26 to 50 of 201 API Development Jobs in London

of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers work on a variety of projects that are central to their digital transformation. This includes rebuilding core … geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like to work at HMLR, a Hiring Manager Q&A session where you can virtually 'meet the team' will be held via Teams on … Responsibilities Lead the design, build, and maintenance of complex digital services and APIs Deputise for the Lead Developer, providing technical leadership and mentorship Influence and improve the team's development practices, CI/CD pipelines, and tooling Collaborate with architects and product managers to ensure technical solutions meet user and business needs Take a holistic view of delivery, ensuring More ❯

presents significant problem solving opportunities for developers who are keen to gain experience working in London’s fast growing fintech ecosystem. Revenir’s core product is a white label API, which enhances the capabilities of banking apps, automatically refunding VAT (Value Added Tax) to customers, typically within 48 hours. Banks are now collaborating with fintechs more than ever to … customer experience through their marketplace. Summary: We are looking for a highly motivated and self-driven engineer to join our Technology team, reporting to the CTO to support the development of our proprietary AI technology and product development. This individual should have knowledge of computer science principles and software engineering to support development of Revenir’s technology. This … supporting role to our experienced technology team who have built and developed an innovative product which utilises a range of AWS services, including Lambda, SQS, Step Functions (Express & Standard), API Gateway, DynamoDB, Bedrock, and SageMaker. Responsibilities: Support API Development: Collaborate with the team to research and contribute to the design documentation of APIs, assisting in understanding requirements More ❯

presents significant problem solving opportunities for developers who are keen to gain experience working in London’s fast growing fintech ecosystem. Revenir’s core product is a white label API, which enhances the capabilities of banking apps, automatically refunding VAT (Value Added Tax) to customers, typically within 48 hours. Banks are now collaborating with fintechs more than ever to … customer experience through their marketplace. Summary: We are looking for a highly motivated and self-driven engineer to join our Technology team, reporting to the CTO to support the development of our proprietary AI technology and product development. This individual should have knowledge of computer science principles and software engineering to support development of Revenir’s technology. This … supporting role to our experienced technology team who have built and developed an innovative product which utilises a range of AWS services, including Lambda, SQS, Step Functions (Express & Standard), API Gateway, DynamoDB, Bedrock, and SageMaker. Responsibilities: Support API Development: Collaborate with the team to research and contribute to the design documentation of APIs, assisting in understanding requirements More ❯

Responsibilities: Design, develop, and maintain high-quality Java applications and microservices. Collaborate with cross-functional teams including product, UX, and QA to deliver innovative solutions. Participate in full software development lifecycle: analysis, design, development, testing, deployment, and support. Ensure code quality through unit testing, code reviews, and adherence to best practices. Troubleshoot, debug, and optimize applications for performance … programming and design patterns. Experience with Spring Framework (Spring Boot, Spring MVC, Spring Data) . Experience with relational databases (e.g., MySQL, PostgreSQL) and writing SQL queries. Knowledge of RESTful API development and integration. Familiarity with version control systems, preferably Git . Understanding of Agile/Scrum methodologies. Desirable Skills: Experience with cloud platforms (AWS, Azure, or GCP). … to £80,000. Hybrid working with 3 days in the London office. Opportunity to work on innovative projects in the travel industry. Collaborative and supportive team environment. Learning and development opportunities to grow your career. More ❯

Responsibilities: Design, develop, and maintain high-quality Java applications and microservices. Collaborate with cross-functional teams including product, UX, and QA to deliver innovative solutions. Participate in full software development lifecycle: analysis, design, development, testing, deployment, and support. Ensure code quality through unit testing, code reviews, and adherence to best practices. Troubleshoot, debug, and optimize applications for performance … programming and design patterns. Experience with Spring Framework (Spring Boot, Spring MVC, Spring Data) . Experience with relational databases (e.g., MySQL, PostgreSQL) and writing SQL queries. Knowledge of RESTful API development and integration. Familiarity with version control systems, preferably Git . Understanding of Agile/Scrum methodologies. Desirable Skills: Experience with cloud platforms (AWS, Azure, or GCP). … to £80,000. Hybrid working with 3 days in the London office. Opportunity to work on innovative projects in the travel industry. Collaborative and supportive team environment. Learning and development opportunities to grow your career. More ❯

Responsibilities: Design, develop, and maintain high-quality Java applications and microservices. Collaborate with cross-functional teams including product, UX, and QA to deliver innovative solutions. Participate in full software development lifecycle: analysis, design, development, testing, deployment, and support. Ensure code quality through unit testing, code reviews, and adherence to best practices. Troubleshoot, debug, and optimize applications for performance … programming and design patterns. Experience with Spring Framework (Spring Boot, Spring MVC, Spring Data) . Experience with relational databases (e.g., MySQL, PostgreSQL) and writing SQL queries. Knowledge of RESTful API development and integration. Familiarity with version control systems, preferably Git . Understanding of Agile/Scrum methodologies. Desirable Skills: Experience with cloud platforms (AWS, Azure, or GCP). … to £80,000. Hybrid working with 3 days in the London office. Opportunity to work on innovative projects in the travel industry. Collaborative and supportive team environment. Learning and development opportunities to grow your career. More ❯

Responsibilities: Design, develop, and maintain high-quality Java applications and microservices. Collaborate with cross-functional teams including product, UX, and QA to deliver innovative solutions. Participate in full software development lifecycle: analysis, design, development, testing, deployment, and support. Ensure code quality through unit testing, code reviews, and adherence to best practices. Troubleshoot, debug, and optimize applications for performance … programming and design patterns. Experience with Spring Framework (Spring Boot, Spring MVC, Spring Data) . Experience with relational databases (e.g., MySQL, PostgreSQL) and writing SQL queries. Knowledge of RESTful API development and integration. Familiarity with version control systems, preferably Git . Understanding of Agile/Scrum methodologies. Desirable Skills: Experience with cloud platforms (AWS, Azure, or GCP). … to £80,000. Hybrid working with 3 days in the London office. Opportunity to work on innovative projects in the travel industry. Collaborative and supportive team environment. Learning and development opportunities to grow your career. More ❯

complement the existing suite of trading products. Role responsibilities and key accountabilities: Demonstrates good knowledge of technologies and/or SME knowledge of a technology, advising others on design, development and implementation. Advances tools and applications by producing expert code and producing the right solutions needed. Handles own workload and promotes an inclusive and open culture. Is regarded as … the point of contact in their domain by showing significant depth of knowledge and expertise in software development and develops further knowledge of other domains to act on linkages and dependencies. Understands how the technology/domain strategy relates to and impacts own work, supporting the implementation of strategy and culture within all work. Supports strategy definition where appropriate. … experience designing and building buy or sell side trading systems. Strong understanding of system architecture and design. Strong Java fundamentals (JVM, multithreading, collections, I/O, etc). Strong development experience in Java technology stack along with API development, Docker and Kubernetes. Strong technical experience on writing clean code, unit tests, code reviewing and refactoring. Good knowledge More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

Senior API/PHP Developer – Fully Remote (UK) – £80,000+ Venchr is partnering with a fast-growing SaaS company that’s redefining financial management in the luxury and yachting sector. Their platform unites accounting, payments, FX, and project management into a single, powerful ecosystem — helping clients worldwide streamline complex operations with ease. They’re now seeking a Lead PHP … Developer with a strong focus on API architecture and backend systems to join their fully remote UK-based engineering team. In this role, you’ll take ownership of designing, developing, and optimizing APIs that power mission-critical services. You’ll collaborate closely with product, DevOps, and frontend teams to ensure the platform remains scalable, secure, and future-proof. Beyond … hands-on coding, you’ll play a key part in setting technical standards, mentoring other engineers, and driving forward the API and integration strategy that underpins the company’s growth. What You’ll Bring Proven experience leading backend/API development using PHP and Laravel Expertise in RESTful API design, versioning, authentication, and performance optimization Strong More ❯

automation opportunities. Skilled in creating process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies. Python Development - Strong proficiency in Python programming including object-oriented design, asynchronous programming, error handling, and writing clean, maintainable code. Experience with key libraries including Pandas, NumPy for data manipulation, requests … in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework for exposing AI models and automation services. Experience with API authentication … OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing for information extraction, document classification, and building end-to-end pipelines for automated document ingestion, processing, and data More ❯

work with your colleagues, stakeholders and third parties, to align on requirements and deliver a user experience you can be proud of. The role requires demonstrable experience of backend development using PHP and MySQL, and includes full lifecycle development of RESTful APIs and web apps which can operate at scale on AWS. You will appreciate the benefits of … Experience of software architecture and presenting technical designs to your team and stakeholders. Excellent communicator with a self-starter attitude and comfort working autonomously. Demonstrable expertise and understanding of API development/design and experience interfacing with disparate systems. Applicable understanding of software security, common exploits and secure development practices, including the OWASP Top 10. Proven and More ❯

TDD, BDD) Seek out ways to measure the impact your solutions have on the business and use them to inform future workSkills and Experience Specification Essential : Experience of application development using Python (FastAPI desirable) Relevant qualifications and experience i.e. BSc in Computer Science or Engineering, Software Development certifications, etc. Demonstrable experience in configuring and developing complex software solutions … Strong understanding of object-oriented programming and test driven development (TDD and BDD) Strong understanding of agile software engineering practices Appetite for continual experimentation & learning Desirable : Experience of AWS or Azure Hands-on knowledge of Domain Driven Design (DDD) Some experience with frontend technologies such as HTML, CSS, HTMX, React Experience of C# with .NET Web and API development Understanding of git, CI/CD and DevOps practices and experience in Observability/monitoring Any knowledge of Actuarial/Commercial Insurance Some exposure to or interest in Terraform and deployment pipelines in AWS or Azure Awareness of modern software techniques such as integration patterns, microservices, containerisationWhat We OfferThe Tokio Marine HCC Group of Companies offers a More ❯

Are you a technically minded problem-solver with a passion for learning and development? This is a brilliant opportunity for a Tech Support Developer with around three years of experience to join a fast-moving, innovative tech company working on fascinating, real-world challenges. Tech Support Developer/Software Engineer Based: London (3 days in office) js and backend … systems, with the chance to get involved in other areas of development as your skills grow. Investigate, troubleshoot, and resolve production issues across front-end, back-end, and infrastructure layers js, React, SQL, and AWS to maintain and enhance platform functionality js development Proficiency in TypeScript and JavaScript Experience with React , Express , and REST API development Strong understanding of SQL and Git Bonus Experience (Nice to Have): AWS (hosting, deployment, configuration) Agile development practices Experience in technical customer support Knowledge of software testing (manual and automated) Exposure to ticketing or booking software Android development experience Familiarity with DataDog or other monitoring tools More ❯

UK is investing heavily in modernising its technology platforms and adopting agile, cloud-native solutions. We are seeking a Tech Lead to help drive this transformation and lead the development of scalable, secure, and high-performing systems. Role Overview As Tech Lead, you will be responsible for the technical leadership of a cross-functional agile team. You will guide … software architectural decisions, contribute hands-on to development, mentor engineers, and ensure the delivery of robust software aligned with business objectives. Key Responsibilities Lead the design and development of enterprise-grade applications using Java and related technologies Define and enforce agreed coding standards, architectural principles, and engineering best practices Collaborate with Product Owners, Business Analysts, Solution Architects and … experience as a Tech Lead or Senior Java Developer in agile environments Strong understanding of Agile framework & principles Strong proficiency in Java (preferably Java 17+), Spring Boot, and RESTful API development Experience with cloud platforms (AWS preferred), containerization (e.g. Docker, Kubernetes) and microservices architecture Familiarity with CI/CD tools such as Jenkins, AWS CodePipeline, GitLab CI, or 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 ❯

CI/CD, testing, and automation. What Were Looking For Comp Sci or STEM Degree from a Top Russell group University 3-5 years of experience in full-stack development, with a focus on Python and Django . Strong experience with React or React Native for building dynamic, responsive front-end applications. Proficiency in SQL databases (PostgreSQL/MySQL … practices and familiarity with tools such as Docker , Kubernetes , and cloud platforms ( AWS/GCP/Azure ). Knowledge of Node.js and building scalable back-end services. Experience in API development and integrating third-party APIs. Familiarity with Agile methodologies, version control (Git), and CI/CD pipelines. Bonus: Experience in the PropTech sector or working with property … Offer Competitive salary A fast-paced, collaborative, and innovative start-up environment. Flexible working hours and remote/hybrid options. Opportunity to shape the tech stack and architecture. Personal development budget and training opportunities. More ❯

A public sector organisation is looking for a skilled SharePoint Developer to join their Development and Testing team. This is a key role for someone passionate about building high-quality, scalable applications using SharePoint, Microsoft 365, and Azure services. If you enjoy solving complex problems and collaborating across teams to deliver impactful digital solutions, we'd love to hear … governance, and promoting best practices across the organisation. Responsibilities Design and Customize SharePoint Solutions: Develop tailored solutions using SharePoint and M365 product to address specific business requirements Custom SharePoint Development: Create custom SharePoint apps, Teams apps, and web parts using the SPFx framework (React). Additionally, utilize Power Apps, Power Automate, and related technologies. Application Maintenance: Utilize DevOps practices … security of SharePoint environments Configurating and deployment: performing site configuration for new installations, deploying custom features, and staying up to date with the latest SharePoint developments and upgrades. Secure Development Practices: Developing clean, reusable, scalable, and maintainable code following the Software Development Life Cycle (SDLC). Conducting peer code reviews upon request and adhering to development coding More ❯

A public sector organisation is looking for a skilled SharePoint Developer to join their Development and Testing team. This is a key role for someone passionate about building high-quality, scalable applications using SharePoint, Microsoft 365, and Azure services. If you enjoy solving complex problems and collaborating across teams to deliver impactful digital solutions, we'd love to hear … governance, and promoting best practices across the organisation. Responsibilities Design and Customize SharePoint Solutions: Develop tailored solutions using SharePoint and M365 product to address specific business requirements Custom SharePoint Development: Create custom SharePoint apps, Teams apps, and web parts using the SPFx framework (React). Additionally, utilize Power Apps, Power Automate, and related technologies. Application Maintenance: Utilize DevOps practices … security of SharePoint environments Configurating and deployment: performing site configuration for new installations, deploying custom features, and staying up to date with the latest SharePoint developments and upgrades. Secure Development Practices: Developing clean, reusable, scalable, and maintainable code following the Software Development Life Cycle (SDLC). Conducting peer code reviews upon request and adhering to development coding More ❯

paced, collaborative environment and grow your skills. Key Responsibilities: Develop and maintain scalable applications using Python (Django). Build and integrate APIs and third-party services. Participate in Agile development cycles and CI/CD processes. Optimize applications for performance and scalability. Collaborate with cross-functional teams. Requirements: Computer Science or STEM degree from a top Russell Group University … 1st or 2:1). 5+ years of full-stack development experience (Python/Django). Strong experience with SQL databases (PostgreSQL/MySQL). Familiarity with DevOps tools (Docker, Kubernetes, AWS/GCP/Azure). Experience with API development and Git. More ❯

Are you a technically minded problem-solver with a passion for learning and development? This is a brilliant opportunity for a Tech Support Developer with around three years of experience to join a fast-moving, innovative tech company working on fascinating, real-world challenges. Tech Support Developer Salary: £50k Based: London (3 days in office) In this varied and … run smoothly. You’ll work closely with the engineering team, gaining hands-on experience with Node.js and backend systems, with the chance to get involved in other areas of development as your skills grow. Key Responsibilities: Investigate, troubleshoot, and resolve production issues across front-end, back-end, and infrastructure layers Collaborate with clients, customer success, and engineering teams to … platform functionality Contribute to improving support processes, documentation, and system reliability Continuously develop your technical knowledge across a range of technologies Required Skills & Experience: 3+ years’ experience in Node.js development Proficiency in TypeScript and JavaScript Experience with React , Express , and REST API development Strong understanding of SQL and Git Excellent analytical and problem-solving skills A genuine More ❯