1 to 25 of 138 API Development Jobs in the UK

take full ownership — design, build, test, deploy, and operate — rather than handing work off between silos. In this role, you will focus on standardizing API development through tooling and automation, improving consistency, usability, and integration velocity across services. You will leverage AI‐powered tools to accelerate API … design, validation, and standardization — improving developer workflows and reducing inconsistency at scale. Responsibilities Standardize API development through tooling and automation so the right approach is the default Define and evolve API standards (OpenAPI), and enforce through tooling, automation, and CI/CD workflows (not manual review processes ...

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 ...

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 ...

Role: Development Manager - Digital & API Salary: Up to £100,000 per year + Bonus Location: Surrey Working Pattern: Hybrid - 2 days per week onsite (5 days per week during the first month) We're working with a well-established organisation embarking on a company-wide digital transformation programme … investing heavily in modern technology, API development and engineering capability. This is an excellent opportunity for an experienced Development Manager to lead Digital & API engineering teams through a significant period of change. You'll play a key role in driving modern engineering practices, supporting Agile delivery ...

scale. About the Role As a Founding Engineer, you will have responsibility across the entire technical stack — from architecture and infrastructure through to product development and optimisation. You will operate with a high degree of autonomy, solving difficult engineering problems and establishing the foundations of the company’s technology. … systems. Solve complex technical challenges with speed and precision. Build prototypes, test ideas and rapidly iterate towards production solutions. Establish engineering standards, tooling and development practices. Optimise systems for performance, reliability and scalability. Work directly with founders to shape product strategy and technical direction. Take ownership of projects from ...

backend services, APIs, and integrations that support millions of customer payment journeys every year. Own features end-to-end, taking responsibility for solution design, development, testing, deployment, and production support. Help shape the technical direction of the Payments platform, balancing performance, scalability, resilience, security, and cost through modern engineering … quality, testing, and maintainability. Proficient in driving operational excellence through observability and modern engineering practices. Highest-signal resume keywords Java Engineering Expertise Backend Service Development API Design and Integration CI/CD Implementation Observability and Monitoring Hard Skills Backend Development API Development System Design Scalable ...

.NET Developer – London - £500-550 per day (.NET, C#, SQL, AWS, API Development) We’re working with an industry leading e-commerce site that are looking for several .NET Developers to join them for an initial 6-month projects as part of an ongoing transformation. These roles will … hosted solutions. Working alongside existing engineering teams that already own the services and understand the business logic. Technical requirements C# .NET/.NET Core API development SQL .NET upgrade programmes Cloud-native migrations Interview slots are available for next week. (.NET, C#, SQL, AWS, API Development ...

high-performance authentication and identity services used by millions of customers and colleagues. Own features end-to-end, taking responsibility for solution design, development, testing, deployment, monitoring, and production support. Help shape the technical direction of the Identity Platform, balancing customer experience, security, performance, and developer usability. Develop resilient … significant experience building and operating large-scale distributed systems serving millions of users. Strong experience with Java and/or Kotlin and modern backend development frameworks. in designing and delivering secure, scalable services within cloud-native environments. Strong understanding of DevOps principles, CI/CD pipelines, automation, and operational ...

core banking platform. This is a hands-on contract role where around 90% of your workload will focus on .NET and REST API development , making it ideal for someone who enjoys building robust backend services at scale whilst remaining comfortable working across the full stack. … .NET/C# . This role requires an experienced pair of hands who is comfortable systematically creating and maintaining a large number of API endpoints whilst ensuring code quality, automation and operational readiness throughout the development lifecycle. The engineering team works using Scrum, while the wider programme follows ...

will focus on delivering new functionality, improving existing capabilities, modernising business processes and driving continual improvement across multiple complex enterprise applications. In addition to development and enhancement activities, the role will provide technical expertise in the investigation and resolution of complex application and integration issues, acting as a senior … enjoys solving complex business challenges and contributing to the long‐term evolution of a strategically important enterprise‐scale solutions. Key Responsibilities Solution Design & Development Design, develop and enhance enterprise solutions built on Microsoft Dynamics 365 CE, Dataverse and the Power Platform. Deliver new application capabilities, workflow automation and business ...

technical leadership for the design, build, productionisation and ongoing operation of secure Django-based applications and supporting infrastructure. The role will establish the development processes, coding standards, API standards, security approach, RBAC model and application architecture needed for repeatable delivery. The developer will bring extensive experience in productionising … securing Django applications, embedding automated testing, CI/CD and agile development practices, and creating documentation to support Technical Design Authority (TDA), security assurance and operational handover. Responsibilities Lead the architecture, development and deployment of secure Django applications and associated infrastructure in Azure. Define and embed Django development ...

technical leadership for the design, build, productionisation and ongoing operation of secure Django-based applications and supporting infrastructure. The role will establish the development processes, coding standards, API standards, security approach, RBAC model and application architecture needed for repeatable delivery. The developer will bring extensive experience in productionising … securing Django applications, embedding automated testing, CI/CD and agile development practices, and creating documentation to support Technical Design Authority (TDA), security assurance and operational handover. Responsibilities Lead the architecture, development and deployment of secure Django applications and associated infrastructure in Azure. Define and embed Django development ...

Position Type: Contract Inside IR35 Implementation Partner - TCS/LBG Remote work option Available: 2 Days Onsite Job Description: Your responsibilities: Hands-on development and management of Google Apigee API Management Platform . Design, build, and deploy API proxies , policies, and configurations in Apigee. Implement CI/… pipelines for API life cycle management using tools like Jenkins, GitHub Actions, or Harness. Develop and maintain API security policies (OAuth, JWT, mTLS, rate limiting, threat protection). Automate Apigee deployments and configurations using Infrastructure as Code (IaC) principles. Integrate Apigee with GCP services (Cloud Functions, Pub/ ...

Recognition schemes including Support Centre Heroes and service awards Your future, your role As a Junior Integration Engineer, youll be: Assist in the design, development, testing, deployment, and support of integration solutions using Boomi AtomSphere and Azure Integration Services. Support the delivery and maintenance of integrations across clinical, finance … support integrations involving SQL databases, data warehouses, and other enterprise data sources. Assist with data mapping, transformation, validation, and troubleshooting activities. Assist with API configuration and management activities within Azure API Management (APIM). Your skills: 12 years of experience in application integration, backend software development, API ...

Implementation Partner -TCS/LBG \n Remote work option Available: 2 Days Onsite \n Job Description: \n Your responsibilities: \n \n Hands-on development and management of Google Apigee API Management Platform. \n Design, build, and deploy API proxies, policies, and configurations in Apigee. \n Implement …/CD pipelines for API life cycle management using tools like Jenkins, GitHub Actions, or Harness. \n Develop and maintain API security policies (OAuth, JWT, mTLS, rate limiting, threat protection). \n Automate Apigee deployments and configurations using Infrastructure as Code (IaC) principles. \n Integrate Apigee with ...

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 ...

critical business applications built on modern Microsoft technologies, including .NET 6 and .NET 8. The successful candidate will work within a globally distributed development team, collaborating with both technical and business stakeholders across the UK (London, Bromley, Camberley) and internationally (Singapore, India, New York, and Chicago). The role … stability, performance, and scalability. Work closely with business users, analysts, and technical teams to gather requirements and deliver solutions. Participate in the full software development lifecycle, including design, development, testing, deployment, and support. Collaborate with globally distributed development teams across multiple locations and time zones. Contribute ...

critical business applications built on modern Microsoft technologies, including .NET 6 and .NET 8. The successful candidate will work within a globally distributed development team, collaborating with both technical and business stakeholders across the UK (London, Bromley, Camberley) and internationally (Singapore, India, New York, and Chicago). The role … stability, performance, and scalability. Work closely with business users, analysts, and technical teams to gather requirements and deliver solutions. Participate in the full software development lifecycle, including design, development, testing, deployment, and support. Collaborate with globally distributed development teams across multiple locations and time zones. Contribute ...

retrieval Context engineering Prompt orchestration LLM deployment experience, not just experimentation Azure OpenAI, Ollama and/or Vertex AI Python, FastAPI and REST API development LangChain and/or LangGraph AKS, Kubernetes, Docker and Helm Secure AI development and DevSecOps practices including: RBAC Azure AD Key Vault … environments Not Suitable If Experience is primarily notebooks, research or experimentation No production LLM deployment experience No RAG implementation experience Limited software engineering or API development background If you've built, deployed, secured and evaluated GenAI solutions in production and can explain the architecture and decisions behind then ...

Role: Development Manager - Digital & API Salary: Up to £100,000 per year + Bonus Location: Surrey Working Pattern: Hybrid - 2 days per week onsite (5 days per week during the first month) We're working with a well-established organisation embarking on a company-wide digital transformation programme … investing heavily in modern technology, API development and engineering capability click apply for full job details ...

Join our product team in the Cardiff office, we are looking for someone with extensive API working experience. You are expected, if successful, to work 50% of the week in the office. To be eligible to work our Hybrid working pattern you must be living within a 35 mile … decisions to meet current and future customer needs (including fit-for-use for LLMs). Key to the role will be working with the API Architect and development team to ensure we are building the right thing at the right time. You will work closely with engineering, product ...

about building reusable backend capabilities that enable multiple teams and products. Strong understanding of distributed systems, event-driven architectures, and asynchronous messaging patterns. Designed API-first platforms with GraphQL and REST-based services. Comfortable working with high-volume transactional systems where reliability, performance, and resilience are critical. Core Competencies … driven architectures. Proficient in Java and Kotlin, with a solid understanding of distributed systems and high-volume transactional environments. Highest-signal resume keywords Java Development Kotlin Development Microservices Architecture GraphQL API Design Event-Driven Architecture ATS Optimization Keywords Hard Skills Backend Engineering API Development Distributed ...

Role: Engineering Tech Lead Node.js Architect Location: Sheffield, UK Contract (3 days a week Onsite) Job Description Experience 1015+ years of software development experience with at least 5+ years of hands-on expertise in Node.js and experience lead ing engineering teams and large-scale backend platforms. Job Summary … seeking a highly skilled Engineering Tech Lead Node.js to lead the design, development, and evolution of scalable, high-performance backend systems. The ideal candidate should possess deep technical expertise in the Node.js ecosystem, strong architectural and system design capabilities, and proven experience lead ing engineering teams through complex technical ...

APIs Event-driven architecture Streaming data Distributed systems Real-time data processing About You We're looking for engineers with experience in: Commercial Python development Java development Cloud platforms (GCP preferred, although AWS or Azure experience is also valuable) Docker and containerised applications REST API development ...

Responsibilities Provide technical leadership across development teams to ensure the design and delivery of high-quality, scalable, and maintainable software solutions Lead the design and development of key features, components, and services across the application stack Provide hands‐on guidance in building scalable applications using React, Node.js … implementation plans Collaborate with product owners, business analysts, and stakeholders to refine requirements and define solution approaches Produce and review technical design documentation, API specifications, and architectural artifacts Define and enforce coding standards, development best practices, and quality benchmarks Conduct code reviews to ensure maintainability, performance, and security ...