26 to 50 of 117 API Development Jobs in the UK

maintain world-class SDKs and developer tools. LOCATION Fully remote OPPORTUNITY We're seeking a passionate and skilled Software Engineer to contribute to the development of SDKs used by millions of developers worldwide. You'll be working with cutting-edge technologies, building the tools that empower developers to create … globe. If you're eager to learn, collaborate, and make a difference in the developer community, we encourage you to apply! Key Responsibilities SDK Development : Develop high-quality, well-documented SDKs using JavaScript/TypeScript (and potentially other languages), covering front-end, back-end, libraries, APIs, and tools. Code ...

applications. This is a highly collaborative role for someone with a passion for software craftsmanship and continuous improvement. Using your 5+ years of backend development experience, you'll enhance core product features, design scalable systems, and work closely with relevant stakeholders to deliver technical solutions that drive real value. … Beyond your individual contributions, you'll mentor junior developers, champion best practices, and drive meaningful improvements in our development processes and tools. This is an opportunity to make a real impact; both through the systems you build and the team culture you help shape. As a Senior Backend Developer ...

databases infrastructure capabilities work. • Expertise in infrastructure components, performance tuning, and capacity planning. • Understanding of, and hands on experience of, micro services, software development, infrastructure automation, api development and basic application system’s design. • Strong understanding experience on Site Reliability Engineering, DevOps Capabilities (CI/CD/ ...

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 … 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. ...

engineers and workflow architects to translate business challenges into technical solutions. • Ensure adherence to secure coding practices, including authentication, credential management, data protection, and API security. About You Python Development: Proficient in Python 3.x (OOP, data structures, exception handling, modules); experience with requests, pandas, numpy, asyncio, FastAPI/… automation. (Guardrails and Prompt engineering experience added advantage) Authentication & Security: Experience with MSAL authentication, secure coding practices (Key Vault, input validation, encryption), RBAC, and API key/credential management. Data Handling & Storage: Skilled in structured/unstructured data (CSV, JSON, XML, PDF, DOCX); efficient data processing and storage using ...

provider is looking for a Full Stack Engineer (Web & Data) to join its growing Automation & Analytics team in London. This hybrid role blends web development with data engineering, offering exposure to everything from dynamic front‐end interfaces and API development to cloud‐based data pipelines and analytics … platforms. If you love combining creativity in web development with the logic and scalability of data engineering, this is your opportunity to grow in a cutting‐edge environment. What You'll Do Design, develop, and maintain end‐to‐end web applications—from intuitive front‐end interfaces to robust back ...

provider is looking for a Full Stack Engineer (Web & Data) to join its growing Automation & Analytics team in London. This hybrid role blends web development with data engineering, offering exposure to everything from dynamic front‐end interfaces and API development to cloud‐based data pipelines and analytics … platforms. If you love combining creativity in web development with the logic and scalability of data engineering, this is your opportunity to grow in a cutting‐edge environment. What You’ll Do Design, develop, and maintain end‐to‐end web applications —from intuitive front‐end interfaces to robust back ...

strong growth and ongoing investment in their technology, they're looking to add another talented Full-Stack .NET Developer to their agile development team. The Role You'll play a key role in designing and building scalable, secure, and high-quality software solutions. Working closely with Product Owners … fellow engineers, you'll contribute to all stages of development - from concept and design through to deployment and continuous improvement. Delivering high-quality, maintainable code that meets performance and security standards. Collaborating with designers, developers, and stakeholders in an agile team environment. Participating in sprint planning and design sessions ...

components. Collaborate with product, engineering, and QA teams to deliver secure, scalable solutions. Support the migration and refactoring of legacy ColdFusion code to modern development standards. Troubleshoot performance issues, implement fixes, and ensure best practices in coding and testing. Contribute to documentation, code reviews, and continuous improvement initiatives. ColdFusion …/CFML (Adobe ColdFusion or Lucee). Proficient in SQL and relational databases such as MySQL, PostgreSQL, or SQL Server. Solid understanding of REST API development, integrations, and modern application architecture. Familiarity with JavaScript frameworks (e.g., Vue.js, React) and front-end best practices. Experience with Git, CI/ ...

Practical experience in MuleSoft API Development, MuleSoft Flow development and MuleSoft cloud hub Demonstrate good proficiency working with the MuleSoft Anypoint Platform MuleSoft Certified: MuleSoft MCD or MCA certification Knowledge of API-management and micro-services 15 to 20+ years hands on experience in integration development ...

their search for a Senior Full Stack Developer to join their team on a permanent basis. The successful candidate will have strong full-stack development experience, including system integrations, and will be capable of designing, developing, and implementing technical solutions that enhance business processes. Key Skills & Experience Proven experience … full-stack development (Front End and Back End) Strong proficiency in JavaScript, React, Node.js, HTML, CSS, and SQL Experience with API development and cloud-based systems , preferably AWS (Lambda, S3, Redshift) Python programming experience Excellent analytical and problem-solving skills Strong communication and collaboration abilities Degree ...

develop new functionality and make non-functional improvements to our products and services. Understand business requirements and how they translate into technical design and development projects and tasks. Participate in architectural and design discussions and diagnose and troubleshoot complex technical issues Work with stakeholders to progress and report … projects and tasks Building Voice Agents: Developing and maintaining our Go-based Voice Agent API Development: Contributing to our unified AI API that acts as the gateway between our telephony products and various AI providers Tool Creation: Developing "Tools" (Function Calling) that allow LLMs to interact with ...

develop new functionality and make non-functional improvements to our products and services. Understand business requirements and how they translate into technical design and development projects and tasks. Participate in architectural and design discussions and diagnose and troubleshoot complex technical issues Work with stakeholders to progress and report … projects and tasks Building Voice Agents: Developing and maintaining our Go-based Voice Agent API Development: Contributing to our unified AI API that acts as the gateway between our telephony products and various AI providers Tool Creation: Developing "Tools" (Function Calling) that allow LLMs to interact with ...

refine existing applications to improve reliability and user experience - Collaborate with clinical, firmware and engineering teams to deliver user-centric solutions - Lead the development of new features and enhance existing functionality - Contribute to architectural decisions and help shape the broader technical strategy Requirements: - 5+ years of full-stack development … years working with React/Vue, Nuxt/Next, Node.js, TypeScript, PostgreSQL and Redis - 5+ years developing mobile applications using Ionic - Strong experience in API development, authentication and database design (DynamoDB and PostgreSQL) - Demonstrable technical excellence via public demos, project pages, open-source contributions, etc. - Strong problem-solving ...

Developer Location: London, 1-2 days every 2 weeks Duration: until 2-Jan-27 Rate: £(Apply online only) per day - umbrella only Required Skills: API Development: Design, develop, and maintain robust, scalable APIs using modern frameworks and technologies. Azure Logic Apps: Configure and integrate Azure Logic Apps … JavaScript, PowerShell & C# Azure Security: Implement and adhere to best practices in Azure security, including identity management, access control, and threat protection. Front-End Development: Build responsive and user-friendly front-end interfaces using frameworks such as React, Angular, or Vue.js. Back-End Development: Develop and maintain server ...

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 … 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 ...

networking and compliance. Collaborate with Agile teams to deliver high-quality, secure software at scale. Key Skills: Strong Node.js/NestJS and REST API development experience. Skilled in AWS Build and evolve backend services that support login, MFA, and client authentication Proficient with IaC, CI/CD (CloudFormation ...

networking and compliance. Collaborate with Agile teams to deliver high-quality, secure software at scale. Key Skills: Strong Node.js/NestJS and REST API development experience. Skilled in AWS Build and evolve backend services that support login, MFA, and client authentication Proficient with IaC, CI/CD (CloudFormation ...

their search for a Senior Full Stack Developer to join their team on a permanent basis. The successful candidate will have strong full-stack development experience, including system integrations, and will be capable of designing, developing, and implementing technical solutions that enhance business processes. Key Skills & Experience Proven experience … full-stack development (Front End and Back End) Strong proficiency in JavaScript, React, Node.js, HTML, CSS, and SQL Experience with API development and cloud-based systems , preferably AWS (Lambda, S3, Redshift) Python programming experience Excellent analytical and problem-solving skills Strong communication and collaboration abilities Degree ...

experienced Full Stack .Net (C#) Developer, with solid experience in API development , keen to take ownership of end-to-end development, contribute to product innovation, and grow in a tech-led, agile team that genuinely values your input? Are you keen to work in a full stack … building smart APIs, delivering seamless user experiences, and solving real-world customer challenges. This is your chance to take ownership of end-to-end development, contribute to product innovation, and grow in a tech-led, agile team that genuinely values your input. CLICK APPLY and send a CV through. ...

successful candidate will work on an Electronic Trading Platform for the FIC business . This is an exciting opportunity to contribute to the development and integration of advanced trading technologies in a prestigious and fast-paced environment. Our client are in the process of a large multi year … Experience developing, maintaining, or supporting electronic foreign exchange (E-FX) trading platforms. Messaging Protocols: Familiarity with FIX protocol, MQ, JMS, or similar messaging solutions. API Development: Experience with RESTful and/or SOAP web services. Low Latency Programming: Understanding of techniques for minimizing latency in trading applications. Spring ...

basis. The successful candidate will work on an Electronic Trading Platform for the FIC business. This is an exciting opportunity to contribute to the development and integration of advanced trading technologies in a prestigious and fast-paced environment. Our client are in the process of a large multi year … Experience developing, maintaining, or supporting electronic foreign exchange (E-FX) trading platforms. Messaging Protocols: Familiarity with FIX protocol, MQ, JMS, or similar messaging solutions. API Development: Experience with RESTful and/or SOAP web services. Low Latency Programming: Understanding of techniques for minimizing latency in trading applications. Spring ...

currently working with a London-based financial services client who are actively seeking a senior Python developer to work on the development of a business critical application within the risk space. What you'll need to succeed : Extensive Python application development experience within financial services - must have. Strong … API development experience. Strong experience with Django or similar. Javascript experience - nice to have. Strong risk knowledge, and a good mathematical background. Extensive experience working with and analysing large quantities of data. Strong SQL experience. What you'll get in return: Up to £900pd umbrella. London-based hybrid ...

seeking a highly skilled and innovative Agentic AI Engineer to join our team and drive the development and deployment of cutting-edge generative AI solutions within the Microsoft ecosystem . This position is well-suited for candidates with a background in software engineering, data science, or machine learning … applications utilizing Microsoft platforms such as M365, Copilot Studio, and Azure AI Foundry, and have at least one year of relevant experience. Strong software development background with proficiency in Python. Experience with API development using FastAPI, Flask, or Django. Knowledge of Docker and containerized deployments. Hands ...

experienced Full Stack .Net (C#) Developer, with solid experience in API development , keen to take ownership of end-to-end development, contribute to product innovation, and grow in a tech-led, agile team that genuinely values your input? Are you keen to work in a full stack ...