1 to 25 of 95 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 ...

SoftwareDeveloper(API Development/Backend Node.js, C#, Fullstack) Birmingham, West Midlands (Hybrid 1 day onsite a week) 55k + Benefits Were partnering with a leading enterprise software house in Birmingham that is expanding its engineering team. Theyre looking for a Software Engineer with strong API and backend … development experience to work on complex, high-performing systems used by global clients. This Developer role offers the opportunity to build and enhance large-scale, data-driven applications with a focus on reliability, scalability, and performance. As a Software Engineer, youll take ownership of backend services and integrations, designing ...

Cleared Java Developer to support the delivery of modern, cloud-based applications within an AWS environment. The role will involve backend development, API delivery, and contributing to greenfield microservices-based solutions. Hybrid working is required, with on-site presence in Croydon . Key Skills (Essential) Strong Java development experience Spring Boot SQL and report writing Experience working in AWS environments EBSA experience API development and microservices architecture Experience with CI/CD pipelines Containerisation using Docker and/or Kubernetes Experience delivering greenfield development projects Active SC Clearance Desirable Skills React Next.js Experience working ...

with FastAPI). A product-first mindset is essential, ensuring the entire stack delivers reliable, high-quality experiences. Key Responsibilities End-to-End Feature Development Design, develop, and deploy features across the full technology stack Translate product requirements into scalable technical solutions Build systems from database schema to backend … services to frontend components Frontend Development & User Experience Develop high-performance, responsive interfaces using React and Next.js Optimize usability, performance, and responsiveness Implement polished UI elements including animations, accessibility improvements, and micro-interactions Collaborate with product and design stakeholders to deliver intuitive user journeys Backend Development & API ...

with FastAPI). A product-first mindset is essential, ensuring the entire stack delivers reliable, high-quality experiences. Key Responsibilities End-to-End Feature Development Design, develop, and deploy features across the full technology stack Translate product requirements into scalable technical solutions Build systems from database schema to backend … services to frontend components Frontend Development & User Experience Develop high-performance, responsive interfaces using React and Next.js Optimize usability, performance, and responsiveness Implement polished UI elements including animations, accessibility improvements, and micro-interactions Collaborate with product and design stakeholders to deliver intuitive user journeys Backend Development & API ...

Engineer to join our team! We're particularly looking for someone with strong Golang experience and with some experience of TypeScript and React frontend development . If you also have a knack for Kubernetes/containerisation, that's a significant bonus! In this role … contributor to the development and operation of our cutting-edge cloud-based platform. You should have a passion for both science and engineering, a proven ability to deliver production-ready solutions, and a collaborative spirit to work closely with our product and research teams. All positions at Safe Intelligence ...

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 ...

technologies, and hypervisors. Familiarity with container orchestration solutions such as OpenShift is essential, including the deployment, scaling, and management of containerised applications in both development and production settings. • Comprehensive Networking Knowledge - Solid understanding of networking fundamentals and their interaction with operating systems. This includes expertise in TCP/… protocols, port allocation and management, firewall configuration, and network security best practices, ensuring robust and secure connectivity across all layers of the infrastructure. • API Development and Integration Skills - Practical experience with Mulesoft and Postman for API development, testing, and lifecycle management. Capable of designing, implementing ...

with GenAI, Gemini or Open source LLMs, Train, finetune and Onboard new LLMs Experience in building GenAI applications using Python Hands-on Experience with API Development and Microservices architecture and End to End integrations Knowledge of RAG (Retrieval-Augmented Generation) and ADK, MCP Solid understanding of LLMs, prompt … engineering, and graph-based workflows Hands-on Experience with API Development and Microservices architecture Experience in CI/CD pipelines, and containerization (Docker/Kubernetes), Harness and Git actions Practical experience implementing LLM and GenAI solutions, including prompt engineering, model fine tuning, RAG pipelines, embeddings, and vector databases ...

Data Engineer – Onsite (Central London) ⭐️ £50,000 – £55,000 + benefits ⭐️ 5 days onsite – Central London ⭐️ SQL, Python, API development ⭐️ Financial background preferred Join a leading investment management firm with a strong reputation for innovation in the financial sector. This is a fantastic opportunity to play … Engineer with solid SQL skills and experience in building and maintaining back-end APIs. SQL - strong experience essential. Python experience required. Proven experience in API development and maintenance. Previous experience within a financial services or investment management environment preferred. Strong analytical mindset and attention to detail. Excellent problem ...

Location: Edinburgh (Office-based preferred, hybrid considered) Employment Type: Full Time Salary: £120,000 per annum Department: Technology/Systems Development Reports To: Director Role Overview We are seeking a highly experienced Senior Full Stack Developer/Head of Engineering to lead the design, development, and long-term … underpins our operations. This is the most senior technical role within the organisation. The successful candidate will be responsible not only for hands-on development, but also for defining system architecture, establishing development standards, and building the wider technology team over time, including DevOps and QA functions. ...

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 ...

experienced Software Architect/Senior Developer with strong expertise in Microsoft Dynamics 365 and related technologies. The role involves leading the application development function while maintaining hands-on technical capability across the Dynamics 365 ecosystem and integrated enterprise systems. This position blends technical leadership, architectural ownership and delivery oversight … with a strong focus on system design, integration strategy and scalable solution development. Key Responsibilities Development Leadership & Delivery* Lead, mentor and support the development team.* Own and maintain the application development roadmap.* Ensure high-quality and timely delivery of development projects.* Establish coding standards, governance ...

Java Developer - IAM/API Sheffield (1-2 days per month onsite) Inside IR35 We're supporting a leading financial services client in hiring a Java-focused Application Developer to build secure, scalable identity and access solutions within a modern cloud environment. This role centres on Java API … development, identity orchestration, and event-driven architectures, working closely with security and engineering teams to deliver robust IAM and data-driven solutions. Key Responsibilities Design and develop secure, scalable RESTful APIs (Java) supporting identity and access workflows Build and enhance identity lifecycle orchestration (provisioning, de-provisioning, access controls) Develop ...

Ireland Job Type: Contract- Fully On-site Job Summary: We are seeking a skilled and versatile Sr Java Developer with strong experience in REST API development , Perl scripting , and exposure to .NET technologies . The ideal candidate will be responsible for designing, developing, and maintaining scalable backend systems … while collaborating with cross-functional teams. Required Skills: Strong experience in Java (J2EE, Spring Boot, Microservices) . Expertise in REST API design and development . Hands-on experience in Perl scripting . Working knowledge of .NET framework/.NET Core . Experience with database technologies (SQL/NoSQL ...

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex … operations with ease. They’re now seeking a Lead PHP Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. ...

water-quality monitoring equipment used by water utilities and industrial customers to prevent flooding, reduce pollution, and improve environmental compliance Job Description Software Development Lead Hybrid with Travel to Nelson Permanent, full-time Competitive salary, Bonus plus benefits We are seeking an experiencedSoftware Development Lead with deep expertise … systems, cloud-native development on AWS, data ingestion pipelines, and API development. You will design and build the backend services that support our connected IoT devices-managing secure device communication, high-volume data ingress, and the APIs that power our applications and customer experiences. This role is ideal ...

IR35 - Umbrella only About the Role: We are seeking a highly skilled and versatile Senior Developer to join our team and contribute to the development and maintenance of our cutting-edge Azure Databricks platform for economic data. This platform is critical for our Monetary Analysis, Forecasting, and Modelling activities. … Senior Developer will be responsible for both front-end and back-end development, with a focus on Python, including the challenging but rewarding task of reverse engineering an existing codebase to integrate new features and improvements. This role requires a strong understanding of software development principles, experience with ...

Experience: 10+ years About the Role: We are seeking a highly skilled and versatile Senior Developer to join our team and contribute to the development and maintenance of our cutting-edge Azure Databricks platform for economic data. This platform is critical for our Monetary Analysis, Forecasting, and Modelling activities. … Senior Developer will be responsible for both front-end and back-end development, with a focus on Python, including the challenging but rewarding task of reverse engineering an existing codebase to integrate new features and improvements. This role requires a strong understanding of software development principles, experience with ...

Centre Salary - £50-60k + Excellent Benefits A leading enterprise software house is seeking an experienced Full Stack Developer to join its Birmingham development team. This hybrid role offers a great balance of flexibility and collaboration. The Software Developer will design, develop, and deliver scalable, high-performance applications … used by engineers and transport organisations across the globe. Key Requirements for this Full stack Developer: 5+ years experience with Node.js, & React Strong REST API development skills Solid current experience with C# in enterprise environments Knowledge of CI/CD, cloud infrastructure, and Azure DevOps Experience withCypress Testing ...

technical direction within your team Required Skills and Experience Full-stack experience across a selection of JavaScript frameworks (React, NextJS), TypeScript, Python, Java REST API development & OpenAPI/Swagger Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL … testing frameworks (e.g. Mocha, Jest, Cypress) We appreciate you may not be an expert in every area above - we can support with training and development in some areas! Please do make an application and we will identify where we can best support your growth specific to your application. ...

technical direction within your team Required Skills and Experience Full-stack experience across a selection of JavaScript frameworks (React, NextJS), TypeScript, Python, Java REST API development & OpenAPI/Swagger Cloud services (AWS or Azure) Containerisation & Orchestration (Docker, Kubernetes, OpenShift) Infrastructure as Code (Terraform, Ansible) Relational Databases (e.g. PostgreSQL … testing frameworks (e.g. Mocha, Jest, Cypress) We appreciate you may not be an expert in every area above - we can support with training and development in some areas! Please do make an application and we will identify where we can best support your growth specific to your application. ...

/3 days on site Duration: 04/05/2027 Rate- £506 MUST BE PAYE THROUGH UMBRELLA Key Responsibilities: Lead and manage software development projects using Java, Python, Typescript, AWS, React JS, Angular, and other technologies. Collaborate with cross-functional teams to define project scope, objectives, and deliverables. … data, wherever possible Work with cross-functional teams to deliver the defined scope, objectives, and deliverables on technical grounds Facilitate communication between stakeholders, development teams, and other departments. Ensure adherence to software development lifecycle (SDLC) processes and best practices. Develop detailed project plans, including timelines, resource allocation ...

SaaS business is hiring a Senior Back End Engineer to help build and evolve its platform, with a strong focus on modern AI-assisted development workflows. This is a hands-on role suited to someone who is already leveraging AI engineering tools day to day to improve speed, quality … across a modern TS/JS stack Working alongside legacy PHP systems, helping evolve and modernise the platform Using AI engineering tools to accelerate development, debugging and delivery Designing scalable services and clean system boundaries Integrating third-party APIs including AI, analytics and external services Collaborating closely with product ...

work closely with the CTO, and you will help shape the design of our platform. The ideal candidate is someone with passion for web development, a with a particular focus on front end design; ideally, you should have previous experience with data visualization, contributed to open source projects … also expected to be familiar with and to help develop and maintain our cloud infrastructure, including AWS/Google Cloud management, back end and API development, and so on. In detail, your duties will include: Build React + TypeScript features for dashboards, charts, and workflows. Design and maintain ...