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        19 API jobs in London + 20 miles

        Associate Director, Engineering (Education)

        IRIS Recruitment
        Slough (SL3)
        Competitive plus bonus and benefits
        Ensure scalable, API-first, cloud-native platform design * Strong understanding of DevOps, SRE, API architecture and AI integration
        Ensure scalable, API-first, cloud-native platform design * Strong understanding of DevOps, SRE, API architecture and AI integration
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        FEATURED
        Power System & Product Development Engineer - London - Hybrid Salary: £80,574 + 3% bonus - We are seeking a Power System & Product Development Engineer to support the development of a smarter, more flexible electricity network. This role combines power systems engineering with digital product development, focusing on building tools that support flexible connections, DER integration, and DERMS operations across the network. Responsibilities * Lead development of smart grid digital tools supporting flexible connections and DERMS. * Perform power system studies (thermal, voltage, fault level) to identify network constraints. * Develop Python-based tools, data pipelines, dashboards, and APIs. * Use GitHub for version control and collaborative development. * Work with teams across DSO, Planning, Operations, and IT, as well as external partners.
        Power System & Product Development Engineer - London - Hybrid Salary: £80,574 + 3% bonus - We are seeking a Power System & Product Development Engineer to support the development of a smarter, more flexible electricity network. This role combines power systems engineering with digital product development, focusing on building tools that support flexible connections, DER integration, and DERMS operations across the network. Responsibilities * Lead development of smart grid digital tools supporting flexible connections and DERMS. * Perform power system studies (thermal, voltage, fault level) to identify network constraints. * Develop Python-based tools, data pipelines, dashboards, and APIs. * Use GitHub for version control and collaborative development. * Work with teams across DSO, Planning, Operations, and IT, as well as external partners.
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        Senior Solutions Engineer

        SCALERS GROUP LIMITED
        The City, City of London (EC2), EC3V
        From £80,000 to £90,000 per annum
        UK, Remote - Scalers HQ is proud to be partnering with an innovative SaaS FinTech & Payments business in the UK. The SaaS platform our client has built takes away a lot of pain points of payment fragmentation. Were looking for a Senior Solution Engineer, ideally with SaaS or Payments background to contribute towards ambitious growth plans across EMEA. This is an exciting time to join our FinTech partner, and youll join a scaling a team that are rapidly growing. Responsibilities * Communicate with C-suite and senior leaders across commercial and tech to support them in building incredible experiences for their customers * Writing integration plans and sample code for sellers to assist them in implementing their own personalised integration * Lead technical discovery and solution design for global enterprises with complex requirements. * Mentor new & junior members
        UK, Remote - Scalers HQ is proud to be partnering with an innovative SaaS FinTech & Payments business in the UK. The SaaS platform our client has built takes away a lot of pain points of payment fragmentation. Were looking for a Senior Solution Engineer, ideally with SaaS or Payments background to contribute towards ambitious growth plans across EMEA. This is an exciting time to join our FinTech partner, and youll join a scaling a team that are rapidly growing. Responsibilities * Communicate with C-suite and senior leaders across commercial and tech to support them in building incredible experiences for their customers * Writing integration plans and sample code for sellers to assist them in implementing their own personalised integration * Lead technical discovery and solution design for global enterprises with complex requirements. * Mentor new & junior members
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        Our client is seeking a contract Threat Detection Engineer to support the ongoing delivery of detection engineering activities within a busy SOC environment. This role is centred on hands-on engineering and execution, ensuring detection content, automations, and integrations are delivered effectively and aligned to operational priorities. Working closely with threat hunting and SOC teams, you will translate detection requirements into practical outcomes, contributing directly to sprint-based delivery and continuous service improvement. This is a highly technical role suited to someone who enjoys building, tuning, and optimising detection capabilities across modern security platforms. Key Responsibilities * Develop and deliver detection content in line with sprint priorities and operational requirements
        Our client is seeking a contract Threat Detection Engineer to support the ongoing delivery of detection engineering activities within a busy SOC environment. This role is centred on hands-on engineering and execution, ensuring detection content, automations, and integrations are delivered effectively and aligned to operational priorities. Working closely with threat hunting and SOC teams, you will translate detection requirements into practical outcomes, contributing directly to sprint-based delivery and continuous service improvement. This is a highly technical role suited to someone who enjoys building, tuning, and optimising detection capabilities across modern security platforms. Key Responsibilities * Develop and deliver detection content in line with sprint priorities and operational requirements
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        Principle Java Engineer

        Profile 29
        South East London (SE1)
        From £65,000 to £75,000 per annum + benefits + hybrid home 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 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
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        Principle Java Engineer

        Profile 29
        South East London (SE1)
        From £65,000 to £75,000 per annum + benefits + hybrid home 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 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 £65,000 to £75,000 per annum + benefits + hybrid home 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 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
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        With over 300 million downloads and processing 5+ billion images annually, we serve both individual creators and major enterprises like Amazon, DoorDash, and Decathlon through our B2C app and B2B API solutions. * Role: Senior API Engineer (Fast API/Python) Our Image Editing API enables anyone to easily create high-quality images with a variety of AI-powered features including background removal, AI shadows, AI backgrounds * You will collaborate with your team to prioritize and implement the most impactful features for the API. * You will get fast feedback from API users and will iterate quickly (we update the API several times a week). You will follow the usage of the API and make decisions based on that. * The API is growing fast and sits at the intersection of developer experience and state-of-the-art AI image models.
        With over 300 million downloads and processing 5+ billion images annually, we serve both individual creators and major enterprises like Amazon, DoorDash, and Decathlon through our B2C app and B2B API solutions. * Role: Senior API Engineer (Fast API/Python) Our Image Editing API enables anyone to easily create high-quality images with a variety of AI-powered features including background removal, AI shadows, AI backgrounds * You will collaborate with your team to prioritize and implement the most impactful features for the API. * You will get fast feedback from API users and will iterate quickly (we update the API several times a week). You will follow the usage of the API and make decisions based on that. * The API is growing fast and sits at the intersection of developer experience and state-of-the-art AI image models.
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        Design and build Automation from scratch, Web Services/API , Performance & Accessibility test frameworks with DevOps CI/CD * API testing with Rest Assured or Postman
        Design and build Automation from scratch, Web Services/API , Performance & Accessibility test frameworks with DevOps CI/CD * API testing with Rest Assured or Postman
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        Big banks and enterprises use our API, which means our search and validation engines need to be lightning-fast and bulletproof, even when our biggest partners turn on the tap.
        Big banks and enterprises use our API, which means our search and validation engines need to be lightning-fast and bulletproof, even when our biggest partners turn on the tap.
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        Full-Stack Delivery: Deploy production-grade features across the platform, including real-time monitoring dashboards, policy enforcement engines, API integrations, and the agent orchestration layers. * Take-Home or Pair Session (23 hours): A practical exercise involving the construction of a small agentic workflow using Claudes API.
        Full-Stack Delivery: Deploy production-grade features across the platform, including real-time monitoring dashboards, policy enforcement engines, API integrations, and the agent orchestration layers. * Take-Home or Pair Session (23 hours): A practical exercise involving the construction of a small agentic workflow using Claudes API.
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        Synthesia is the worlds leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US. As AI continues to shape the way we live and work, Synthesia develops products to enhance visual communication and enterprise skill development, helping people work better and stay at the center of successful organizations. Following our recent Series E funding round, where we raised $200 million, our valuation stands at $4 billion. Our total funding exceeds $530 million from premier investors including Accel, NVentures (Nvidia's VC arm), Kleiner Perkins, GV, and Evantic Capital, alongside the founders and operators of Stripe, Datadog, Miro, and Webflow. About the role - Lead the delivery of complex engineering projects in AI-powered video, avatar rendering, and ...
        Synthesia is the worlds leading AI video platform for business, used by over 90% of the Fortune 100. Founded in 2017, the company is headquartered in London, with offices and teams across Europe and the US. As AI continues to shape the way we live and work, Synthesia develops products to enhance visual communication and enterprise skill development, helping people work better and stay at the center of successful organizations. Following our recent Series E funding round, where we raised $200 million, our valuation stands at $4 billion. Our total funding exceeds $530 million from premier investors including Accel, NVentures (Nvidia's VC arm), Kleiner Perkins, GV, and Evantic Capital, alongside the founders and operators of Stripe, Datadog, Miro, and Webflow. About the role - Lead the delivery of complex engineering projects in AI-powered video, avatar rendering, and ...
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        About Sano - Mission; what we do * accelerating the worlds transition to personalised medicine - Purpose; why we do it * to speed up development of life-saving treatments for those with limited options - Vision; where were going * become the worlds best source of patient-in-the-loop genomic and health data for precision medicine development - Curious to dive deeper? Read more about what we do here - Brief into to the role, who they are reporting to,... * Role - Product Engineer * Salary - 80,000 - 90,000 * Location - UK (remote only) * Identifying and prioritising the right problems to solve , focusing on meaningful customer outcomes and making smart trade-offs to maximise impact with limited time and resources. * Owning features end-to-end , from early discovery and technical input through design, implementation, testing, and release.
        About Sano - Mission; what we do * accelerating the worlds transition to personalised medicine - Purpose; why we do it * to speed up development of life-saving treatments for those with limited options - Vision; where were going * become the worlds best source of patient-in-the-loop genomic and health data for precision medicine development - Curious to dive deeper? Read more about what we do here - Brief into to the role, who they are reporting to,... * Role - Product Engineer * Salary - 80,000 - 90,000 * Location - UK (remote only) * Identifying and prioritising the right problems to solve , focusing on meaningful customer outcomes and making smart trade-offs to maximise impact with limited time and resources. * Owning features end-to-end , from early discovery and technical input through design, implementation, testing, and release.
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        Job Title: Senior Engineer I - Location: London, Bristol or Edinburgh (Including Hybrid) Salary: £60,000 - £82,500 - Team: Developer Experience - Reporting To: Head of Engineering - Closing date: Friday 30th March 2026 - This role is based in the UK and requires an existing right to work in the UK. At this time, we are not able to offer visa sponsorship for this role. We are committed to building a diverse, global team and our sponsorship policy is evaluated on a role-by-role basis. We encourage you to keep an eye on our careers site to stay informed about future opportunities where we are able to offer visa sponsorship. Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination. We help energy companies overcome today's challenges while accelerating the shift to a clean, electrified future.
        Job Title: Senior Engineer I - Location: London, Bristol or Edinburgh (Including Hybrid) Salary: £60,000 - £82,500 - Team: Developer Experience - Reporting To: Head of Engineering - Closing date: Friday 30th March 2026 - This role is based in the UK and requires an existing right to work in the UK. At this time, we are not able to offer visa sponsorship for this role. We are committed to building a diverse, global team and our sponsorship policy is evaluated on a role-by-role basis. We encourage you to keep an eye on our careers site to stay informed about future opportunities where we are able to offer visa sponsorship. Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination. We help energy companies overcome today's challenges while accelerating the shift to a clean, electrified future.
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        About Sano - Mission: what we do * Accelerating the worlds transition to personalised medicine - Purpose: why we do it * To speed up development of life-saving treatments for those with limited options - Vision: where were going * Become the worlds best source of patient-in-the-loop genomic and health data for precision medicine development - Curious to dive deeper? Read more about what we do here - Brief into to the role, who they are reporting to,... * Role - VP Data & Engineering * Salary -£120,000 to £150,000 depending on experience * Location - UK (remote only) As VP of Engineering & Data, youll be a hands-on, strategic leader for a small high-impact team. Youll own the technical direction and delivery for our engineering function, including front-end, backend, and platform disciplines. You will be instrumental in ensuring we can reliably ingest, curate, and serve high-quality ...
        About Sano - Mission: what we do * Accelerating the worlds transition to personalised medicine - Purpose: why we do it * To speed up development of life-saving treatments for those with limited options - Vision: where were going * Become the worlds best source of patient-in-the-loop genomic and health data for precision medicine development - Curious to dive deeper? Read more about what we do here - Brief into to the role, who they are reporting to,... * Role - VP Data & Engineering * Salary -£120,000 to £150,000 depending on experience * Location - UK (remote only) As VP of Engineering & Data, youll be a hands-on, strategic leader for a small high-impact team. Youll own the technical direction and delivery for our engineering function, including front-end, backend, and platform disciplines. You will be instrumental in ensuring we can reliably ingest, curate, and serve high-quality ...
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        7 exact matches jobs are outside your preferred location

        Principal Engineer

        Kraft Recruitment
        Wick End, Bedford (MK43), MK43
        £80,000 per annum
        Well versed in industry standards such as ISO, API and HI with hands-on experience in design validation and product testing.
        Well versed in industry standards such as ISO, API and HI with hands-on experience in design validation and product testing.
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        Founding Engineer

        Hyperloop Recruitment
        Milton Keynes (MK10)
        Equity & Bonus
        £100k - Equity | Remote Flexibility - Typescript | Azure | Python | LLM | Terraform - The Company - We’re working with an early-stage technology company bringing digital transformation to traditionally manual supply chain and product data processes. They are looking for an experienced engineer who can balance hands-on engineering with technical strategy as the business moves through its next phase of growth. This role suits someone who enjoys operating in a small but growing team, is motivated by building solutions, solving complex problems, and is comfortable rolling up their sleeves to deliver. The environment is fast-paced, where priorities can evolve quickly and ambiguity is often part of the journey. The successful candidate will be excited by the autonomy of an early-stage environment and the opportunity to shape the technical direction of a high-potential B2B SaaS platform.
        £100k - Equity | Remote Flexibility - Typescript | Azure | Python | LLM | Terraform - The Company - We’re working with an early-stage technology company bringing digital transformation to traditionally manual supply chain and product data processes. They are looking for an experienced engineer who can balance hands-on engineering with technical strategy as the business moves through its next phase of growth. This role suits someone who enjoys operating in a small but growing team, is motivated by building solutions, solving complex problems, and is comfortable rolling up their sleeves to deliver. The environment is fast-paced, where priorities can evolve quickly and ambiguity is often part of the journey. The successful candidate will be excited by the autonomy of an early-stage environment and the opportunity to shape the technical direction of a high-potential B2B SaaS platform.
        more
        Full Stack Engineer - Outisde IR35 up to £525 - Intial 4 month contract, high chance of extension - I am recruiting for multiple Full Stack Engineers to help our client build scalable, high-performance applications and contribute across both backend and frontend systems. This role involves working on modern production systems, building APIs and services, and collaborating with cross-functional teams to deliver reliable and user-focused products. Key Responsibilities * Build prototypes and evolve them into scalable, production-ready applications * Develop and maintain backend services and APIs in Node/Python * Contribute to frontend development, building responsive and intuitive user interfaces in React * Design and implement data workflows and system integrations * Work with cloud infrastructure and distributed systems
        Full Stack Engineer - Outisde IR35 up to £525 - Intial 4 month contract, high chance of extension - I am recruiting for multiple Full Stack Engineers to help our client build scalable, high-performance applications and contribute across both backend and frontend systems. This role involves working on modern production systems, building APIs and services, and collaborating with cross-functional teams to deliver reliable and user-focused products. Key Responsibilities * Build prototypes and evolve them into scalable, production-ready applications * Develop and maintain backend services and APIs in Node/Python * Contribute to frontend development, building responsive and intuitive user interfaces in React * Design and implement data workflows and system integrations * Work with cloud infrastructure and distributed systems
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        Own end-to-end GraphQL API delivery: schema design through to production integration, focusing on performance, maintainability, security, and scalability. * Strong commercial experience delivering Federated GraphQL in production (schema-first design, supergraph/subgraph architecture, resolvers, schema governance, and API evolution). * Testing experience with modern frameworks such as Vitest and Playwright (API + end-to-end).
        Own end-to-end GraphQL API delivery: schema design through to production integration, focusing on performance, maintainability, security, and scalability. * Strong commercial experience delivering Federated GraphQL in production (schema-first design, supergraph/subgraph architecture, resolvers, schema governance, and API evolution). * Testing experience with modern frameworks such as Vitest and Playwright (API + end-to-end).
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        IAM Senior Engineer

        BRITISH UNITED PROVIDENT ASSOCIATION LIMITED(THE)
        South East
        78200
        Staines - Full time - 2026-03-16 - Posted Today - R1216187 - London or Staines - Permanent - From: £78.2k DOE + 10% bonus + fantastic benefits - Full time: 37.5 hours per week, including weekend/ out of hours rota** We consider all types of flexibility, including locations, hours and working patterns. At Bupa, we're passionate about technology. With colleagues, customers, patients and residents in mind you'll have the opportunity to work on innovative projects and make a real impact on their lives. Right from the start you'll become part of our digital strategy, joining us on our journey and developing yourself along the way. As Identity and Access Management (IAM) Senior Engineer you will be working across Bupa Global, India and UK Market Unit. You will be responsible for the end-to-end of IAM design, development, testing, implementation, integration and maintenance of IAM systems and solutions ...
        Staines - Full time - 2026-03-16 - Posted Today - R1216187 - London or Staines - Permanent - From: £78.2k DOE + 10% bonus + fantastic benefits - Full time: 37.5 hours per week, including weekend/ out of hours rota** We consider all types of flexibility, including locations, hours and working patterns. At Bupa, we're passionate about technology. With colleagues, customers, patients and residents in mind you'll have the opportunity to work on innovative projects and make a real impact on their lives. Right from the start you'll become part of our digital strategy, joining us on our journey and developing yourself along the way. As Identity and Access Management (IAM) Senior Engineer you will be working across Bupa Global, India and UK Market Unit. You will be responsible for the end-to-end of IAM design, development, testing, implementation, integration and maintenance of IAM systems and solutions ...
        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 API jobs are there in London?
        There are 19 API jobs within 20 miles of London available on JustEngineers right now.

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