1 to 25 of 35 API Development Jobs in Central London

the success driving innovation and excellence in our network infrastructure. Essential Technical Skills: Front-end: Angular, TypeScript Back-end: Java, Python, Spring Boot Database: MongoDB, PL/SQL,NOSQL API Development: RESTful APIs Version Control: Git CI/CD: TeamCity Desirable Skills: Docker and Containerization Monitoring and Logging (e.g., Prometheus, Grafana, ELK Stack) Cloud Platforms (AWS, Azure, Google … Cloud) Security and Compliance API Documentation (e.g., Swagger, OpenAPI) Code Quality Tools (e.g., SonarQube) Agile Methodologies (Scrum or Kanban) Soft Skills: Team Collaboration : Ability to work effectively with cross-functional teams, sharing knowledge and expertise. Proactive Approach : Anticipate challenges, identify opportunities, and take initiative to drive progress. Ownership and Accountability : Take ownership of tasks and projects, driving them to … the larger picture. Problem-Solving and Resilience : Drive issues to resolution, navigating complexities without getting bogged down. Training CACI Network Services develops individuals through a portfolio of training and development options such as certified training courses, workshops, technical conferences, boot camps, on-line training and much more. You will have the opportunity to work on some of the most More ❯

React Cloud: Amazon Web Services (AWS) Databases: PostgreSQL, DynamoDB Additional Tools & Frameworks: GraphQL REST APIs Software Design Patterns – TDD, DDD Agile methodologies: Scrum and Kanban Key Responsibilities: Full-Stack Development: Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management: Build scalable, cloud-based solutions using AWS, PostgreSQL, and DynamoDB. API Development: Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns: Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD: Use DevOps processes, including virtualization, containerization, and CI/CD pipelines to streamline development and deployment. Agile Collaboration: Work More ❯

As a Senior Software Engineer, you will play a pivotal role in architecting and developing our next-generation web application and API. This role requires technical leadership, hands-on development, and mentoring of junior developers. You will drive the adoption of best practices, ensuring scalability, security, and performance. If you are passionate about software development, enjoy solving complex … tangible impact. This role will be eligible for visa sponsorship only for candidates that are already based in the UK. Key Responsibilities Technical Leadership: Lead the technical design and development of scalable, secure web applications and APIs, driving best practices across the development lifecycle. Architecture & Design: Oversee system architecture decisions, ensuring alignment with business goals and scalability requirements. … Mentorship: Mentor and guide junior developers, fostering a collaborative learning environment. API Development: Design and build RESTful API endpoints using NodeJS and Express, including detailed API documentation. Database Management: Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability. Full-Stack Development: Develop responsive and performant front-end applications More ❯

Permanent Salary: £90,000-£100,000 per annum plus benefits The Company A well-established organisation within the reinsurance market is seeking a seasoned Technical Lead to guide the development and delivery of robust technology solutions. The role plays a vital part in shaping the technical direction of the business, with a strong focus on regulatory alignment, team leadership … and cross-functional collaboration. This is a hands-on leadership position requiring a strategic thinker with a strong grasp of modern technologies, software development practices, and operational efficiency. The successful candidate will possess a track record of technical excellence, particularly within regulated environments such as Lloyd’s or the wider financial services industry. Overview of Responsibilities: Define and oversee … s, PRA, and FSA). Design and implement systems that support core operational areas such as underwriting, claims, policy management, and data reporting. Take ownership of the full software development lifecycle — from planning and design through to deployment and maintenance. Maintain compliance with data governance standards and IT security best practice. Evaluate technical risks and implement appropriate mitigation strategies. More ❯

and highly collaborative teams where your work will have an immediate and visible impact. You’ll leverage the latest technologies to build powerful solutions, contributing to the full software development lifecycle—from rapid prototyping to full-scale application delivery. Our development approach is lean and agile. We build both quick prototypes (in 2–3 weeks) and production-grade … production systems. Technical Skills Programming Languages: Java, Python, C#, C/C++, JavaScript, Ruby Web Technologies: React, Webpack, SCSS, Node.js, AngularJS Protocols: HTTP, TCP/IP, UDP, SMTP, DNS API Development: REST, SOAP, RPC, RMI Architectures: Microservices, Cloud-Native, Federated Modules, Micro-frontends Mobile/Responsive Development: Expert in adaptive web and mobile solutions Databases: MySQL, SQL … Server, Oracle, Elasticsearch, MongoDB, Cassandra DevOps & CI/CD: Automated testing, Continuous Integration/Delivery, Cloud platforms Tooling & Collaboration Development Tools: JIRA, Splunk, Slack Code Quality: Adheres to DRY principles, TDD practices, and clean code standards Collaboration: Pair programming via HackerRank, Agile ceremonies, cross-functional teamwork Soft Skills & Traits Passion for emerging technologies and innovative problem-solving Strong communication More ❯

reliability and security - Supporting in architecting and expanding the micro-service infrastructure to support business growth and evolving requirements - Oversee the adoption and best practises of Azure technologies, including API management, Service Bus and Azure Functions Team Management: Manage, mentor, and inspire multiple teams of Engineers from differing tech stacks - Working with existing engineers to expand their knowledge of … above skills and is able to discuss and exhibit: Proven experience as a Software Engineering Manager or a Lead Software Engineer within a Retail environment Hands on experience in development with Microsoft Dynamics Experience with Azure, particularly in Middleware and microservice architecture Strong programming background, with proficiency in .NET, node, JavaScript or equivalent languages Hands on experience with API development, Azure Service Bus, Event Grid, and Azure Functions. More ❯

Required Job Type: Full-Time Experience: 8+ years Job Summary : We are seeking a highly skilled and experienced Senior Data Engineer to join our team and contribute to the development and maintenance of our cutting-edge Azure Databricks platform for economic data. This platform is critical for our Monetary Analysis, Forecasting, and Modelling activities. The Senior Data Engineer will … and reliability. This role requires a strong understanding of data engineering principles, big data technologies, cloud computing (specifically Azure), and experience working with large datasets. Key Responsibilities : Data Pipeline Development & Optimisation : Design, develop, and maintain robust and scalable data pipelines for ingesting, transforming, and loading data from various sources (e.g., APIs, databases, financial data providers) into the Azure Databricks … accuracy throughout the data lifecycle. Azure Databricks Implementation: Work extensively with Azure Databricks Unity Catalog, including Delta Lake, Spark SQL, and other relevant services. Implement best practices for Databricks development and deployment. Optimise Databricks workloads for performance and cost. Need to program using the languages such as SQL, Python, R, YAML and JavaScript Data Integration: Integrate data from various More ❯

React Cloud: Amazon Web Services (AWS) Databases: PostgreSQL, DynamoDB Additional Tools & Frameworks: GraphQL REST APIs Software Design Patterns – TDD, DDD Agile methodologies: Scrum and Kanban Key Responsibilities: Full-Stack Development: Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management: Build scalable, cloud-based solutions using AWS, PostgreSQL, and DynamoDB. API Development: Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns: Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD: Use DevOps processes, including virtualization, containerization, and CI/CD pipelines to streamline development and deployment. Agile Collaboration: Work More ❯

React Cloud: Amazon Web Services (AWS) Databases: PostgreSQL, DynamoDB Additional Tools & Frameworks: GraphQL REST APIs Software Design Patterns – TDD, DDD Agile methodologies: Scrum and Kanban Key Responsibilities: Full-Stack Development: Design, develop, and maintain complex full-stack applications across both front-end and back-end. Cloud & Database Management: Build scalable, cloud-based solutions using AWS, PostgreSQL, and DynamoDB. API Development: Integrate RESTful APIs and GraphQL to enable smooth data flow between services. Software Design Patterns: Apply TDD (Test Driven Development) and DDD (Domain Driven Design) best practices to ensure maintainable, efficient code. DevOps & CI/CD: Use DevOps processes, including virtualization, containerization, and CI/CD pipelines to streamline development and deployment. Agile Collaboration: Work More ❯

the backend engineering efforts of our enterprise platforms. This role requires strong architectural acumen, hands-on coding capability, and a leadership mindset to guide teams across the full software development lifecycle. Exposure to mobile application ecosystems, collaboration across cross-functional teams, and experience in the banking or financial services domain will be strong assets. You’ll work closely with … stakeholders to deliver scalable, secure, and maintainable solutions. Key Responsibilities: • Design and develop scalable, secure, and high-performance backend systems using Java, Spring Boot, and modern architectural practices. • Lead development of RESTful APIs and microservices along with mobile platforms, ensuring consistency and alignment with business and UX goals. • Drive integration with API Gateway technologies (e.g., Kong, Apigee, AWS … API Gateway) to enforce access control, rate limiting, and API lifecycle management. • Implement robust authentication and authorization workflows using IDAM platforms such as Ping Identity, Okta, or Auth0, with support for OAuth2, OIDC, and JWT. • Collaborate with mobile app teams to ensure backend services are optimized for mobile-specific use cases such as performance, caching, and offline access. More ❯

Technical Lead – Java Spring Boot – Must have Mobile App Development/Modernisation Location: Hybrid, 1 day a week in London office A leading enterprise organisation that specialises in AI-First solutions is seeking a seasoned Technical Lead with deep expertise in Java Spring Boot, microservices architecture, and solution design to drive the backend engineering strategy for its platform engineering … function. The ideal candidate brings a blend of strong technical leadership, architectural insight, and hands-on development capability, alongside experience collaborating across cross-functional teams. This role involves leading the development of scalable, secure, and maintainable backend systems, especially those supporting mobile ecosystems. Prior experience in the banking or financial services domain is highly advantageous. Must have experience … with API gateways and mobile app development/modernisation Key Responsibilities: Design and develop high-performance, secure, and scalable backend systems using Java, Spring Boot, and modern architectural patterns. Lead the development of RESTful APIs and microservices, ensuring alignment with mobile platforms and business objectives. Integrate with API Gateway solutions (e.g., Kong, Apigee, AWS API More ❯

Job Title: Node.JS Developer Duration: long-term contract Location: Hybrid (London Based) Key Skills: Node.js, Microservices, Google Cloud Platform (GCP), Kubernetes, DevOps, API Gateway, Docker, Express.js, TypeScript, ES6+ Job Description: We’re looking for a highly skilled Node.js Developer to join our dynamic, cloud-native team. You will be responsible for designing, developing, and deploying scalable backend services using … candidate will have strong experience in advanced microservices architecture, modern JavaScript (ES6+), and TypeScript, with a deep understanding of cloud-native application delivery. Must Have: Proven experience in Node.js development for scalable backend systems Deep understanding of Microservices Architecture, including: Advanced microservices patterns (e.g., service discovery, circuit breakers, sidecars) Validation and schema enforcement across microservices API versioning strategies … routing, middleware, and error-handling patterns Proficiency with TypeScript and modern ES6+ JavaScript features Hands-on experience with Docker and Kubernetes for container orchestration and service management Familiarity with API Gateway platforms (e.g., APIGee, Mulesoft, GCP Endpoints) Exposure to Google Cloud Platform (GCP) services (e.g., Cloud Functions, Pub/Sub, IAM) Experience with DevOps tools and CI/CD More ❯

Required Job Type: Full-Time Experience: 10+ years About the Role: We are seeking a highly skilled and versatile Senior Developer to join our team and contribute to the development and maintenance of our cutting-edge Azure Databricks platform for economic data. This platform is critical for our Monetary Analysis, Forecasting, and Modelling activities. The Senior Developer will be … responsible for both front-end and back-end development, with a focus on Python, including the challenging but rewarding task of reverse engineering an existing codebase to integrate new features and improvements. This role requires a strong understanding of software development principles, experience with various programming languages and frameworks, and a passion for building high-quality, scalable, and … maintainable software. Drive the development of MVPs, ensuring timely delivery and alignment with business goals. Key Responsibilities: Full-Stack Development: Contribute to both front-end and back-end development of applications and APIs interacting with the Azure Databricks platform. Develop user interfaces using modern front-end frameworks (e.g., React, Angular, Vue.js) and ensure a seamless user experience. More ❯

ideally Python . Proven experience deploying and maintaining cloud infrastructure on AWS . Confident leading agile delivery teams in high-growth or startup environments. Deep understanding of system design, API development, and performance optimisation. Passion for clean code, scalable architecture, and elegant problem-solving. Strong communication skills with the ability to align technical direction with business needs. Experience More ❯

Software Engineer (API, Data and Cloud) London or Swindon office Hybrid role (2 days a week on site/3 work from home) The banking services that Nationwide provides and the service we give are unrivalled. At the core of this are our digital channels ensuring our members and our customers can interact with us as they choose in … relevant applications, we may close the advert earlier than the advertised date, so please apply as soon as you can. What you’ll be doing As a Cloud Engineer (API & Data), you will be helping shape the Customer Experience & Automation platforms. This group is part of the Chief data & analytics office (CDAO) and part of the overall COO team … all, we’ll give you the accountable freedom you’ll need to propose and deliver the best solution for our members. About you For the role of Cloud Engineer API & Data , we are looking for a demonstrated track record of the end-to-end technical understanding, knowledge, and optimisation of an organisation's technology platform or platforms in Financial More ❯

skilled Power Platform Developer to play a crucial role in designing, developing, and implementing high-quality applications using Microsoft Power Platform. Your proficiency and expertise will extend to SharePoint development and integrating solutions across various Azure services, including Logic Apps, Function Apps, and Cognitive Services. Key responsibilities include creating prototypes and gathering input from stakeholders. You’ll leverage tools … Power Apps & Power Automate Experience with Microsoft Dataverse (formerly Common Data Service) for data modelling and management. Demonstratable experience of producing solutions using various cloud technologies (e.g. Azure) and API development & integration Experience with customization tools in Dynamics 365, including Power Apps, workflows, business rules, and JavaScript Relevant certifications in Power Platform and SharePoint Proficient in Power Apps … Power Automate, SharePoint (SPFx), JavaScript framework (React and/or Angular) Proficiency in programming languages such as C#, JavaScript, or PowerShell for customization and integration purposes Proficient in Azure development such as logic app, azure function, storage, keyvault as well as Azure build and release pipelines. More ❯

value of technology and build a more sustainable, more inclusive world. Your Role We are seeking passionate and experienced Senior Kotlin Developer with strong backgrounds in Spring Boot and API design. The ideal candidates are forward-thinking individuals with a senior developer's mindset, capable of driving complex features end-to-end and collaborating with cross-functional teams to … to deployment. Define technical solutions aligned with business objectives and ensure scalability, security, and maintainability. Create robust, efficient, and scalable APIs for frontend integration. Promote best practices in RESTful API design, documentation, and implementation. Work closely with technical and product stakeholders to clarify requirements and align on deliverables. Translate business needs into technical solutions and maintain clear communication across … teams Proactively identify and address technical challenges, driving continuous improvement in the codebase and processes. Stay updated with the latest trends in Kotlin, Spring Boot, and API design. Work closely with Mobile and Web FE team to build Backend for Frontend that enables faster scalable FE development Your Profile Proficiency in Kotlin and Spring Boot with hands-on More ❯

/CD for data systems, and robust testing methodologies. Highly desirable skills include: Domain Experience: Familiarity with the unique structure of sports data (e.g., event, tracking, scouting, video). API Development: Experience building data-centric APIs, especially with FastAPI on serverless platforms like Google App Engine . Streaming Data: Practical experience building real-time data pipelines. DevOps & MLOps More ❯

/CD for data systems, and robust testing methodologies. Highly desirable skills include: Domain Experience: Familiarity with the unique structure of sports data (e.g., event, tracking, scouting, video). API Development: Experience building data-centric APIs, especially with FastAPI on serverless platforms like Google App Engine . Streaming Data: Practical experience building real-time data pipelines. DevOps & MLOps More ❯

/CD for data systems, and robust testing methodologies. Highly desirable skills include: Domain Experience: Familiarity with the unique structure of sports data (e.g., event, tracking, scouting, video). API Development: Experience building data-centric APIs , especially with FastAPI on serverless platforms like Google App Engine . Streaming Data: Practical experience building real-time data pipelines. DevOps & MLOps More ❯

/CD for data systems, and robust testing methodologies. Highly desirable skills include: Domain Experience: Familiarity with the unique structure of sports data (e.g., event, tracking, scouting, video). API Development: Experience building data-centric APIs, especially with FastAPI on serverless platforms like Google App Engine . Streaming Data: Practical experience building real-time data pipelines. DevOps & MLOps More ❯

is expanding their technology team and seeking an experienced Cloud Integration Developer to join them for a 12-month contract. Role Overview: As part of their growing in-house development team, you'll define, design, and develop new features and capabilities, focusing on cloud services and architectures. The role involves creating tools and apps that enhance their data platform … directly impacting member experiences and back-office processes. Key Responsibilities: Designing scalable cloud architectures for workflow automation Integration of CRM, Finance, and other SaaS products Development of microservices and event-driven architectures Maintaining and improving our current tech stack Technical Requirements: 6+ years' experience in complex, multi-platform environments Strong background in Azure cloud architecture and deployment Proficiency in … TypeScript and Node.js Experience with enterprise middleware technologies Knowledge of API development and management Package & Working Pattern: Salary up to £80,000 per annum Performance-related bonus Comprehensive benefits package 2 days in our London office Fixed-term contract (12 months) Their approach is agile and data-driven, emphasizing collaboration within a cross-functional product team. #CloudComputing #Azure More ❯

maintainability. Core Skills for the Python Software Engineer, Python, AWS | Python, TDD & BDD, Monitoring | £650 - 750pd Outside IR35 | 6-month contract | Fully Remote (UK) Strong Python expertise, especially for API development and testing in cloud environments (preferably AWS). Solid experience with cloud platforms (AWS, Azure, GCP), containerisation, automation, and orchestration tools.Familiar with CI/CD pipelines and More ❯

maintainability. Core Skills for the Python Software Engineer, Python, AWS | Python, TDD & BDD, Monitoring | £650 - 750pd Outside IR35 | 6-month contract | Fully Remote (UK) Strong Python expertise, especially for API development and testing in cloud environments (preferably AWS). Solid experience with cloud platforms (AWS, Azure, GCP), containerisation, automation, and orchestration tools.Familiar with CI/CD pipelines and More ❯

C#.Net Core, MicroServices, API engineer | FX Trading - Greenfield Digital Data Build | £65,000 + strong bonus | Hybrid C#.Net Core engineer, with experience building microservice based applications, needed for a FX trading house. As a C#.net Core engineer, you will get the opportunity to work in the Front Office, building bespoke C#.Net Core applications, providing a wide range of solutions. … providing services for the last 25 years and have grown year on year. They are looking for bright and enthusiastic C#.net developers to help support the growth of their development function. Their C#.net software products are used by their own in-house service team who use the software to help them provide services to their customers offering a wide … the office 4/5 days per week. The office is based close to Old Street Station, London. Experience needed Proficient in C# and .NET Core Experienced with Web API development Developing, deploying, and maintaining microservices Experience in developing containerized microservice architectures using technologies like Docker and Kubernetes Skilled in designing and developing microservices If you would like More ❯