culture of collaboration Competitive compensation and long-term career development ...

experience writing high-quality Python in a commercial environment • Hands-on experience working with large language models (OpenAI, Anthropic, Mistral, or similar) • Familiarity with API development and modern software architecture • Understanding of prompt design and managing AI-generated outputs • Ideally have experience in RAG pipelines and vector databases ...

APIs, ensuring performance, reliability, and security standards are met Write and maintain automated end-to-end test suites using Playwright as part of the development workflow Contribute to architectural decisions and engineering standards alongside the Technical Architect Carry out thorough code reviews, championing quality and best practice across … automated build, test, and deployment processes Collaborate effectively with cross-functional teams including architects, testers, and product owners Troubleshoot and resolve complex issues across development, test, and live environments SKILLS AND EXPERIENCE NHS or government experience is essential - candidates without this will not be considered Strong, demonstrable senior-level ...

Python Developer - 6 months - Wokingham - Contract We are seeking an experienced Python Developer with strong expertise in algorithm development, optimisation modelling, and data-driven software engineering. This role focuses on building scalable Python applications, developing RESTful APIs, and supporting advanced analytical and optimisation solutions within a cloud-based environment. … Experience Required: 8+ years' experience as a Python Developer. Strong proficiency in Python programming and optimisation/analytics libraries. Proven experience with algorithm development and computational problem solving. Hands-on experience with data analytics, databases, and API development. Strong debugging, profiling, and performance optimisation skills. Excellent communication ...