51 to 75 of 149 API Development Jobs in the UK

Augmented Generation (RAG), and agentic frameworks. Your work will directly impact customer experience, fraud detection, compliance automation, financial advisory, and operational efficiency. YOUR PROFILE Strong programming skills in Python API development (Flask, FastAPI, AWS API Gateway) via REST APIs, event driven architectur Cloud - AWS (preferred)/Google/Azure AWS Step Functions, CloudWatch, Lambda, EKS, Dynamo DB More ❯

such as graduates and juniors Oversee software architecture, ensuring seamless integration with various platforms. Gather and analyse requirements, refining features and technical solutions. Lead the estimation process and ensure development work is accurately scoped. Debug existing code, maintain system performance, and drive best coding practices. Manage defects and oversee their resolution across the development team. Experience : 5+ years … experience in software engineering, with a strong focus on Java development. Experience leading and/or mentoring technical teams within fast-paced, agile environments. Expertise in microservices architecture, REST API development, and security. Experience with version control (GIT preferred) and cloud platforms like AWS. It would be a plus if you also possess previous experience in: TDD/ More ❯

such as graduates and juniors Oversee software architecture, ensuring seamless integration with various platforms. Gather and analyse requirements, refining features and technical solutions. Lead the estimation process and ensure development work is accurately scoped. Debug existing code, maintain system performance, and drive best coding practices. Manage defects and oversee their resolution across the development team. Experience : 5+ years … experience in software engineering, with a strong focus on Java development. Experience leading and/or mentoring technical teams within fast-paced, agile environments. Expertise in microservices architecture, REST API development, and security. Experience with version control (GIT preferred) and cloud platforms like AWS. It would be a plus if you also possess previous experience in: TDD/ More ❯

deploy, and integrate AI-powered features into business applications. The ideal candidate combines technical expertise in software integration with a strong understanding of AI/ML deployment workflows and API-based architectures. Key Responsibilities: Collaborate with engineering and product teams to define requirements, scope, and technical design for AI-driven features. Deploy machine learning models into production environments, ensuring … current with evolving trends in AI integration , MLOps , and enterprise AI adoption . Required Skills & Qualifications: Solid experience in integrating AI or ML models into production environments. Proficiency in API development and integration (REST, gRPC, GraphQL preferred). Familiarity with Python , Java , or similar languages used in model deployment. Experience with ML frameworks (eg, TensorFlow, PyTorch, Scikit-learn More ❯

performance. • Guide and mentor less experienced engineers through feedback, pair programming, and coaching. Tech Stack • Backend: Java, RESTful APIs • Cloud & Deployment: AWS, CI/CD pipelines • Other: Third-party API integrations About You • Have strong Java API development experience. • Supports for best practices such as code reviews, pair programming, and automated testing. • Have experience with cloud services More ❯

performance. • Guide and mentor less experienced engineers through feedback, pair programming, and coaching. Tech Stack • Backend: Java, RESTful APIs • Cloud & Deployment: AWS, CI/CD pipelines • Other: Third-party API integrations About You • Have strong Java API development experience. • Supports for best practices such as code reviews, pair programming, and automated testing. • Have experience with cloud services More ❯

performance. • Guide and mentor less experienced engineers through feedback, pair programming, and coaching. Tech Stack • Backend: Java, RESTful APIs • Cloud & Deployment: AWS, CI/CD pipelines • Other: Third-party API integrations About You • Have strong Java API development experience. • Supports for best practices such as code reviews, pair programming, and automated testing. • Have experience with cloud services More ❯

performance. • Guide and mentor less experienced engineers through feedback, pair programming, and coaching. Tech Stack • Backend: Java, RESTful APIs • Cloud & Deployment: AWS, CI/CD pipelines • Other: Third-party API integrations About You • Have strong Java API development experience. • Supports for best practices such as code reviews, pair programming, and automated testing. • Have experience with cloud services More ❯

performance. • Guide and mentor less experienced engineers through feedback, pair programming, and coaching. Tech Stack • Backend: Java, RESTful APIs • Cloud & Deployment: AWS, CI/CD pipelines • Other: Third-party API integrations About You • Have strong Java API development experience. • Supports for best practices such as code reviews, pair programming, and automated testing. • Have experience with cloud services More ❯

performance. • Guide and mentor less experienced engineers through feedback, pair programming, and coaching. Tech Stack • Backend: Java, RESTful APIs • Cloud & Deployment: AWS, CI/CD pipelines • Other: Third-party API integrations About You • Have strong Java API development experience. • Supports for best practices such as code reviews, pair programming, and automated testing. • Have experience with cloud services More ❯

performance. • Guide and mentor less experienced engineers through feedback, pair programming, and coaching. Tech Stack • Backend: Java, RESTful APIs • Cloud & Deployment: AWS, CI/CD pipelines • Other: Third-party API integrations About You • Have strong Java API development experience. • Supports for best practices such as code reviews, pair programming, and automated testing. • Have experience with cloud services More ❯

join our team and contribute to this exciting journey. Role Overview As a Software Engineer, you will be pivotal in supporting and modernizing our existing systems and driving the development of our new platform(s). As a successful candidate and working in a team, you will be given the freedom to lean as explore new technologies that best … Familiarization : Quickly get up to speed with the current system to provide immediate support and understand its architecture. Modernisation : Assist with the modernisation of existing systems to new platforms. API Development : Collaborate with stake holders to design and develop robust APIs critical for the system transition. AI : Help find opportunities to implement systems that bring efficiencies using AI … Portal Development : Contribute to the design and development of portals to enhance client and partnership experiences. Skills and Experience Required Proficient in .Net, C# and ReactJS , with hands-on experience (3-5 Years) in building robust applications. Strong knowledge of SQL Server , including database design and query optimization. Experience in developing and consuming APIs . Beneficial to have More ❯

.Net Software Developer - Remote (Bristol once a month) - 38,000 - 48,000 & excellent benefits Join an Agile development team working across a range of web and desktop applications for a company who take personal development seriously. A leading IT Services Provider have a requirement for a .Net Software Developer with knowledge of C# and ASP.Net. The role will … be working across a range of .Net solutions, including back-end services, API development and web applications. You will be joining a team delivering high quality software, where there is a genuine culture of continuous learning and development, with real progression opportunities. The team work in an Azure hosted environment. The company have taken a very flexible More ❯

.Net Software Developer - Remote (Bristol once a month) - £38,000 - £48,000 & excellent benefits Join an Agile development team working across a range of web and desktop applications for a company who take personal development seriously. A leading IT Services Provider have a requirement for a .Net Software Developer with knowledge of C# and ASP.Net. The role will … be working across a range of .Net solutions, including back-end services, API development and web applications. You will be joining a team delivering high quality software, where there is a genuine culture of continuous learning and development, with real progression opportunities. The team work in an Azure hosted environment. The company have taken a very flexible More ❯

.Net Software Developer - Remote (Bristol once a month) - £38,000 - £48,000 & excellent benefits Join an Agile development team working across a range of web and desktop applications for a company who take personal development seriously. A leading IT Services Provider have a requirement for a .Net Software Developer with knowledge of C# and ASP.Net. The role will … be working across a range of .Net solutions, including back-end services, API development and web applications. You will be joining a team delivering high quality software, where there is a genuine culture of continuous learning and development, with real progression opportunities. The team work in an Azure hosted environment. The company have taken a very flexible More ❯

managers and Quants to expand our derived data and analytics universe. Contribute to complex low latency Java codebase. Understand Quant library interface and work with Quants to validate deliverables. API Development for Analytics and Data: Work closely with portfolio managers and quant devs to develop and maintain APIs for analytics and data dissemination, ensuring that the trading team … with emerging technologies and introduce improvements to system operations. Participate in code reviews and provide constructive feedback to ensure best practices. KEY REQUIREMENTS 3+ years of experience in backend development, with a focus on real time low latency systems. 3+ years of experience in Java. Strong problem-solving skills and attention to detail. Python experience desirable. Real-time software … development, e.g. with eTrading background. Experience with REDIS, Chronicle and other low latency middleware a plus. Experience with containerization and orchestration tools like Docker and Kubernetes. Experience with CI/CD pipelines and automated deployment processes. Experience with timeseries databases such as Snowflake and MongoDB desirable. Prior experience in finance and macro trading principles is highly desirable. Bachelor's More ❯

Role/Job Title: Mainframe Developer Work Location: London 250 Bishopsgate (on site) The Role As a Mainframe Developer , you will work closely with the technical team on development and implementation journeys. You will be responsible for designing, developing, and maintaining high-performance applications using technologies such as COBOL and CICS web services to support critical business processes. Your … Developer or similar role. Strong knowledge of programming languages, including CICS Web Services, COBOL, JCL, and SQL. Experience with IBM mainframe systems and tools. Good understanding of the software development lifecycle. Ability to work independently and in a team environment. Excellent problem-solving and analytical skills. Strong attention to detail and ability to deliver high-quality work. Effective communication … and collaboration skills. Your Profile Essential Skills/Knowledge/Experience: Experience working in z/OS Connect EE and DB2 Rest with extensive knowledge of CICS Web Services. Development experience using FileAid, Xpeditor, IBM Explorer for z/OS, and Visual Studio. Proficient with SOAP, WSDL, and JSON; comprehensive understanding of SOA and RESTful APIs. Experience with code More ❯

days in the office you must be based locally) c£60,000 per year Pension, Bonuses, Life Insurance, Healthcare etc. Skills and Experience: Extensive experience with web application and API development at a senior level Must be able to mentor more junior members of the team in the absence of the Technical Lead Expert understanding of microservice architecture … scalable and performant solutions Design and develop front end code with a focus on security, accessibility and delivering a great user experience Provide input on key technology, architectural and development decisions The Opportunity: In this role you will have a hands-on role at all stages of the software lifecycle, giving input on planning and solution design, alongside coding … systems to a high standard of security, scalability and performance. The successful candidate will have demonstrable experience working at a senior level across the full stack within a web development team, with a keen attention to detail and strong problem-solving skills. Please note this role will not be fully remote and there is no flexibility on the x2 More ❯

days in the office you must be based locally) c£60,000 per year Pension, Bonuses, Life Insurance, Healthcare etc. Skills and Experience: Extensive experience with web application and API development at a senior level Must be able to mentor more junior members of the team in the absence of the Technical Lead Expert understanding of microservice architecture … scalable and performant solutions Design and develop Front End code with a focus on security, accessibility and delivering a great user experience Provide input on key technology, architectural and development decisions The Opportunity: In this role you will have a hands-on role at all stages of the software life cycle, giving input on planning and solution design, alongside … systems to a high standard of security, scalability and performance. The successful candidate will have demonstrable experience working at a senior level across the full stack within a web development team, with a keen attention to detail and strong problem-solving skills. Please note this role will not be fully remote and there is no flexibility on the x2 More ❯

About the job A technology led organisation in Chester are growing their development team. They are seeking passionate Java Developers to join their team to help create secure, scalable and customer first solutions. Paying up to £80k package per annum you will be based out of their Chester offices 2 days a week. They are looking ideally for Backend … to join their collaborative working environment. If you want to make a real impact - this could be the perfect team for you! Key skills: Strong Java programming with RESTful API development Spring Boot framework experience Cloud based technologies, GCP preferred (Azure or AWS welcome) Build and deploy containerized applications with Docker and Kubernetes CI/CD tools (GitHub More ❯

teams on new features. Influence architecture and technical strategy. Ensure reliability and performance in production. Lead code reviews, improve processes and mentor juniors. Skills & experience 5+ years’ full stack development experience. Strong React and modern JavaScript/TypeScript. Backend API development (Python preferred, Node considered). Cloud deployment (AWS or similar) and database knowledge (MySQL). Strong More ❯

Responsibilities Develop and maintain full stack solutions using Oracle DB Support legacy system migration and ERP integration efforts Build and consume APIs to enhance application functionality Collaborate with offshore development teams to ensure smooth delivery and coordination Contribute to front-end development using modern technologies (e.g., HTML5, CSS3, JavaScript frameworks) Participate in code reviews, testing, and deployment processes … Skills & Experience Required Proven experience in back-end development with Oracle PL/SQL Exposure to ColdFusion or willingness to learn quickly Experience of front-end technologies and frameworks Experience with API development and integration (RESTful services) Familiarity with legacy systems and migration projects Ability to coordinate and communicate effectively with offshore teams The following benefits … employer pension contribution 25 Days annual leave, plus public holidays Life assurance 4x annual salary Flexi-time. Paid volunteering leave Excellent continuous professional development - they cover 100% of new, approved qualifications up to a value of 2800 USD per year, and then cover 75% of qualifications up to a value of 5000 USD per year Flexible benefits allowance at More ❯

ABOUT THE ROLE Work with the team on development and management of applications focused on forecasting, ordering, production, staff planning, transport and online. A hands-on role to deliver applications working with other staff and partners. Collaborate with cross-functional teams to design, develop, and implement scalable and reliable cloud applications. Utilize data science and analytics to enhance application … s degree in Computer Science, Analytics, Engineering, or a related field. Minimum of 1+ years of experience in coding with Python and React.js. Knowledge of databases (SQL & NoSQL) and API development/integration. Familiarity with enterprise architecture design and delivery (Azure, GitHub, etc). Proven experience in building cloud applications using Microsoft Azure/cloud. Strong interest in … days holiday + Bank holiday Pension Scheme Discounts and Savings from high-street retailers and restaurants 24 hour GP service Cycle to work scheme Twice yearly pay review Development programmes for you to RISE with GAIL's More ❯

operations. You will be instrumental in driving revenue growth, optimizing risk management, enhancing customer experiences, and ensuring regulatory compliance on a global scale. Key Responsibilities End-to-End Model Development: Lead the entire ML lifecyclefrom problem framing, data exploration, and feature engineering to model training, validation, deployment, and monitoring in production environments. Advanced Algorithm Design: Develop and implement sophisticated … Regulatory Compliance & Governance: Ensure all models are developed in line with internal Model Risk Management policies and external regulatory requirements (e.g., SR 11-7, GDPR, PSD2). Document model development processes thoroughly for internal and external audits. Innovation: Stay abreast of the latest academic and industry advancements in AI/ML and proactively identify opportunities to apply them within … or conferences. Experience with cloud platforms (AWS SageMaker, Google Vertex AI, Azure ML). Knowledge of graph databases and network analysis techniques. Experience with real-time model inference and API development (e.g., FastAPI, Flask). Personal Attributes Strategic Thinker: Ability to see the "big picture" and align data science projects with business objectives. Exceptional Communicator: Can articulate complex More ❯

ll collaborate with cross-functional teams to deliver high-quality solutions using both modern and legacy technologies. Key Experience required: We're looking for candidates with experience in: Backend Development C# with .NET Core RESTful API development SQL Server and database design Legacy Systems ASP.NET Web Forms (maintenance and migration projects) Integration Integration with third-party services … internal platforms System design and architecture What You'll Bring A proactive mindset and problem-solving attitude Strong communication and collaboration skills Ability to work across the full software development lifecycle Passion for coding and scalable architecture What's on offer? Exciting projects across a wide portfolio of work Opportunity to have full autonomy and own your own work More ❯