1 to 25 of 47 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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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. ...

translate business requirements into scalable technical solutions. Work with structured and unstructured data sources, ensuring quality, integrity, and availability of data. Contribute to the development of data models and data architecture best practices. Implement and optimise ETL processes using Python and modern frameworks. Maintain clear and reusable codebases across … governance, security, and compliance processes across all data workflows. Key Skills & Experience Essential: Active DV (Developed Vetting) Security Clearance Strong proficiency in Python and API development Experience or strong interest in data engineering, data pipelines, and automation Solid understanding of TypeScript/JavaScript and back-end integration principles ...

design build deploy) Contributing to architecture and best practices Collaborating closely with product and engineering teams What they’re looking for: 5+ years’ software development experience Strong Next.js/React/TypeScript background Experience building scalable web applications Solid understanding of SSR, SSG & frontend performance API development ...

Responsibilities Develop, enhance, and maintain Java-based applications and microservices. Work within cross-functional Agile teams (Developers, BAs, QAs, DevOps). Contribute to API development, integration, and backend service build. Deliver clean, testable, maintainable code aligned with best practices. Participate in code reviews, pair programming, and continuous improvement. ...

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 click apply for full job details ...

role focuses on developing reliable, high-performance backend services and supporting the infrastructure they run on. You’ll work primarily with Python, contributing to API development, system design, and automation, while ensuring everything is robust, maintainable, and production-ready. You’ll be part of a collaborative, remote-first … engineering team, working across the full lifecycle of backend development—from design through to deployment and ongoing improvement. What You’ll Do Build & Scale Backend Services Develop and maintain backend services using Python (FastAPI or similar frameworks) Design systems that are scalable, efficient, and reliable Turn product and technical ...

excellent opportunity to join this innovative and fast-growing AI tech. organisation! Skills/experience 2+ years solid commercial Python coding experience (backend, API development would be great). Good understanding of Docker, Kubernetes, and scalable distributed systems . An Agile mindset and Experience working in agile teams ...

IR35 Day rate: Up to £600 per day Duration: Initial 3 months but will most likely extend Start date: ASAP Key words: ElementSuite, Integration, API, Dataflows We are looking for a HRIS system Integration Engineer to connect our Clients core HRIS (ElementSuite) with their AI recruitment tool (Talent.AI … data flow, writing the middleware or scripts to sync these systems, and ensuring that data remains secure and accurate across all platforms. Core Responsibilities - API Development & Mapping: Use REST APIs to create seamless data synchronisation between ElementSuite, Aslan, and Talent.AI. - Workflow Automation: Automate the _Hire-to-Onboard_ journey ...

engineering with clear documentation and stakeholder collaboration. Your Skills and Experience To be successful, you will bring: • Strong Python skills for backend services, SDKs, API development, authentication and testing. • Hands‐on experience working with LLMs, embeddings, prompt engineering, tool calling and RAG design. • Practical knowledge of GCP services ...

leverage external tools Familiarity with agentic SDKs (ADK, LangChain, LlamaIndex, etc.) Proven track record of deploying AI applications into production environments Strong understanding of API development, microservices, and containerization (Docker, Kubernetes) Knowledge of MLOps best practices Excellent problem-solving skills and ability to work in a fast-paced ...

available Role Overview We are seeking an experienced Back-End Developer with strong Laravel and PHP expertise to play a key role in the development and scaling of our marketplace platform. You will be responsible for designing and building robust, secure, and high-performance backend systems that support core … marketplace functionality and evolving business requirements. Key ResponsibilitiesSystem Architecture & Development Design and implement scalable, maintainable backend architecture Apply SOLID principles, clean code practices, and clear separation of concerns Develop modular components using service-layer and repository patterns Core Platform Features User authentication and role-based authorisation (Sanctum/Passport ...

second-line and occasional out-of-hours support Communicate technical ideas clearly to non-technical stakeholders Promote best practices and contribute to the wider development community Essential Skills & Experience Strong recent experience with Java 21 or later Excellent grasp of TDD and BDD Experience with large microservice architectures Agile … delivery experience API development (internal and external) Automated testing for CI/CD environments Comfortable working on Linux or macOS Ability to learn new tools and technologies quickly Understanding of responsive web design Desirable Skills Jackson, JAX-RS, Mockito Messaging platforms (Kafka or ActiveMQ) MongoDB or other document ...