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        258 Permanent API jobs in London + 20 miles

        Technical Product Manager API SaaS

        Client Server
        Shoreditch, East London (E1), EC2A
        £95000 - £130000 per annum + benefits
        You'll be embedded within delivery teams, UX and engineering and utilise your knowledge of software development to make trade-offs, steward the delivery process and close the gaps in requirements including producing technical documentation along with wireframes and API scaffolding where appropriate. Apply now to find out more about this Technical Product Manager (API SaaS) opportunity.
        You'll be embedded within delivery teams, UX and engineering and utilise your knowledge of software development to make trade-offs, steward the delivery process and close the gaps in requirements including producing technical documentation along with wireframes and API scaffolding where appropriate. Apply now to find out more about this Technical Product Manager (API SaaS) opportunity.
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        PREMIUM

        Java Engineer

        Profile 29
        South East London (SE1)
        From £40,000 to £90,000 per annum (DoE) + hybrid or remote working
        Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid junior jnr
        Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid junior jnr
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        Principle Java Engineer

        Profile 29
        South East London (SE1)
        From £70,000 to £90,000 per annum + benefits + hybrid (or remote) work
        Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid lead senior manager manage
        Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid lead senior manager manage
        more

        Principle Java Engineer

        Profile 29
        South East London (SE1)
        From £70,000 to £90,000 per annum + benefits + hybrid (or remote) work
        Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid lead senior manager manage
        Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid lead senior manager manage
        more

        C# / .NET SENIOR SOFTWARE ENGINEER (AWS)

        Secure Recruitment Ltd
        East London (E1)
        Up to £90,000 per annum + Benefits (Hybrid Working)
        System & API Design: Strong Database Architecture Skills & Experience Designing Patterns that make Integrations Fast, Reliable & Elegant. Searches: Software Engineer / AWS / Backend Engineer /Integration Systems Architect /Data Pipeline Engineer /Senior AWS Cloud Engineer /Backend Technical Lead / Engineering Lead /Senior Software Engineer /Senior Backend Engineer /Principal Platform Engineer /Lead C# Developer / AI / API Design / API / LLMs / Artificial Intelligence
        System & API Design: Strong Database Architecture Skills & Experience Designing Patterns that make Integrations Fast, Reliable & Elegant. Searches: Software Engineer / AWS / Backend Engineer /Integration Systems Architect /Data Pipeline Engineer /Senior AWS Cloud Engineer /Backend Technical Lead / Engineering Lead /Senior Software Engineer /Senior Backend Engineer /Principal Platform Engineer /Lead C# Developer / AI / API Design / API / LLMs / Artificial Intelligence
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        Software Engineer | London Hybrid | Scientific Software | Python, APIs, AWS, Data Integrations | £55k-£65k + Equity - A growing software company is helping scientists and researchers accelerate the development of next-generation products across industries including advanced materials, chemicals, biotechnology, food, and sustainability. Backed by leading investors and trusted by enterprise R&D organisations, their platform is transforming how scientific teams manage data, experiments, and research workflows. They are looking for a Software Engineer / Implementations Engineer to join a highly technical customer-facing engineering team. This role sits between software engineering, data engineering, and customer delivery, helping build integrations, data migrations, APIs, and custom workflows that connect customer environments directly into the platform.
        Software Engineer | London Hybrid | Scientific Software | Python, APIs, AWS, Data Integrations | £55k-£65k + Equity - A growing software company is helping scientists and researchers accelerate the development of next-generation products across industries including advanced materials, chemicals, biotechnology, food, and sustainability. Backed by leading investors and trusted by enterprise R&D organisations, their platform is transforming how scientific teams manage data, experiments, and research workflows. They are looking for a Software Engineer / Implementations Engineer to join a highly technical customer-facing engineering team. This role sits between software engineering, data engineering, and customer delivery, helping build integrations, data migrations, APIs, and custom workflows that connect customer environments directly into the platform.
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        Senior Product Engineer, Full Stack - Energy

        MFK Recruitment Ltd
        Piccadilly, Central London (W1), W1S 4NS
        From £70,000 to £95,000 per annum
        £70,000 to £95,000 - Permanent - London, hybrid - The opportunity - Our client is hiring a Senior Product Engineer, Full Stack, to help build the next generation of customer-facing software in the energy market. Operating in a complex, high-value sector, the business is combining technology, data, and product thinking to modernise an area of the energy industry that has historically been underserved by great software. We have already placed 3 people into the business and are pleased to be supporting them again on this important hire. This is a genuinely exciting opportunity for a frontend-strong engineer who wants real ownership, autonomy, and the chance to build products from scratch. They are looking for someone with strong React and TypeScript capability, alongside solid backend exposure across Python, APIs, and databases.
        £70,000 to £95,000 - Permanent - London, hybrid - The opportunity - Our client is hiring a Senior Product Engineer, Full Stack, to help build the next generation of customer-facing software in the energy market. Operating in a complex, high-value sector, the business is combining technology, data, and product thinking to modernise an area of the energy industry that has historically been underserved by great software. We have already placed 3 people into the business and are pleased to be supporting them again on this important hire. This is a genuinely exciting opportunity for a frontend-strong engineer who wants real ownership, autonomy, and the chance to build products from scratch. They are looking for someone with strong React and TypeScript capability, alongside solid backend exposure across Python, APIs, and databases.
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        Full Stack Engineer / Technical Lead

        Client Server
        Canary Wharf, East London (E14), E14
        £85000 - £110000 per annum + bonus + benefits
        Do you enjoy working with a range of programming languages and agentic AI? You could be progressing your career as a Full Stack Engineer / Technical Lead at a massively profitable Private Equity firm that invest in businesses across the finance, investment management and insurance space. As a Full Stack Engineer / Technical Lead you will work at the intersection of technology, data, strategy and investment, playing a pivotal role in identifying opportunities to unlock growth, improve operational performance and accelerate digital transformation across a diverse range of businesses. You'll collaborate directly with investors, executive leadership teams and portfolio companies, leading data diligence on prospective investments and shaping the technology and data strategies that underpin post-acquisition value creation.
        Do you enjoy working with a range of programming languages and agentic AI? You could be progressing your career as a Full Stack Engineer / Technical Lead at a massively profitable Private Equity firm that invest in businesses across the finance, investment management and insurance space. As a Full Stack Engineer / Technical Lead you will work at the intersection of technology, data, strategy and investment, playing a pivotal role in identifying opportunities to unlock growth, improve operational performance and accelerate digital transformation across a diverse range of businesses. You'll collaborate directly with investors, executive leadership teams and portfolio companies, leading data diligence on prospective investments and shaping the technology and data strategies that underpin post-acquisition value creation.
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        PREMIUM

        Solutions Architect

        Solus Accident Repair Centres
        North London, London
        GBP £50,000.00/Yr. - GBP £65,000.00/Yr.
        Deep knowledge of modern enterprise patterns, SaaS adoption, API and event based integrations and resilience approaches.
        Deep knowledge of modern enterprise patterns, SaaS adoption, API and event based integrations and resilience approaches.
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        Exposure to one or more of the following: tokenized funds and digital-native assets; MPC/HSM controls; atomic DvP; interoperability between legacy and tokenized flows; digital cash/settlement (e.g., deposit tokens, stablecoins, CBDCs); secure API integrations; KYC/KYB and transaction monitoring for digital assets; tokenized collateral workflows; digital ETFs/ETPs; tokenized money market funds and digital share classes.
        Exposure to one or more of the following: tokenized funds and digital-native assets; MPC/HSM controls; atomic DvP; interoperability between legacy and tokenized flows; digital cash/settlement (e.g., deposit tokens, stablecoins, CBDCs); secure API integrations; KYC/KYB and transaction monitoring for digital assets; tokenized collateral workflows; digital ETFs/ETPs; tokenized money market funds and digital share classes.
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        QA Engineer

        Technically Gifted Ltd
        City of London (EC1V)
        £55,000 per annum
        Test newly developed features and perform regression testing of our casino products, including API as well as sportsbook and CMS-related functionality Improve/refactor the testing automation framework - Perform API testing using Java/RestAssured - Hands on experience of API testing
        Test newly developed features and perform regression testing of our casino products, including API as well as sportsbook and CMS-related functionality Improve/refactor the testing automation framework - Perform API testing using Java/RestAssured - Hands on experience of API testing
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        Lead Technical Architect

        TPXImpact Holdings Plc
        East London (E1)
        From £53,600 to £79,200 per annum
        AboutTheRole - WerelookingformultipleLeadTechnicalArchitectswhowillplayacentralroleinthesuccessfuldeliveryoftechnologyprojects. Youwillworkcloselywithclientsandinternalteamstounderstandcontext,co-designsolutions,andleadtechnicalteamsthroughproductdevelopment. Inthisrole,youwillleadarchitectureworkonclientprogrammes. Youwilldesignandoverseeend-to-endtechnologysolutionsthatarescalable,secure,user-centred,andethicallyresponsible. Thisroleinvolvestranslatingbusinessneedsintotechnologysolutions,creatingarchitectureartefacts,andsupportingclientstomakesustainableanduser-focusedtechnologychoices. Youmightbeaspecialistinaparticulartechnologydomainorplatform-suchaslegacysystemmigration,m365,Azure,GCP,AWS,dataplatformsorintelligentprocessautomation-butyouwillapplyatechnologyagnosticperspective. You'lloperateasatrustedadvisor,oftenleadingsmallerengagementsorplayingaseniorroleonlargerones,butmayalsoworksoloorcontributeasamemberofateamasneeded.
        AboutTheRole - WerelookingformultipleLeadTechnicalArchitectswhowillplayacentralroleinthesuccessfuldeliveryoftechnologyprojects. Youwillworkcloselywithclientsandinternalteamstounderstandcontext,co-designsolutions,andleadtechnicalteamsthroughproductdevelopment. Inthisrole,youwillleadarchitectureworkonclientprogrammes. Youwilldesignandoverseeend-to-endtechnologysolutionsthatarescalable,secure,user-centred,andethicallyresponsible. Thisroleinvolvestranslatingbusinessneedsintotechnologysolutions,creatingarchitectureartefacts,andsupportingclientstomakesustainableanduser-focusedtechnologychoices. Youmightbeaspecialistinaparticulartechnologydomainorplatform-suchaslegacysystemmigration,m365,Azure,GCP,AWS,dataplatformsorintelligentprocessautomation-butyouwillapplyatechnologyagnosticperspective. You'lloperateasatrustedadvisor,oftenleadingsmallerengagementsorplayingaseniorroleonlargerones,butmayalsoworksoloorcontributeasamemberofateamasneeded.
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        NEWPREMIUM

        Automation Test Engineer

        Data Careers
        Southwark, South East London (SE1), SE1
        £60000 - £80000 per annum
        Skills: Integration Testing, API Testing, SQL, BDD (Gherkin / SpecFlow), Test Automation * Support API and integration testing across distributed systems * API testing expertise
        Skills: Integration Testing, API Testing, SQL, BDD (Gherkin / SpecFlow), Test Automation * Support API and integration testing across distributed systems * API testing expertise
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        AI Integration Engineer

        DTG Global Ltd
        City of London (EC1)
        Up to £90,000 per annum
        Youll develop robust backend services and API orchestration to underpin production-grade AI applications, and ensure operational excellence through monitoring, error handling, performance optimisation and Azure-based deployments.
        Youll develop robust backend services and API orchestration to underpin production-grade AI applications, and ensure operational excellence through monitoring, error handling, performance optimisation and Azure-based deployments.
        more

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        What is the average salary for API in London?

        Average salary per year
        £72,499

        The average salary for a API in London is £72,499. API in London salaries range from £62,499 to £87,499.

        Frequently Asked Questions

        How many permanent API jobs are there in London?
        There are 258 permanent API jobs within 20 miles of London available on CWJobs right now.

        Where in London are these permanent jobs?
        You can find permanent jobs in City of London, Central London, West End.

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