10 of 10 Contract API Development Jobs in England

Senior Java Backend Developer - API & Microservices Modernisation Location: Telford - minimum 2 days per month onsite, remaining time remote Contract Length: 12 months Rate: £550 per day IR35: Inside IR35 Start Date: Candidates must be available to start w/c 4 January 2027 Client: Central Government The Role … Java-based RESTful APIs and microservices, with a strong focus on scalability, resilience, maintainability and integration with existing systems. Essential Skills Java - Strong backend development experience. Spring Boot - RESTful API and microservices development. Microservices Design - Experience designing scalable, resilient and loosely coupled microservices, including service-to-service communication. ...

building and enhancing modern applications, APIs, and cloud-native services, whilst mentoring developers and promoting engineering best practice. Key Responsibilities Lead the design and development of robust, scalable software solutions Drive technical decision-making and provide guidance to development teams Develop and maintain RESTful APIs and microservices Build … quality, automated testing, and CI/CD best practices Support deployment, containerisation, and platform optimisation activities Essential Skills & Experience Strong commercial experience with Node.js API development using REST and OpenAPI Web application development using HAPI Database expertise across PostgreSQL , MongoDB , and Redis Unit testing with Jest ...

modern web applications in an enterprise environment. Essential Skills Strong commercial experience with React TypeScript and modern JavaScript (ES6+) C#/.NET Core REST API development and integration HTML5, CSS3 and responsive UI development Git and Agile delivery practices Desirable Node.js Azure and/ ...

including sprint planning, retrospectives, and stand-ups. Drive continuous improvement across engineering standards and practices. Required Skills & Experience Essential 4+ years of commercial Java development experience. Strong knowledge of: Java 11/17/21 Spring Boot Spring Framework REST API development Microservices architecture Experience with … version control Unit and integration testing (JUnit, Mockito) Agile/Scrum methodologies Understanding of: Object-Oriented Design principles Design Patterns Secure coding practices Software development lifecycle (SDLC) Reasonable Adjustments: Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built ...

development. - Strong experience with modern JavaScript frameworks and responsive web application development. - Experience with Server Side programming languages, frameworks and service architecture. - Strong API development, microservices and Legacy system integration experience. - Experience with relational and non-relational databases. - Hands-on experience with Docker, Kubernetes and containerised applications. - Strong ...

delivering enterprise-scale integration solutions. The individual should have extensive hands-on experience with Azure Integration Services, including Logic Apps, Azure Functions, Service Bus, API Management, and REST APIs, alongside a deep understanding of integration patterns and system-to-system connectivity. Key skills required include: * Azure Integration Services (Logic … Apps, Functions, Service Bus, Event Grid, API Management) * Enterprise integration architecture and design * API development, management and integration * System-to-system integration across complex application estates * Azure-native solution design and implementation * DevOps and CI/CD pipelines for automated deployment and release management * Strong troubleshooting ...

Python specialist with a strong background in performance optimisation, near real-time systems and Kubernetes . Essential Skills & Experience: 10+ years of professional Python development experience Strong expertise in performance tuning , profiling and optimisation Experience developing low-latency, high-throughput systems Strong troubleshooting and root-cause analysis skills Experience … with event-driven and streaming architectures (Kafka, RabbitMQ, WebSockets) API development using FastAPI, Flask or Django Hands-on experience with Kubernetes and Docker Strong understanding of concurrency, asyncio, multiprocessing and threading Solid software architecture and design skills Experience with CI/CD pipelines, Git and Agile environments Desirable ...

Security Clearance (SC) is essential for this position. We are seeking a Mid Backend Engineer to join a delivery pod, contributing to the design, development and maintenance of scalable, resilient backend systems. The role will specialise in event-driven architecture and CQRS-based systems, working within a collaborative engineering … environment to deliver robust, distributed solutions. The successful candidate will have strong backend development experience, a solid understanding of architectural patterns and practical experience building event-driven applications. Key Responsibilities Design, develop and maintain backend services and applications within a pod-based delivery model. Implement and support systems built ...

looking for an experienced Scala Developer to support critical government technology services and high-priority national infrastructure projects. Key skills required: Strong commercial Scala development experience Functional programming principles Microservices and API development Play Framework experience desirable Agile delivery and live service support If this Scala Developer ...

Back End services Maintain high code quality through testing, reviews and best practices Mentor junior developers where required Required Skills Strong Core Python development experience Experience with enterprise trading and risk platforms (eg Quartz, SecDB, Athena, Kanon, Beacon or similar) Strong SQL and large-scale data handling expertise Pandas … NumPy for data processing and analytics REST API development using Flask, FastAPI or Django Strong understanding of performance optimisation and scalable systems Unix/Linux and Shell Scripting experience Domain Experience Investment Banking or Capital Markets background Experience across Market Risk, CCR, PnL, Trade Lifecycle and Reconciliations Knowledge ...