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        15 API jobs in London + 20 miles

        Lead Applied AI Engineer

        SUMMER-BROWNING ASSOCIATES LIMITED
        E1, East London
        £700 - £750 per day
        Familiarity with tools for working with Large Language Models via API or in a local context (e.g. HuggingFace transformers).
        Familiarity with tools for working with Large Language Models via API or in a local context (e.g. HuggingFace transformers).
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        Strong experience with RESTful API integrations * Familiarity with authentication protocols (OAuth2, API keys)
        Strong experience with RESTful API integrations * Familiarity with authentication protocols (OAuth2, API keys)
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        NEW
        Strong hands-on knowledge of Azure integration services (Logic Apps, Azure Functions, Service Bus, API * Experience with REST API testing, Swagger/OpenAPI validation, and API test automation. * Experience with contract testing frameworks (Pact) and API mocking/stubbing approaches.
        Strong hands-on knowledge of Azure integration services (Logic Apps, Azure Functions, Service Bus, API * Experience with REST API testing, Swagger/OpenAPI validation, and API test automation. * Experience with contract testing frameworks (Pact) and API mocking/stubbing approaches.
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        Lead AI Engineer

        Change-IT Consulting Ltd
        London
        From £700 to £750 per day
        Familiarity with tools for working with Large Language Models via API or in a local context (e.g. HuggingFace transformers).
        Familiarity with tools for working with Large Language Models via API or in a local context (e.g. HuggingFace transformers).
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        NEW
        Deliver front-end excellence: Build fast, responsive web apps using Vite, React Query, Context API, and CSS frameworks. * Design for scale: Lead on API design, performance optimisation, and secure, cloud-ready architectures.
        Deliver front-end excellence: Build fast, responsive web apps using Vite, React Query, Context API, and CSS frameworks. * Design for scale: Lead on API design, performance optimisation, and secure, cloud-ready architectures.
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        NEW
        Design, develop, test and deliver application change to meet the needs of the FI Algo trading desks - this will include both API and schema design, and a significant amount of work on real-time KDB+ processes.
        Design, develop, test and deliver application change to meet the needs of the FI Algo trading desks - this will include both API and schema design, and a significant amount of work on real-time KDB+ processes.
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        PREMIUM

        Non-Functional Testing Engineer

        McGregor Boyall Associates Limited
        E1, East London
        £75000 - £850000 per annum + + Additional Benefits
        I'm supporting a client of mine in their search for a Non-Functional Testing Specialist to help define, shape, and manage their Non-Functional test requirements. *Please note that although Performance Testing is part of the role, this is a full-fledged Non-Functional Test Engineer role, covering Performance, Disaster Recovery, Microservices, Resilience, Alerting, Security & Monitoring.* As a specialist in non-functional testing, you will play a key role in supporting Product Owners by helping to define, refine, and manage non-functional test requirements. Collaborating closely with technical experts and analysts, you will convert these requirements into a comprehensive test strategy. You will also be responsible for ensuring that planning, preparation, and execution of the tests are carried out effectively and on schedule, in close coordination with the Infrastructure
        I'm supporting a client of mine in their search for a Non-Functional Testing Specialist to help define, shape, and manage their Non-Functional test requirements. *Please note that although Performance Testing is part of the role, this is a full-fledged Non-Functional Test Engineer role, covering Performance, Disaster Recovery, Microservices, Resilience, Alerting, Security & Monitoring.* As a specialist in non-functional testing, you will play a key role in supporting Product Owners by helping to define, refine, and manage non-functional test requirements. Collaborating closely with technical experts and analysts, you will convert these requirements into a comprehensive test strategy. You will also be responsible for ensuring that planning, preparation, and execution of the tests are carried out effectively and on schedule, in close coordination with the Infrastructure
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        NEW
        Espire Infolabs is hiring for MS Power Platform Engineer for London, UK location. Job Title: MS Power Platform Engineer - Job Type: Permanent - Job Location: London (3 Days/week onsite) We are seeking a skilled Power Platform Engineer with deep insurance industry expertise to design, develop, and implement automation solutions using Microsoft Power Platform technologies. The successful candidate will serve as a technical expert in Power Automate and broader Power Platform capabilities while effectively managing stakeholder relationships and driving digital transformation initiatives within the insurance and re-insurance domain. Key Responsibilities - Technical Development * Design and develop complex automation workflows using Power Automate (formerly Microsoft Flow) * Microsoft Copilot Studio * Build custom applications using Power Apps to meet specific business requ
        Espire Infolabs is hiring for MS Power Platform Engineer for London, UK location. Job Title: MS Power Platform Engineer - Job Type: Permanent - Job Location: London (3 Days/week onsite) We are seeking a skilled Power Platform Engineer with deep insurance industry expertise to design, develop, and implement automation solutions using Microsoft Power Platform technologies. The successful candidate will serve as a technical expert in Power Automate and broader Power Platform capabilities while effectively managing stakeholder relationships and driving digital transformation initiatives within the insurance and re-insurance domain. Key Responsibilities - Technical Development * Design and develop complex automation workflows using Power Automate (formerly Microsoft Flow) * Microsoft Copilot Studio * Build custom applications using Power Apps to meet specific business requ
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        NEWFEATURED

        Lead Android Engineer

        Halian Technology Limited
        London
        From £82,000 to £92,000 per annum
        Halian Technology are searching for an Lead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
        Halian Technology are searching for an Lead Android Engineerto join our clients forward-thinking mobile team. Our client isone of the UKs most trusted and innovative omni-channel retailers, where technology and customer experience go hand in hand. If youre passionate about delivering high-quality mobile experiences and want to work with modern tools, great people, and at a company where learning and development are core valuesthis is the role for you. * Influence architecture and development strategy within a high-performing Agile squad. * Provide technical assurance and guidance across complex, high-impact projects. * Collaborate cross-functionally with iOS Engineers, BAs, QAs, Designers, and UX Specialists. * Champion Android best practices including Accessibility, CI/CD, TDD, and clean architecture.
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        NEW

        Java Technical Lead

        G.R.E. Recruitment Limited
        GU1, Guildford
        From £80,000 to £90,000 per annum
        Tech Stack: Essential: Java 8+, Spring MVC, SpringBoot, REST API, I am looking for an Experienced Java Tech Lead who has been leading successful Java teams and is looking for a new challenge - the core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle.
        Tech Stack: Essential: Java 8+, Spring MVC, SpringBoot, REST API, I am looking for an Experienced Java Tech Lead who has been leading successful Java teams and is looking for a new challenge - the core tech stack is: Java 8+, Spring MVC, SpringBoot, REST API's and using build tools such as Maven/Gradle.
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        Experience with Microsoft Azure services, particularly Azure OpenAI, Azure AD, and integration services (e.g., Logic Apps, API Management). * Expertise in Microsoft Graph API, Microsoft 365 compliance and security, and identity management.
        Experience with Microsoft Azure services, particularly Azure OpenAI, Azure AD, and integration services (e.g., Logic Apps, API Management). * Expertise in Microsoft Graph API, Microsoft 365 compliance and security, and identity management.
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        FEATURED
        What we are building - Mimica's mission is to empower enterprises, teams, and individuals to reclaim their most precious resource time and work more efficiently, with greater purpose and impact. Our AI-powered task mining observes employee actions across the desktop and categorizes them into detailed process maps. Mimicas process intelligence highlights inefficiencies, prioritizes improvements based on ROI, recommends the optimal technology for automation (RPA, intelligent document processing, GenAI), and provides a blueprint for building new automations and transforming work. Our approach to engineering * We prioritize customer needs first * We work in small, project-based teams * We have flexibility in terms of the problems we work on * We own the full lifecycle of our projects * We avoid silos and encourage taking up tasks in new areas * We balance quality and velo
        What we are building - Mimica's mission is to empower enterprises, teams, and individuals to reclaim their most precious resource time and work more efficiently, with greater purpose and impact. Our AI-powered task mining observes employee actions across the desktop and categorizes them into detailed process maps. Mimicas process intelligence highlights inefficiencies, prioritizes improvements based on ROI, recommends the optimal technology for automation (RPA, intelligent document processing, GenAI), and provides a blueprint for building new automations and transforming work. Our approach to engineering * We prioritize customer needs first * We work in small, project-based teams * We have flexibility in terms of the problems we work on * We own the full lifecycle of our projects * We avoid silos and encourage taking up tasks in new areas * We balance quality and velo
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        About us - Climate X is a purpose-driven technology company, backed by GV (Google Ventures), Western Technologies (early investors in Meta, Google, Palantir), Commerz Ventures, Pale Blue Dot, Deloitte, and other world-class investors. We're a wonderfully diverse, growing team with physical offices in London and New York City. Demand for Climate X is growing fast, and we need to build our team! You'll be at the front of a nascent industry, working as part of a fantastic and diverse team, doing things that you can be proud of. We're excited to have the opportunity to speak with you during this process. Our mission - To deepen the understanding of our changing planet and inspire meaningful action. What we do * We're helping the world become more resilient to the impacts of physical climate risks (including floods, fires, storms and more).
        About us - Climate X is a purpose-driven technology company, backed by GV (Google Ventures), Western Technologies (early investors in Meta, Google, Palantir), Commerz Ventures, Pale Blue Dot, Deloitte, and other world-class investors. We're a wonderfully diverse, growing team with physical offices in London and New York City. Demand for Climate X is growing fast, and we need to build our team! You'll be at the front of a nascent industry, working as part of a fantastic and diverse team, doing things that you can be proud of. We're excited to have the opportunity to speak with you during this process. Our mission - To deepen the understanding of our changing planet and inspire meaningful action. What we do * We're helping the world become more resilient to the impacts of physical climate risks (including floods, fires, storms and more).
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        2 exact matches jobs are outside your preferred location

        When applying for roles at Tealium, please use our official careers page or LinkedIn company profile. All other sites where Tealium careers may appear may not be legitimate. WHO WE ARE Tealium is the trusted leader in real-time Customer Data Platforms (CDP), helping organizations unify their customer data to deliver more personalized, privacy-conscious experiences. As the demand for connected, intelligent customer engagement grows, Tealiums leadership in CDP is translating directly into leadership in enabling enterprise AI strategies. By providing clean, consented, and actionable data, Tealium empowers its customers to accelerate the adoption of AI and machine learning, fueling smarter personalization, predictive insights, and business outcomes at scale. More than 800 leading global brands trust Tealium to power their customer data strategies and deliver real-time, ..
        When applying for roles at Tealium, please use our official careers page or LinkedIn company profile. All other sites where Tealium careers may appear may not be legitimate. WHO WE ARE Tealium is the trusted leader in real-time Customer Data Platforms (CDP), helping organizations unify their customer data to deliver more personalized, privacy-conscious experiences. As the demand for connected, intelligent customer engagement grows, Tealiums leadership in CDP is translating directly into leadership in enabling enterprise AI strategies. By providing clean, consented, and actionable data, Tealium empowers its customers to accelerate the adoption of AI and machine learning, fueling smarter personalization, predictive insights, and business outcomes at scale. More than 800 leading global brands trust Tealium to power their customer data strategies and deliver real-time, ..
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        Engineering Lead

        McGregor Boyall Associates Limited
        SW1, South West London
        £90000.00 - £110000.00 per annum
        As Engineering Lead, you'll be at the forefront of their greenfield product development efforts, leading a cross-functional distributed engineering team. This high growth marketing agency is entering an exciting new phase of growth, driven by a product-led vision that will transform their business, and need an Engineering Lead with a polyglot mindset to play a key role in making it happen. * Lead, manage and mentor a high-performing engineering team, fostering a culture of ownership and continuous improvement. * Champion modern engineering practices, including CI/CD, automated testing, and DevOps. * Proven experience leading distributed engineering teams and delivering complex software projects. £90-110k - Location: 3-4 days per week in the office in
        As Engineering Lead, you'll be at the forefront of their greenfield product development efforts, leading a cross-functional distributed engineering team. This high growth marketing agency is entering an exciting new phase of growth, driven by a product-led vision that will transform their business, and need an Engineering Lead with a polyglot mindset to play a key role in making it happen. * Lead, manage and mentor a high-performing engineering team, fostering a culture of ownership and continuous improvement. * Champion modern engineering practices, including CI/CD, automated testing, and DevOps. * Proven experience leading distributed engineering teams and delivering complex software projects. £90-110k - Location: 3-4 days per week in the office in
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        Gen AI Solutions Engineer - London Hybrid

        Transparent Technology
        City of London, London, EC1A 4RN
        £75000 - £85000 per annum + bens, shares, pension
        As a Solutions Engineer / AI Engineer / LLM Engineer, you'll work directly with clients, design POCs and production-ready solutions, and deliver impact using LLMs, LangChain, Python, and Azure. Keywords: Solutions Engineer, AI Engineer, AI Consultant, Generative AI, Python, Azure, LangChain, LLMs, Hybrid London Solutions Engineer - Generative AI | Hybrid (London) | Up to £85,000 - Ready to take the lead in AI workflow automation? Join a profitable, fast-growing startup building cutting-edge GenAI solutions for the legal and compliance sector. With 3+ years' experience, excellent communication skills, and a passion for Generative AI, you'll thrive in a
        As a Solutions Engineer / AI Engineer / LLM Engineer, you'll work directly with clients, design POCs and production-ready solutions, and deliver impact using LLMs, LangChain, Python, and Azure. Keywords: Solutions Engineer, AI Engineer, AI Consultant, Generative AI, Python, Azure, LangChain, LLMs, Hybrid London Solutions Engineer - Generative AI | Hybrid (London) | Up to £85,000 - Ready to take the lead in AI workflow automation? Join a profitable, fast-growing startup building cutting-edge GenAI solutions for the legal and compliance sector. With 3+ years' experience, excellent communication skills, and a passion for Generative AI, you'll thrive in a
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        Lead Engineer - Global investment bank

        McGregor Boyall Associates Limited
        London
        £150000 - £180000 per annum + bonus, pension, healthcare
        This is an opportunity to join at SVP level as a hands-on Technical Lead, steering engineering standards, cloud strategy, and distributed system design for one of the most ambitious financial technology projects in the world. * Lead technical direction of a next-gen cross-asset risk platform - We are partnering with a global financial institution on a Greenfield platform build that will redefine large-scale risk and trading technology. Why apply? * Greenfield engineering - modern tech stack: Java, Spring Boot, Kubernetes (EKS & GKE), Kafka, Apache Ignite, MongoDB, RabbitMQ, Solace * Massive scale - billions of risk calculations per day across trading desks globally * Impact & visibility - shape the technical direction while mentoring global engineering teams * Hybrid working - Moorgate Innovation Lab, 2 days per week onsite * Compensa
        This is an opportunity to join at SVP level as a hands-on Technical Lead, steering engineering standards, cloud strategy, and distributed system design for one of the most ambitious financial technology projects in the world. * Lead technical direction of a next-gen cross-asset risk platform - We are partnering with a global financial institution on a Greenfield platform build that will redefine large-scale risk and trading technology. Why apply? * Greenfield engineering - modern tech stack: Java, Spring Boot, Kubernetes (EKS & GKE), Kafka, Apache Ignite, MongoDB, RabbitMQ, Solace * Massive scale - billions of risk calculations per day across trading desks globally * Impact & visibility - shape the technical direction while mentoring global engineering teams * Hybrid working - Moorgate Innovation Lab, 2 days per week onsite * Compensa
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        As a Principal AI Engineer ML Ops, your primary responsibility will be to architect, deploy, and maintain the systems that enable AI models to run reliably in production. As a Principal AI Engineer at Rapid7, you will lead the design and implementation of scalable ML Ops systems that take models from research to production with repeatable, secure, and observable deployment patterns. The AI Center of Excellence team brings together Data Scientists and AI Engineers to research, prototype, and build production-ready AI components. This role is ideal for someone with deep experience in software engineering, AI/ML systems, and DevOps/MLOps who wants to shape the future of applied AI in cybersecurity. We pa
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        Solutions Engineer

        THE IDOLS GROUP LIMITED
        London
        £80000 - £100000 per annum
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        Senior Calypso Engineer

        Hays
        EC1, City of London
        £700.0 - £739.0 per day + £739pd inside IR35
        As Senior Calypso Engineer, you will be working on a Continuous Upgrade Project - performing technical analysis and development as part of a move from Calypso v17 to Calypso v18. Your new company * Tier 1 globally recognised company - Your new role - What you'll need to succeed * Recent Calypso experience (v16 onwards) * Preferably experience working on upgrades * Experienced in Java * Devops experience (Ansible, Terraform, Git) What you'll get in return - An exciting opportunity to join an international organisation working with a major financial services organisation. Furthermore, a competitive day rate for this role will be offered in addition to your own dedicated Hays Consultant to guide you through every step of the application process. What you need to do now - If you're interested in this role, click 'apply now' to forward an
        As Senior Calypso Engineer, you will be working on a Continuous Upgrade Project - performing technical analysis and development as part of a move from Calypso v17 to Calypso v18. Your new company * Tier 1 globally recognised company - Your new role - What you'll need to succeed * Recent Calypso experience (v16 onwards) * Preferably experience working on upgrades * Experienced in Java * Devops experience (Ansible, Terraform, Git) What you'll get in return - An exciting opportunity to join an international organisation working with a major financial services organisation. Furthermore, a competitive day rate for this role will be offered in addition to your own dedicated Hays Consultant to guide you through every step of the application process. What you need to do now - If you're interested in this role, click 'apply now' to forward an
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        FryerMiles are delighted to be partnering with a renowned consultant to assist with their recruitment of multiple Palantir Engineers / Developers to join their team in London. * Active DV Clearance, UKEO * Palantir Foundry / Gotham experience * Strong engineering background * Strong coder with demonstrated proficiency in programming languages such as Python, TypeScript/JavaScript, or similar.
        FryerMiles are delighted to be partnering with a renowned consultant to assist with their recruitment of multiple Palantir Engineers / Developers to join their team in London. * Active DV Clearance, UKEO * Palantir Foundry / Gotham experience * Strong engineering background * Strong coder with demonstrated proficiency in programming languages such as Python, TypeScript/JavaScript, or similar.
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        AI Solutions Engineer

        McGregor Boyall Associates Limited
        EC1, City of London
        Negotiable
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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 15 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 IT, Software Development, Engineering, amongst many others.