19 of 19 API Development Jobs in London

Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed in house … required with expertise in Visual Basic .NET, C#, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities ...

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rdparty products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

Ideally looking for experience in - expertise in LookML Semantic model Development - Development of custom visualisations using Looker API - Development of custom calculations using link vertex AI - Creation of LookML dashboards - Ability to use strong Github expertise TPBN1_UKTJ ...

building and enhancing modern applications, APIs, and cloud-native services, whilst mentoring developers and promoting engineering best practice. Key Responsibilities Lead the design and development of robust, scalable software solutions Drive technical decision-making and provide guidance to development teams Develop and maintain RESTful APIs and microservices Build … quality, automated testing, and CI/CD best practices Support deployment, containerisation, and platform optimisation activities Essential Skills & Experience Strong commercial experience with Node.js API development using REST and OpenAPI Web application development using HAPI Database expertise across PostgreSQL , MongoDB , and Redis Unit testing with Jest ...

data services, and cloud platforms. You will own end-to-end integration architecture, champion modern engineering standards, and guide engineers through best practices in API design, cloud-native development, and scalable integration patterns. This is a hands-on leadership role, ideal for someone who enjoys coding, problem-solving … steering technical direction while mentoring engineers and collaborating with product, data, and platform teams. What You'll Be Doing Lead the design, development, and delivery of integration solutions across a diverse technology ecosystem Develop secure, scalable APIs, services, and messaging-based integrations Champion best practices in engineering, DevOps, automation ...

DevOps enablement and integration of LLM technologies into secure, scalable enterprise environments. The ideal candidate will bring experience of leading engineering teams, practical AI development experience, strong automation skills, and the curiosity to solve emerging engineering challenges in this rapidly evolving space. Key responsibilities: Lead a team … benchmarking, evaluation, and experiment tracking for LLM performance and cost. Contribute to RAG implementations and data access patterns supporting enterprise use cases. Help shape API standards, reusable patterns, and documentation for platform adoption. Troubleshoot and optimise performance across distributed systems and cloud services. Mandatory Skills & Experience: Strong Python engineering ...

operational teams, you'll help shape technical solutions while contributing to a culture of engineering excellence. You'll be involved in the full software development life cycle, from architecture and design through to deployment and operational support, ensuring solutions are scalable, resilient and fit for purpose. Key responsibilities include … robust technical designs Contributing to software and system architecture decisions Building and supporting high-performing CI/CD pipelines and engineering practices Applying modern development standards, clean code principles and secure-by-design approaches Supporting testing, quality assurance and continuous improvement initiatives Collaborating with product managers, designers, security teams ...

stakeholder exposure and the opportunity to influence how AI is adopted across a prestigious financial services environment. Key Responsibilities Lead the technical design and development of AI-driven proof-of-concepts, prototypes and lightweight applications that demonstrate measurable business value. Work directly with senior stakeholders, business teams and technology … software engineering practices. Design and implement integrations across multiple enterprise data sources, systems and applications, establishing scalable and reusable engineering patterns. Leverage AI-assisted development tools, including GitHub Copilot, to accelerate engineering delivery and experimentation. Collaborate with platform engineering, architecture, security and governance teams to ensure solutions align with ...

stakeholder exposure and the opportunity to influence how AI is adopted across a prestigious financial services environment. Key Responsibilities Lead the technical design and development of AI-driven proof-of-concepts, prototypes and lightweight applications that demonstrate measurable business value. Work directly with senior stakeholders, business teams and technology … software engineering practices. Design and implement integrations across multiple enterprise data sources, systems and applications, establishing scalable and reusable engineering patterns. Leverage AI-assisted development tools, including GitHub Copilot, to accelerate engineering delivery and experimentation. Collaborate with platform engineering, architecture, security and governance teams to ensure solutions align with ...

expert in generative AI and financial technology We'll Count on You To: Design and build transformative ML systems – Lead the development of advanced generative AI solutions, agentic workflows, RAG architectures, and intelligent platforms using PyTorch, modern ML frameworks, and large language models; write production-quality code that scales … understanding of MLOps, containerization (Docker, Kubernetes/AWS EKS), cloud platforms (AWS/Azure including Bedrock, SageMaker, Azure AI Search), workflow orchestration (Airflow), and API development for ML systems Software development fundamentals – Deep understanding of automated testing, source version control, code optimization, software architecture, and building scalable ...

experience and knowledge of AI, is data drivenwith has worked withlarge amounts of datawith the ability to review codeandwill blend expertise in software architecture, development, cloud, end user compute, and production operations with a passion for coaching, mentoring, and developing managers and associates. The goal is to evolve … function, that is both market driven and forward thinking, and to ensure the organisation has the technological capability and capacity to enable the agile development and delivery of new and improved products to provide stronger client experiences. You will actively bring new ideas, approaches, and insights to improve ...

engineering with DevOps enablement and hands-on integration of LLM technologies into secure, scalable enterprise environments. The ideal candidate will bring practical GenAI & Agentic development experience, strong automation skills, and the curiosity to solve emerging engineering challenges in this rapidly evolving space. Key Responsibilities Build and maintain Back … benchmarking, evaluation, and experiment tracking for LLM performance and cost. Contribute to RAG implementations and data access patterns supporting enterprise use cases. Help shape API standards, reusable patterns, and documentation for platform adoption. Troubleshoot and optimise performance across distributed systems and cloud services. Mandatory Skills & Experience Strong Python Back ...

ready solutions including testing, CI/CD, logging and documentation. - Provide technical leadership and mentorship to a junior engineer. Essential Skills & Experience - MCP server development and AI agent tooling - Azure OpenAI, Azure AI Search, RAG and prompt engineering - SharePoint Online and Microsoft Graph API - Hybrid semantic/vector … search - Enterprise API development and document processing - Azure (Functions and/or Container Apps) - Entra ID and OAuth/OIDC- CI/CD, testing and production support - Software engineering experience, ideally using Python and/or C#/.NET Desirable Skills - Microsoft 365 Copilot - Microsoft Purview - Enterprise knowledge ...

throughput applications Low-latency engineering experience Strong analytical and mathematical problem-solving ability Experience with cloud platforms, ideally GCP Docker/containerisation experience REST API development experience Experience with event-driven architecture or messaging Exposure to AI, machine learning or AI-enabled systems Strong understanding of performance, reliability ...

operations, including containerization (Docker, Kubernetes/AWS EKS), cloud platforms (AWS/Azure), workflow orchestration (Airflow), automated testing for ML systems, and API development for model deployment Technical leadership and influence – Track record of mentoring and coaching engineers, driving ML initiatives in fast-moving environments, leading through technical ...

consumers, topics, partitions and consumer groups Cloud: AWS application deployment and support DevOps: CI/CD pipeline implementation and automation Containers: Docker APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance … optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway, SQS, SNS and EventBridge Redis and distributed caching CloudWatch, ELK/OpenSearch, Datadog, Prometheus, Grafana or Splunk OAuth 2.0/JWT and API security AWS certification Experience ...

consumers, topics, partitions and consumer groups Cloud: AWS application deployment and support DevOps: CI/CD pipeline implementation and automation Containers: Docker APIs: RESTful API design and development using C# with Open API standard Source Control: GitHub and Azure DevOps Production Engineering: Troubleshooting, monitoring, logging and performance … optimization Highly Desirable Amazon MSK or managed Kafka experience AWS EKS/ECS Terraform/AWS CloudFormation AWS Lambda, API Gateway, SQS, SNS and EventBridge Redis and distributed caching CloudWatch, ELK/OpenSearch, Datadog, Prometheus, Grafana or Splunk OAuth 2.0/JWT and API security AWS certification Experience ...

strong backend/integration background and the confidence to influence technical direction. You should have strong experience with: Java and SQL Backend services and API development System integration and software architecture Automated testing and CI/CD Working across the stack, ideally with Angular or a similar framework ...

London (Hybrid) This is a great opportunity to join a high-growth technology business where you can take ownership of large-scale platform development, influence engineering decisions, and help shape the future of a globally recognised connected technology product. THE COMPANY: This international technology company develops connected consumer products … platform modernisation initiatives. YOUR SKILLS AND EXPERIENCE: You will bring strong capability in: Node.js and TypeScript development. React and Next.js. GraphQL and REST API development. Microservices and event-driven architectures. Kafka or similar messaging technologies. PostgreSQL, MongoDB and Redis. AWS, Docker and CI/CD practices. Strong communication skills ...