18 of 18 Contract API Development Jobs in the UK

Work With: Our client is a leading global technology and engineering solutions company, delivering next-generation digital transformation initiatives. You will work as part of a high-performing Agile development team focused on building a credit decisioning engine powered by scalable microservices and cloud-native solutions. About the Role: As a Java Fullstack Engineer , you will play a pivotal … and frontend features focused on performance and reliability. Work closely with architects and product owners to define and implement technical solutions aligned with business goals. Required Skills & Experience: Backend Development: 8–15 years of experience with Java, Spring Boot , and microservices architecture . Java 17: Hands-on experience is mandatory . DevOps & Cloud: Proven experience with GCP , AWS , or … Azure , and familiarity with CI/CD pipelines . API Development: Expertise in RESTful API design and development. Frontend: Working knowledge of ReactJS or Angular . Testing: Strong background in automated testing , including JUnit . Mindset: Excellent communication skills and a commitment to continuous learning in a collaborative Agile environment. Good to Have: Experience with GCP Data More ❯

frameworks. Collaborate with architects, testers, and cyber security teams to ensure compliance and resilience. Essential Skills & Experience Node.js (advanced) - event-driven architecture, async programming TypeScript - strongly typed, enterprise-grade API development Express.js or NestJS - RESTful and modular service design Security-first development - OAuth2, JWT, TLS, secure logging Containerisation - Docker, Kubernetes, or OpenShift CI/CD - GitLab CI More ❯

AI Solutions Engineer AI Solutions, B2B, B2C, Azure, AI Foundry, Open-AI, Microsoft Copilot Studio, Machine Learning, Python, TensorFlow, PyTorch, scikit-learn, Large Language Models, LLM, Data preprocessing, REST API, Microservices architecture, MLOps, CI/CD for ML, Power-BI, Docker, Kubernetes, AI Ethics, Cloud Platforms, AWS, Google Cloud Platform, SQL, NoSQL, DevOps, Financial services, Regulatory environments Contract Type … Hybrid/Bedford Daily Rate: £600-£650 (via Umbrella) 9 months initial contract We are seeking two AI Solutions Engineers to lead the design, development, and deployment of AI solutions. This hands-on technical role focuses on building scalable AI-powered services for both B2B and B2C applications. The successful candidates will work under the coordination of the Lead … Open-AI services, and Microsoft Copilot Studio. Collaborate with cross-functional teams to integrate AI technologies into business processes and consumer applications. Manage the full lifecycle of AI solution development from concept to deployment and maintenance. Utilize programming skills in Python to automate processes and enhance functionality. Work with large datasets for data preprocessing, feature engineering, and model evaluation. More ❯

desirable Your main responsibility will be to deliver clean, maintainable, and well-tested code that adheres to SOLID principles. You will work collaboratively across Quality Assurance, DevOps, and other development teams, sharing knowledge, supporting onboarding, and contributing to code reviews. Key Responsibilities Deliver high-quality, maintainable code and development outcomes. Manage data exchange between backend services, front-end … clear code comments. Ensure compliance with quality standards, including automated testing and code reviews. Address non-functional requirements such as performance, monitoring, and operational support. Support releases through all development environments, maintaining quality and reliability. Contribute to skill development and technology adoption within the team. Present technical concepts in demos and participate in user feedback sessions. Provide accurate … RAML, REST APIs, flow control, and error handling. Hands-on experience with the Anypoint Platform (CloudHub, VPC, VPN, DLB, firewalls, and cloud technologies). Securing and managing APIs using API Manager. Developing frameworks for error handling and logging. Managing the API development lifecycle from design to governance and management. Working with batch message processing, Salesforce, file, and More ❯

Boot and JUnit Apply Kubernetes for containerisation and deployment Collaborate within Agile Scrum teams to deliver high-quality software solutions Write clean, maintainable code following best practices in secure development Support continuous integration, testing, and deployment activities Essential Skills & Experience Strong hands-on experience with Java and Spring Boot Solid understanding of REST API development and JSON More ❯

environments with tight security controls Experience integrating AI or ML services into real-world applications Knowledge of authentication, secret management, networking, and model access governance Bonus Points For: Kong API Gateway, Kong Mesh, Flux CD AWS stack: EC2, EKS, S3, SQS, DynamoDB, Bedrock RESTful API development with FastAPI, microservices, Terraform, GitOps workflows Prompt evaluation tools such as More ❯

functional teams to deliver high-quality software solutions. Core Skills Strong C# Skills: Demonstrated proficiency in C# programming, with a focus on building scalable applications using .NET Core. Web API Development: Expertise in designing, developing, and maintaining well-structured RESTful APIs to facilitate data exchange between systems. Database Management: Solid understanding of SQL databases and experience working with … NoSQL databases, particularly MongoDB. Cloud Architecture: Proven ability to architect and implement scalable cloud solutions using AWS, adhering to best practices for event-driven systems. Front-End Development: Proficiency in TypeScript and Angular for building modern, responsive web interfaces. Messaging Systems: Experience working with message queues and streams, such as RabbitMQ and AWS Kinesis/SQS, to handle asynchronous More ❯

functional teams to deliver high-quality software solutions. Core Skills Strong C# Skills: Demonstrated proficiency in C# programming, with a focus on building scalable applications using .NET Core. Web API Development: Expertise in designing, developing, and maintaining well-structured RESTful APIs to facilitate data exchange between systems. Database Management: Solid understanding of SQL databases and experience working with … NoSQL databases, particularly MongoDB. Cloud Architecture: Proven ability to architect and implement scalable cloud solutions using AWS, adhering to best practices for event-driven systems. Front-End Development: Proficiency in TypeScript and Angular for building modern, responsive web interfaces. Messaging Systems: Experience working with message queues and streams, such as RabbitMQ and AWS Kinesis/SQS, to handle asynchronous More ❯

reused. You'll be part of a small, agile, multi-disciplinary team working on open data platforms and services that make a real difference. This is a hands-on development role with strategic influence, where you'll help shape architecture, engineering practices, and delivery standards across a growing programme team of 60+ people. Key Responsibilities Design, build, and maintain … Ensure code quality, documentation, and maintainability Align delivery with recognised standards including the Technology Code of Practice and Service Standard Essential Skills & Experience 4+ years of experience in software development Strong proficiency in Ruby (Python is a bonus) Experience with microservices or service-oriented architecture Skilled in writing clean, well-documented code and taking ownership of the development process Comfortable working in agile , cross-functional teams Familiarity with: Docker & Kubernetes Git & version control API development (REST, GraphQL) Cloud deployment Open data platforms or search technologies Desirable Experience working with or within government or public sector teams Background in open data , civic tech, or mission-driven organisations Working Arrangements Base location: London or Manchester (2 days More ❯

Manchester (3 days per week in office, Tuesday–Thursday), the successful candidate will be responsible for designing, developing, and maintaining modern cloud-based systems. You will work across backend development, DevOps, and infrastructure as code, collaborating closely with global teams in Australia, the U.S., and locally in Manchester. Key Responsibilities: Backend Development (50%) Design, develop, and enhance backend … requirements into technical solutions in collaboration with Product Owners. DevOps/Cloud Operations (40%) Work with AWS to manage, optimise, and secure cloud infrastructure. Deploy and maintain services across development, testing, and production environments. Detect and prevent security threats, including account takeover attempts. Drive continuous improvement in technical standards, tools, and processes. Infrastructure as Code (10%) Deploy and manage … architects and global teams to implement reusable and maintainable infrastructure components. Required Qualifications: Strong expertise in cloud computing and services (AWS experience preferred). Proficiency in TypeScript and REST API development ; experience with NestJS preferred. Deep understanding of cloud security principles , including IAM, networking, and encryption. Experience with web services and microservices-based architectures . Excellent communication skills More ❯

BPSS to start; active SC required due to timescale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary focus), Python experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence … to technical standards Approach: Pride in producing high-quality, well-documented code Ownership of the full development process Collaborative working with user-centered design (UCD) teams Thrives in small, agile, multi-disciplinary teams Key Responsibilities: Develop Ruby-based applications and data services Build and maintain APIs and open data platforms Ensure code is high-quality and well-documented Work … For: Senior Ruby developer with strong focus on code quality Experience working with data services Comfortable working in small, agile teams and collaborating with UCD teams Desirable Skills: Python development Experience in public sector or government projects Knowledge of search technologies and open data platforms Active SC clearance More ❯

BPSS to start; active SC required due to timsecale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Python development (primary focus), Ruby experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence … to technical standards Approach: Pride in writing high-quality, well-documented code Ownership of the full development process Collaborative working with user-centered design (UCD) teams Thrives in small, agile, multi-disciplinary teams Key Responsibilities: Develop Python-based applications and data services Build and maintain APIs and open data platforms Ensure code is of high quality and well-documented More ❯

solution. This role is ideal for a hands-on developer who enjoys solving complex problems and improving legacy systems using modern technology. Key Skills & Experience Strong Node.js and JavaScript development experience Experience working on greenfield or migration projects Good understanding of API development and system integration Exposure to MongoDB (Mongo Atlas desirable) Comfortable working in Linux environments More ❯

infrastructure tasks. The role consists of: Paid onboarding: Initial hours to familiarise yourself with our technology stack, documentation, codebase, and processes Ad-hoc hourly work: Support, bug fixing, feature development, triaging, and emergency assistance as needed The successful candidate will be especially useful to the editorial team in advising on XML-related issues and tasks. Who This Role Suits … stress environment People interested in digital humanities/academic technology Developers who enjoy working across varied technical areas Those comfortable with both maintaining legacy systems and contributing to new development Freelancers who can respond to requests within a reasonable timeframe Responsibilities Assist with maintenance of our current Web UI (Ember-based) and contribute to the new NextJS React frontend … as directed Support the editorial team with content management and XML triage tasks Help with basic backend API tasks under supervision Provide assistance with infrastructure and DevOps tasks as needed Technical Requirements Required: Basic understanding of XML processing and structure Proficiency in HTML5/CSS3 and JavaScript Ability to read and debug code Comfortable working with version control (Git More ❯

experienced Technical Lead (Java) to join a large-scale central government programme , supporting the delivery of high-quality, secure, and scalable digital services. You'll lead technical direction across development teams, ensuring best practice in software engineering, architecture, and delivery. This role requires hands-on Java expertise alongside the ability to mentor engineers and influence technical decisions across multiple … workstreams. Key Responsibilities Provide technical leadership and guidance to software engineering teams Define and implement best practices in software design, coding, testing, and deployment Lead the development of secure and scalable Java-based applications Collaborate closely with Product Managers, Architects, and Delivery Leads to ensure technical alignment Contribute to continuous improvement and innovation within a complex, multi-team environment … with experience designing and building enterprise-scale applications Proven experience as a Tech Lead or Senior Engineer in central government or large public sector programmes Solid understanding of microservices , API development , and integration patterns Experience with cloud environments (AWS, Azure, or similar) Knowledge of CI/CD pipelines , containerisation , and infrastructure as code principles Strong communication and stakeholder More ❯

experience Skills required C# .Net Framework and Object Orientated programming concepts. Oracle and SQL server (PL/SQL & TSQL). .NET Core C# and .NET (Windows & Web) development. Web API development DataStage ETL Databricks Key Responsibilities Develop and maintain applications using C#, .NET Framework, and .NET Core for both Windows and Web platforms. Design and implement Web APIs More ❯

and Microsoft Copilot Studio. Apply governance frameworks for AI/ML models. Python knowledge to automate processes Large datasets experience, including data preprocessing, feature engineering, and model evaluation. Agile development of AI solution from concept to deployment to continuous improvement. Create and maintain technical documentation Communicate complex concepts to all stakeholders. At least 3 years of experience in AI … solution engineering. Large Language Models experience including prompt engineering and RAG implementations. Expert data analytics, MLOps practices and API development. Desirable knowledge in Docker and Kubernetes More ❯

collaborating with stakeholders to align solutions with business goals. Key Responsibilities: Define technical architecture and integration patterns across Salesforce clouds. Guide developers in Apex, Lightning Web Components (LWC), and API development. Manage code reviews, CI/CD, and release processes. Partner with Product Owner and Scrum Master for sprint planning and prioritization. Architect & Lead: Define Salesforce technical architecture and … integration strategies across multiple clouds. Guide & Mentor: Support developers in Apex, Lightning Web Components (LWC), and API development. Govern & Deliver: Oversee code quality, peer reviews, CI/CD pipelines, and release management. Collaborate & Align: Partner with Product Owners and Scrum Masters to plan and deliver sprint outcomes. Innovate & Optimise: Introduce best practices in DevOps, performance, and design scalability. Essential … qualifications: Experience: 8+ years in Salesforce development and architecture; Salesforce Certified Technical Architect (CTA) or equivalent experience preferred. Extensive Salesforce development and architecture experience. Proven ability to define and deliver scalable, secure Salesforce solutions. Expertise in Apex, LWC, API integration, and CI/CD processes. Experience leading and mentoring technical teams in an Agile/Scrum environment. More ❯