api developer jobs in London

We are working with an established organisation that is continuing to invest heavily in its technology capability and is looking to hire an API & Integration Developer.This is a hands on engineering role with responsibility for designing, developing and maintaining modern API and integration services across a cloud based Microsoft environment.The RoleYou...

Ncounter is seeking an Infrastructure Developer who sits between software engineering and large-scale infrastructure to build API-driven infrastructure services. You will write production-grade Python and design integrations across cloud, bare metal, networking and storage, focusing on automation and self-service.You will design and develop integrations...

We are working with an established organisation that is continuing to invest heavily in its technology capability and is looking to hire an API & Integration Developer.This is a hands on engineering role with responsibility for designing, developing and maintaining modern API and integration services across a cloud based Microsoft environment.The RoleYou...

Job DescriptionImmediate need API developer in London UK - Contract opportunity initally for 6 months

Senior Mulesoft POD Lead to drive API integration and automation delivery using the Mulesoft Anypoint Platform. This onshore role will lead a team delivering 2-3 integrations per month while establishing best practices and ensuring sustainable solution design.Responsibilities:Lead a POD of 2-3 Mulesoft developers in integration deliveryDesign API-led...

Ncounter Limited is seeking an experienced Infrastructure Developer who blends software engineering with large-scale infrastructure. You will implement production-grade Python services, API layers, and automation to reduce manual toil.Work spans CMDB-driven provisioning, integration across compute, networking, storage and cloud, plus event-driven workflows...

Overview Modo Energy is building the data and AI infrastructure behind the energy transition — ingesting global energy datasets and powering APIs, analytics platforms, and LLM-driven systems that understand real-world power markets. Our data platform processes huge volumes of energy market data and makes it available across the company — powering...

Overview Modo Energy is building the data and AI infrastructure behind the energy transition — ingesting global energy datasets and powering APIs, analytics platforms, and LLM-driven systems that understand real-world power markets. Our data platform processes huge volumes of energy market data and makes it available across the company — powering...

Solirius Reply is seeking an experienced Node Developer to join our team in delivering robust back‑end services. You will design, implement, and maintain server‑side applications and APIs, while collaborating with front‑end teams to ensure seamless user experiences.The role emphasizes strong JavaScript/Node.js skills, API design, and cloud familiarity,...

Solirius Reply is seeking an experienced Node Developer to join our team in delivering robust back‑end services. You will design, implement, and maintain server‑side applications and APIs, while collaborating with front‑end teams to ensure seamless user experiences.The role emphasizes strong JavaScript/Node.js skills, API design, and cloud familiarity,...

Java Developer / Backend Software Engineer (Kafka API) London / WFH to £90kAre you a Java technologist seeking a role where you can work on ground breaking technology, continually learning and progressing your career?You could be joining a global technology consultancy.What's in it for you: Salary to £90kHybrid working (x2 days WFH per week)Pension, Life...

A modern tech firm is seeking a proactive PHP Developer Intern to join their development team in Greater London. This role offers a fantastic opportunity to gain real-world experience in backend and web application development using PHP. Interns will collaborate with experienced developers on live projects, enhance their skills in PHP, MySQL, and frameworks,...

Senior Full Stack Engineer / Developer (TypeScript React API Rust) London onsite to £120kOpportunity for a Senior / Founding Full Stack Developer to join a fast growing sports technology business as it establishes its new UK operation.The company sits at the intersection of sports, data, digital insights and betting, working across major US sports including...

Penguin Random House in London is seeking an experienced Software Development Manager to lead the Technology team's Integration Services from their Embassy Gardens office. This hands‑on leadership role blends people management with technical direction to deliver reliable, scalable software and modernise the integration landscape.Around 70% of time is...

Software Developer – Backend API ServicesDepartment: Dev & EngineeringEmployment Type: Full TimeLocation: United KingdomDescriptionAbout Intermedia: Intermedia has established itself as a leading provider of cloud communications and collaboration tech that allows companies to connect better. We have a strong track record of growth, profitability, and...

Penguin Random House in London is seeking an experienced Software Development Manager to lead our Technology team, combining people management with technical direction to deliver reliable, scalable software.You’ll spend about 70% on people leadership, capability building and delivery leadership, and around 30% on hands-on technical contribution, guiding...

A global energy trading company is seeking a .NET Developer to join their Front Office Quantitative Engineering Team. This permanent role focuses on building and maintaining high-performance analytics platforms utilized by traders. Candidates should have strong .NET skills, experience in API development, and a Computer Science degree is preferred. The role...

Penguin Random House in London is seeking an experienced Software Development Manager to lead the Technology team's Integration Services from their Embassy Gardens office. This hands‑on leadership role blends people management with technical direction to deliver reliable, scalable software and modernise the integration landscape.Around 70% of time is...

A global energy trading company is seeking a .NET Developer to join their Front Office Quantitative Engineering Team. This permanent role focuses on building and maintaining high-performance analytics platforms utilized by traders. Candidates should have strong .NET skills, experience in API development, and a Computer Science degree is preferred. The role...

Software Developer – Backend API ServicesDepartment: Dev & EngineeringEmployment Type: Full TimeLocation: United KingdomDescriptionAbout Intermedia: Intermedia has established itself as a leading provider of cloud communications and collaboration tech that allows companies to connect better. We have a strong track record of growth, profitability, and...