1 to 25 of 30 Permanent API Development Jobs in England

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 ...

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 ...

building scalable, production-ready applications across both the frontend and backend. Working within a collaborative engineering team, you will help shape software architecture, development standards, testing practices and long-term product direction. Whilst some projects involve sophisticated physical systems and devices, prior experience with hardware-integrated software environments … commercial experience in full-stack software engineering Strong JavaScript and TypeScript experience Experience building scalable backend systems using Node.js, NestJS or similar frameworks Frontend development experience using Angular or similar modern frontend frameworks Experience designing and developing RESTful APIs Experience working within Linux-based environments Strong understanding of software ...

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 ...

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 ...

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 ...