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        1,155 Contract API jobs in Europe + 20 miles

        BACKEND SOFTWARE ENGINEER

        GAME RETAIL LIMITED
        East Midlands
        Competitive
        This is an exciting opportunity to contribute to the development of our cutting-edge MACH-based digital platform (Microservices, API-first, Cloud-Native, and Headless), which powers over 50 websites and Mobile Applicationsincluding some of the biggest names in retail.
        This is an exciting opportunity to contribute to the development of our cutting-edge MACH-based digital platform (Microservices, API-first, Cloud-Native, and Headless), which powers over 50 websites and Mobile Applicationsincluding some of the biggest names in retail.
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        NEW
        Hands-on experience with Microsoft Azure and associated PaaS services (e.g., Azure Functions, AKS, API Management). * Strong expertise in RESTful API design, versioning, testing, and lifecycle management.
        Hands-on experience with Microsoft Azure and associated PaaS services (e.g., Azure Functions, AKS, API Management). * Strong expertise in RESTful API design, versioning, testing, and lifecycle management.
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        NEW
        You will have proven sales background where you enjoy exceeding targets(minimum of12 months) and can evidence working to stretching sales targets (API written) as well as KPIs such as conversion rates (Calls, leads, quotes, sales, average premium) and quality measures (NTU rate, QA Score and Complaints)
        You will have proven sales background where you enjoy exceeding targets(minimum of12 months) and can evidence working to stretching sales targets (API written) as well as KPIs such as conversion rates (Calls, leads, quotes, sales, average premium) and quality measures (NTU rate, QA Score and Complaints)
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        NEWPREMIUM
        API Development and Management: Develop, deploy, and maintain custom APIs (REST, SOAP) to facilitate seamless data exchange and action execution between Agentforce and other systems. * 5+ years of hands-on experience in a technical integration role, such as an Integration Developer or API Specialist. * Expertise in API design and development (REST, SOAP, webhooks).
        API Development and Management: Develop, deploy, and maintain custom APIs (REST, SOAP) to facilitate seamless data exchange and action execution between Agentforce and other systems. * 5+ years of hands-on experience in a technical integration role, such as an Integration Developer or API Specialist. * Expertise in API design and development (REST, SOAP, webhooks).
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        NEW
        Recurring Payments Innovation: Build rock-solid API infrastructure and platform capabilities for pull payment functionality, tackling complex collection challenges head-on. * B2B Technical Product Expertise: You've got solid experience with API products, PaaS solutions, or technical SaaS platforms and love building merchant banking infrastructure for developers who integrate multiple financial endpoints and banking APIs.
        Recurring Payments Innovation: Build rock-solid API infrastructure and platform capabilities for pull payment functionality, tackling complex collection challenges head-on. * B2B Technical Product Expertise: You've got solid experience with API products, PaaS solutions, or technical SaaS platforms and love building merchant banking infrastructure for developers who integrate multiple financial endpoints and banking APIs.
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        NEW

        Senior .Net Developer

        Invitise Ltd
        M1, Manchester
        From £50,000 to £60,000 per annum + Excellent Benefits
        Were looking for a Senior .Net Developer for our professional services client based in Manchester on a permanent basis, paying between £50,000 to £60,000 per annum + great benefits. This role allows remote working with occasional site visits. Youll be working as part of a small, agile team, helping design and develop internal applications and new products using the latest .NET stack. This is a hands-on full-stack role, ideal for someone who enjoys solving business problems with clean, scalable code and mentoring junior team members. You will need to either hold a current UK Right to Work or have the ability to work without sponsorship. * C# and .NET (Core/Framework) * Angular (or modern JavaScript front-end frameworks) * SQL Server and Entity Framework * Docker & AWS ECS * Architecture & Design * Event-driven architecture (e.g. RabbitMQ) * RESTful APIs and microservic
        Were looking for a Senior .Net Developer for our professional services client based in Manchester on a permanent basis, paying between £50,000 to £60,000 per annum + great benefits. This role allows remote working with occasional site visits. Youll be working as part of a small, agile team, helping design and develop internal applications and new products using the latest .NET stack. This is a hands-on full-stack role, ideal for someone who enjoys solving business problems with clean, scalable code and mentoring junior team members. You will need to either hold a current UK Right to Work or have the ability to work without sponsorship. * C# and .NET (Core/Framework) * Angular (or modern JavaScript front-end frameworks) * SQL Server and Entity Framework * Docker & AWS ECS * Architecture & Design * Event-driven architecture (e.g. RabbitMQ) * RESTful APIs and microservic
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        NEW

        Senior .NET Developer (£70k + benefits)

        InterQuest Group (UK) Limited
        Manchester, Greater Manchester
        £60k - 70k per year + benefits
        Great opportunity for a Senior .NET Developer to join a SaaS scale-up in Manchester. Since their inception in 2015 this company has grown from start-up to scale-up, they now employ almost 200 people and have over 50,000 clients using their software across the globe. The technology department is made up of 5 product teams responsible for developing a suite of cloud based, web and mobile apps. Each team is cross-functional and works in a truly agile way, delivering small increments of value to their customers very frequently. This role sits within the team responsible for developing their flagship software platform and as a Senior .NET Developer you'll be given the opportunity to build, test and ship super-fast in a team that cares about engineering best practice, pairing and continuous improvement. * C#, .NET, REST APIs
        Great opportunity for a Senior .NET Developer to join a SaaS scale-up in Manchester. Since their inception in 2015 this company has grown from start-up to scale-up, they now employ almost 200 people and have over 50,000 clients using their software across the globe. The technology department is made up of 5 product teams responsible for developing a suite of cloud based, web and mobile apps. Each team is cross-functional and works in a truly agile way, delivering small increments of value to their customers very frequently. This role sits within the team responsible for developing their flagship software platform and as a Senior .NET Developer you'll be given the opportunity to build, test and ship super-fast in a team that cares about engineering best practice, pairing and continuous improvement. * C#, .NET, REST APIs
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        Senior .NET Developer

        Searchability (UK) Ltd
        M1, Manchester
        £60000 - £65000 per annum
        Senior Back-End Developer - C# / .NET / SQL Server * C#, .NET 6+, SQL Server, REST & GraphQL APIs, Azure, Git * Salary up to £65k * Onsite in Central Manchester * Excellent career progression - Who We Are - We're a collaborative tech team delivering robust, scalable SaaS products to a global customer base. Our developer-led culture values clean, maintainable code, innovation, and continuous learning. With an ambitious roadmap ahead, we're expanding our back-end capabilities and looking for a Senior Developer to help shape and deliver our next generation of features. Who We're Seeking - We're looking for a Senior Back-End Developer with deep expertise in C# (.NET 6+) and SQL Server, plus strong experience building and maintaining RESTful and GraphQL APIs. You'll work in a collaborative agile environment, contributing to the full development lifecycle from concept to de
        Senior Back-End Developer - C# / .NET / SQL Server * C#, .NET 6+, SQL Server, REST & GraphQL APIs, Azure, Git * Salary up to £65k * Onsite in Central Manchester * Excellent career progression - Who We Are - We're a collaborative tech team delivering robust, scalable SaaS products to a global customer base. Our developer-led culture values clean, maintainable code, innovation, and continuous learning. With an ambitious roadmap ahead, we're expanding our back-end capabilities and looking for a Senior Developer to help shape and deliver our next generation of features. Who We're Seeking - We're looking for a Senior Back-End Developer with deep expertise in C# (.NET 6+) and SQL Server, plus strong experience building and maintaining RESTful and GraphQL APIs. You'll work in a collaborative agile environment, contributing to the full development lifecycle from concept to de
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        FEATURED

        AWS Solutions Architect - AI Startup

        Oscar Associates (UK) Limited
        London
        £70000 - £75000 per annum + benefits
        Join a fast-moving AI startup as our AWS Solutions Architect, where you'll design cloud systems that power cutting-edge AI products. Not just another Architect - forward thinking, we want a creative builder who can scale, secure, and optimise our AWS environment like a pro. * Design and implement AWS architectures for AI workloads * Optimise for speed, scalability, and cost - thinking ahead * Advise on best practices for pipelines, data storage, and APIs * Work side by side with engineering team - devs, data, devops, and CTO to bring big ideas to life * AWS expert with a knack for creative solutions * Loves the startup hustle: agile, fast, hands-on * Infrastrcuture as Code, working in a Devops environment * Confident communicator who can make complex simple - If you want to build the cloud backbone of tomorrow's AI products, get in touch for more info. Keywords -
        Join a fast-moving AI startup as our AWS Solutions Architect, where you'll design cloud systems that power cutting-edge AI products. Not just another Architect - forward thinking, we want a creative builder who can scale, secure, and optimise our AWS environment like a pro. * Design and implement AWS architectures for AI workloads * Optimise for speed, scalability, and cost - thinking ahead * Advise on best practices for pipelines, data storage, and APIs * Work side by side with engineering team - devs, data, devops, and CTO to bring big ideas to life * AWS expert with a knack for creative solutions * Loves the startup hustle: agile, fast, hands-on * Infrastrcuture as Code, working in a Devops environment * Confident communicator who can make complex simple - If you want to build the cloud backbone of tomorrow's AI products, get in touch for more info. Keywords -
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        FEATURED
        Rate - £500 per day Inside IR35 - Duration - 1 month initial - Location - Remote with occasional visits into London - We are looking for an experienced Siebel Developer to join our client's technology team and play a pivotal role in the design, development and migration of Siebel CRM solutions. You will be responsible for enhancing existing systems, delivering robust integrations with external applications and supporting large-scale migration projects as part of digital transformation initiatives. * Design, configure and develop Siebel CRM applications to meet evolving business requirements. * Support migration projects, including data migration, environment upgrades and platform transitions. * Deliver robust integrations between Siebel and third-party systems using Siebel EAI, web services, APIs and middleware.
        Rate - £500 per day Inside IR35 - Duration - 1 month initial - Location - Remote with occasional visits into London - We are looking for an experienced Siebel Developer to join our client's technology team and play a pivotal role in the design, development and migration of Siebel CRM solutions. You will be responsible for enhancing existing systems, delivering robust integrations with external applications and supporting large-scale migration projects as part of digital transformation initiatives. * Design, configure and develop Siebel CRM applications to meet evolving business requirements. * Support migration projects, including data migration, environment upgrades and platform transitions. * Deliver robust integrations between Siebel and third-party systems using Siebel EAI, web services, APIs and middleware.
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        FEATURED
        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
        In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
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        NEW
        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
        Support an API-FIRST Analytics business strategy to design and build SaaS and PaaS solutions, including analytics data solutions, quantitative models, risk analytics and customized reporting tools, and other sophisticated analytical tools. * Experience leading/designing/delivering API service-based product solutions
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        Join Us as a Software Development Engineer in Test (SDET)! Overview - We are looking for a Software Development Engineer in Test (SDET) or automation tester who comes from a Java Software Development background. The role is to assist in the development of the new Index platform for the FTSE-Russell Index business of the London Stock Exchange Group (LSEG). The Index Platform team performs the calculation, maintenance and distribution of Index products. You will be working on innovative technologies with a team of engineers to implement solutions which support the strategic growth of the Index business. You will be involved in the development of complex test tools and solutions as well as new test frameworks, starting from a blank slate in some cases, to help ensure the quality of a greenfield application build.
        Join Us as a Software Development Engineer in Test (SDET)! Overview - We are looking for a Software Development Engineer in Test (SDET) or automation tester who comes from a Java Software Development background. The role is to assist in the development of the new Index platform for the FTSE-Russell Index business of the London Stock Exchange Group (LSEG). The Index Platform team performs the calculation, maintenance and distribution of Index products. You will be working on innovative technologies with a team of engineers to implement solutions which support the strategic growth of the Index business. You will be involved in the development of complex test tools and solutions as well as new test frameworks, starting from a blank slate in some cases, to help ensure the quality of a greenfield application build.
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        Hawkrose is delighted to announce we are hiring for the role of Senior Software Developer. In this role, the successful candidate will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals. The successful candidate will be given the autonomy to set their own direction of work, and will work closely with the Head of Development to establish best practice across the Hawkrose development function. The role requires a mixture of home and office working with the expectation that the successful candidate will manage their own time and location to best deliver for our customers. Required Skills - The successful candidate will be a full stack software engineer with experience of enterprise grade software development and an agile development environment.
        Hawkrose is delighted to announce we are hiring for the role of Senior Software Developer. In this role, the successful candidate will be responsible for the delivery of exciting projects and products across our Civil Aviation, Defence and Public Sector industry verticals. The successful candidate will be given the autonomy to set their own direction of work, and will work closely with the Head of Development to establish best practice across the Hawkrose development function. The role requires a mixture of home and office working with the expectation that the successful candidate will manage their own time and location to best deliver for our customers. Required Skills - The successful candidate will be a full stack software engineer with experience of enterprise grade software development and an agile development environment.
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        NEW

        Senior Python Developer

        Hays
        London
        £600.0 - £700.0 per day + Up to £700pd Umbrella
        I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do now - If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
        I am currently working with a London-based Tier 1 investment bank who are actively seeking a Python Developer on a long-term contract basis. What you'll need to succeed * Strong Python programming experience within Financial Services - Mandatory * Good understanding of quantitative finance * Good experience developing and optimising Python-based calculators and models. * Strong experience developing high-performance APIs using Flask or FastAPI. * Expertise in Pandas, NumPy and other computing libraries. * Strong experience liaising with front-office stakeholders - What you'll get in return * Initial 6-month contract with extensions * Up to £700pd umbrella * London-based hybrid working - What you need to do now - If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now.
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        NEW
        Role: Full Stack Software Engineer (UK-based, early-stage startup) £60,000 - £80,000 per annum | No Sponsorship | x3 week in office - Backed by technology start up accelerator and VC - Join a mission-driven AI startup transforming how medical and healthcare organisations collaborate. Using machine learning and advanced recommendation systems, the team helps to matchmake some of the leading Medical and Pharmaceuticalbusinesses with their extensive network of professionals. This allows them to engage seamlessly all while reducing operational costs so resources can focus on changing lives. This is the chance to work on cutting-edge AI technology at an early stage with real influence on product and architecture to help medical organisations do more with their resources while changing lives and impact clients across the US and FTSE markets.
        Role: Full Stack Software Engineer (UK-based, early-stage startup) £60,000 - £80,000 per annum | No Sponsorship | x3 week in office - Backed by technology start up accelerator and VC - Join a mission-driven AI startup transforming how medical and healthcare organisations collaborate. Using machine learning and advanced recommendation systems, the team helps to matchmake some of the leading Medical and Pharmaceuticalbusinesses with their extensive network of professionals. This allows them to engage seamlessly all while reducing operational costs so resources can focus on changing lives. This is the chance to work on cutting-edge AI technology at an early stage with real influence on product and architecture to help medical organisations do more with their resources while changing lives and impact clients across the US and FTSE markets.
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        NEWFEATURED
        Were looking for a Senior Java Developer for our public sector client based in Leeds on an initial 12-month contract paying up to £700 per day Inside IR35. This role allows hybrid working with an expectation to attend the office 3 days per week. You will need to either hold current BPSS clearance or have the ability to pass it, and be eligible for SC clearance. The successful Senior Java Developer will possess proven skills working with the following * Java 21 (or later) * Test Driven Development (TDD) and Behaviour Driven Development (BDD) * Large microservice architectures * Agile environments and pair programming * Implementing APIs for internal and external use * Building automated test suites in CI/CD environments * Unix/Linux operating systems * Communicating technical concepts to non-technical audiences * Jackson, JAX-RS, Mockito * ActiveMQ or Kafka
        Were looking for a Senior Java Developer for our public sector client based in Leeds on an initial 12-month contract paying up to £700 per day Inside IR35. This role allows hybrid working with an expectation to attend the office 3 days per week. You will need to either hold current BPSS clearance or have the ability to pass it, and be eligible for SC clearance. The successful Senior Java Developer will possess proven skills working with the following * Java 21 (or later) * Test Driven Development (TDD) and Behaviour Driven Development (BDD) * Large microservice architectures * Agile environments and pair programming * Implementing APIs for internal and external use * Building automated test suites in CI/CD environments * Unix/Linux operating systems * Communicating technical concepts to non-technical audiences * Jackson, JAX-RS, Mockito * ActiveMQ or Kafka
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        NEW

        JavaScript Developer | AI - Hybrid Remote

        VERTECH GROUP (UK) LTD
        N7, North London
        From £80,000 to £90,000 per annum + Benefits
        JavaScript Developer - Location: 3-4 days per wk from home / 1-2 days in London - Salary: Circa 80k 90k + Benefits - JavaScript Developer required byrequired by fast-growing, revolutionary tech company! This is a varied, challenging role in a talented team where youll be responsible for developing scalable backend services that bring their AI vision to life. You dont need to be a machine learning researcher but you do need to know how to integrate modern AI capabilities into productions * At least 4 years backend development experience * Solid expertise in Node.js * Experience integrating LLM APIs and open-source models into production systems * Hands-on work implementing Retrieval-Augmented Generation (RAG) pipelines * Experience designing and optimizing agentic AI workflows - Tremendous opportunity offering plenty of scope for career progression in a friendly, innov
        JavaScript Developer - Location: 3-4 days per wk from home / 1-2 days in London - Salary: Circa 80k 90k + Benefits - JavaScript Developer required byrequired by fast-growing, revolutionary tech company! This is a varied, challenging role in a talented team where youll be responsible for developing scalable backend services that bring their AI vision to life. You dont need to be a machine learning researcher but you do need to know how to integrate modern AI capabilities into productions * At least 4 years backend development experience * Solid expertise in Node.js * Experience integrating LLM APIs and open-source models into production systems * Hands-on work implementing Retrieval-Augmented Generation (RAG) pipelines * Experience designing and optimizing agentic AI workflows - Tremendous opportunity offering plenty of scope for career progression in a friendly, innov
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        What is the average salary for API in Europe?

        Average salary per year
        £57,499

        The average salary for a API in Europe is £57,499. API in Europe salaries range from £47,499 to £77,499.

        Frequently Asked Questions

        How many contract API jobs are there in Europe?
        There are 1,155 contract API jobs within 20 miles of Europe available on CWJobs right now.

        What other similar jobs are there to contract API jobs in Europe?
        As well as contract API jobs in Europe, you can find contract IT, Software Development, Architecture, amongst many others.