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        9 Contract API jobs in London + 20 miles

        AI Engineer AI Agent Developer Backend Engineer

        Randstad Digital
        London
        Negotiable
        Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
        Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
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        NEWFEATURED
        World Wide Technology (WWT), a global technology integrator and IT solutions provider. World Wide Technology, established in 1990 in St. Louis, Missouri, collaborates with OEMs like Cisco and Dell EMC to offer infrastructure security and custom app development services to Fortune 500 companies in various sectors. With over 10,000 employees globally, we generate $17 billion in annual revenue and operate in regions including the US, UK, Canada, Europe, Costa Rica, APAC, and Middle East. We're proud to be consistently recognized as a top employer by Fortune and Glassdoor for over 13 years. World Wide Technology Holding Co, LLC (WWT) has an opportunity for a AI Platform Operations Manager. Below is the JD for the role. Please help me with the information needed to process your application, and I will contact you to discuss the role. This is a contract Role & Outside IR35
        World Wide Technology (WWT), a global technology integrator and IT solutions provider. World Wide Technology, established in 1990 in St. Louis, Missouri, collaborates with OEMs like Cisco and Dell EMC to offer infrastructure security and custom app development services to Fortune 500 companies in various sectors. With over 10,000 employees globally, we generate $17 billion in annual revenue and operate in regions including the US, UK, Canada, Europe, Costa Rica, APAC, and Middle East. We're proud to be consistently recognized as a top employer by Fortune and Glassdoor for over 13 years. World Wide Technology Holding Co, LLC (WWT) has an opportunity for a AI Platform Operations Manager. Below is the JD for the role. Please help me with the information needed to process your application, and I will contact you to discuss the role. This is a contract Role & Outside IR35
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        NEW
        4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
        4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
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        NEW
        We are building the first European Investment API that empowers businesses to offer seamless investment experiences to their users. We are looking for a full-time Head of Engineering to help us build a securities API for financial institutions, the first API of that kind in Europe. These teams are responsible for critical domains such as Orders, Trading Partner integrations, Position, and Wealth Management, all of which are essential for Upvests Investment API. The Brokerage Tribe plays a crucial role in the Investment API Platform, overseeing a wide range of user journey aspects. * Assume ownership of business-critical components within the Investment API, influencing its roadmap and delivering strategic impact to establish Upvest as a reliable partner. * Experience
        We are building the first European Investment API that empowers businesses to offer seamless investment experiences to their users. We are looking for a full-time Head of Engineering to help us build a securities API for financial institutions, the first API of that kind in Europe. These teams are responsible for critical domains such as Orders, Trading Partner integrations, Position, and Wealth Management, all of which are essential for Upvests Investment API. The Brokerage Tribe plays a crucial role in the Investment API Platform, overseeing a wide range of user journey aspects. * Assume ownership of business-critical components within the Investment API, influencing its roadmap and delivering strategic impact to establish Upvest as a reliable partner. * Experience
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        NEW
        Experience in creating custom Gutenberg blocks, custom RSS feeds, and WP-JSON API endpoints. * Integrating and using AWS services (S3, Lambda, EC2, API Gateway)
        Experience in creating custom Gutenberg blocks, custom RSS feeds, and WP-JSON API endpoints. * Integrating and using AWS services (S3, Lambda, EC2, API Gateway)
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        NEW
        Join Our Journey in Transforming Data into Insights - At CluedIn, we're reshaping the future of data management with an Azure-native, graph-based Modern Master Data Management (MDM) platform that simplifies and accelerates how businesses manage their datamaking it faster, smarter, and more accessible. Trusted by global industry leaders, our technology enables organisations to unlock the full value of their data and drive meaningful transformation. As Microsoft's preferred MDM partner and the first solution integrated with Azure OpenAI, we're setting new standards for innovation in this space. Backed by five-star reviews on Gartner Peer Insights and seamless integration with Microsoft's data services, CluedIn delivers powerful, scalable solutions built for the enterprise. Our team's expertise, passion, and bold ideas drive our innovation.
        Join Our Journey in Transforming Data into Insights - At CluedIn, we're reshaping the future of data management with an Azure-native, graph-based Modern Master Data Management (MDM) platform that simplifies and accelerates how businesses manage their datamaking it faster, smarter, and more accessible. Trusted by global industry leaders, our technology enables organisations to unlock the full value of their data and drive meaningful transformation. As Microsoft's preferred MDM partner and the first solution integrated with Azure OpenAI, we're setting new standards for innovation in this space. Backed by five-star reviews on Gartner Peer Insights and seamless integration with Microsoft's data services, CluedIn delivers powerful, scalable solutions built for the enterprise. Our team's expertise, passion, and bold ideas drive our innovation.
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        NEW
        About ElevenLabs - ElevenLabs is a research and product company defining the frontier of audio AI. Millions of people use our technology to read articles, voice over videos, and restore voices lost to disability. Leading developers and enterprises worldwide use ElevenLabs to build intelligent agents for support, sales, and education. We launched in January 2023 with the first AI model to cross the threshold of human-like speech. In January 2025, we raised a $180 million Series C round, valuing the company at $3.3 billion. By September 2025, that valuation doubled to $6.6 billion as we surpassed $200 million ARR in under three years. Our mission is to build the most important audio AI platform in the world, solve AI audio intelligence, and make information accessible in any voice, language, or sound.
        About ElevenLabs - ElevenLabs is a research and product company defining the frontier of audio AI. Millions of people use our technology to read articles, voice over videos, and restore voices lost to disability. Leading developers and enterprises worldwide use ElevenLabs to build intelligent agents for support, sales, and education. We launched in January 2023 with the first AI model to cross the threshold of human-like speech. In January 2025, we raised a $180 million Series C round, valuing the company at $3.3 billion. By September 2025, that valuation doubled to $6.6 billion as we surpassed $200 million ARR in under three years. Our mission is to build the most important audio AI platform in the world, solve AI audio intelligence, and make information accessible in any voice, language, or sound.
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        The Runa API empowers thousands of businesses to make payments to 5 billion+ consumers in 190+ countries instantly to cards, wallets, bank accounts and gift cards.
        The Runa API empowers thousands of businesses to make payments to 5 billion+ consumers in 190+ countries instantly to cards, wallets, bank accounts and gift cards.
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        NEW

        7 exact matches jobs are outside your preferred location

        About Teramind - Teramind is the leading platform for user behavior analytics, serving multiple use cases from insider risk mitigation to business process optimization. With our comprehensive suite of solutions, organizations gain unprecedented visibility into user activities while enhancing security, optimizing productivity, and ensuring compliance. Trusted by Fortune 500 companies and businesses of all sizes across industries, our innovative platform helps organizations protect sensitive data, maximize workforce performance, and create safer, more efficient digital workplaces. Through real-time monitoring and advanced analytics, we enable businesses to safeguard their most sensitive information while optimizing employee productivity in both in-office and remote work environments. Our Core Values - At Teramind, our values drive everything we do.
        About Teramind - Teramind is the leading platform for user behavior analytics, serving multiple use cases from insider risk mitigation to business process optimization. With our comprehensive suite of solutions, organizations gain unprecedented visibility into user activities while enhancing security, optimizing productivity, and ensuring compliance. Trusted by Fortune 500 companies and businesses of all sizes across industries, our innovative platform helps organizations protect sensitive data, maximize workforce performance, and create safer, more efficient digital workplaces. Through real-time monitoring and advanced analytics, we enable businesses to safeguard their most sensitive information while optimizing employee productivity in both in-office and remote work environments. Our Core Values - At Teramind, our values drive everything we do.
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        NEW

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        As a Programme Lead Engineer you will you will be responsible for ensuring a through life perspective is taken in the development and management of the Systems, Equipment, People and Process. * Previous experience either as a Project Lead Engineer or a Domain Lead Engineer (e.g. Systems, Hardware, Software) General Dynamics Mission Systems engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation. You will be responsible for meeting project requirements within cost and schedule constraints through detailed planning and monitoring the execution of the programme. Day to day you will provide direction, guidance and support to the development team ensuring that t
        As a Programme Lead Engineer you will you will be responsible for ensuring a through life perspective is taken in the development and management of the Systems, Equipment, People and Process. * Previous experience either as a Project Lead Engineer or a Domain Lead Engineer (e.g. Systems, Hardware, Software) General Dynamics Mission Systems engineers a diverse portfolio of high technology solutions, products and services that enable customers to successfully execute missions across all domains of operation. You will be responsible for meeting project requirements within cost and schedule constraints through detailed planning and monitoring the execution of the programme. Day to day you will provide direction, guidance and support to the development team ensuring that t
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        Principal Engineer

        Rise Technical Recruitment Limited
        Berlin
        €120000.00 - €150000.00 per annum
        Principal Software Engineer Berlin - Permanent Employee, Full-Time, Hybrid working (3 days a week on site) €120,000 - €150,000 + 20% Bonus + Holiday + Pension + Flexible Working Hours Excellent opportunity for an experienced Principal Engineer to step into a senior leadership role and contribute to a platform that revolutionises the diagnosis and treatment of cancer patients through cutting-edge AI and machine learning. You may have held titles such as Staff Engineer, Principal Engineer, or even CTO at a smaller company. You will own architecture across multiple teams, remaining close to the technology, whilst influencing more than 60 engineers and helping teams deliver scalable, secure, and reliable systems. The ideal candidate will be a master-level engineer with deep technical breadth, excellent mentoring skills, and experience making architectural decisions that s
        Principal Software Engineer Berlin - Permanent Employee, Full-Time, Hybrid working (3 days a week on site) €120,000 - €150,000 + 20% Bonus + Holiday + Pension + Flexible Working Hours Excellent opportunity for an experienced Principal Engineer to step into a senior leadership role and contribute to a platform that revolutionises the diagnosis and treatment of cancer patients through cutting-edge AI and machine learning. You may have held titles such as Staff Engineer, Principal Engineer, or even CTO at a smaller company. You will own architecture across multiple teams, remaining close to the technology, whilst influencing more than 60 engineers and helping teams deliver scalable, secure, and reliable systems. The ideal candidate will be a master-level engineer with deep technical breadth, excellent mentoring skills, and experience making architectural decisions that s
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        Method-Resourcing
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        £85000 - £90000 per annum + Bonus + Shares
        This is a hands-on Engineering Lead role (~30% coding) leading two agile squads through the modernisation of mission-critical systems and preparing for a greenfield front-end rebuild. Lead a hands-on engineering team through a major platform rebuild, moving from PHP to Native JavaScript, while shaping architecture, roadmaps, and upskilling a talented team. * Lead and mentor engineers, driving delivery excellence and best practice. * Partner with Product and Heads of Engineering to plan and execute technical roadmaps. * Manage technical debt, continuous improvement, and engineering quality. * Passionate about coaching, team development, and modern engineering practice. St Albans - (Hybrid) Up to £90,000 + Bonus + Benefits + lucrative shares scheme - Me
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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 contract API jobs are there in London?
        There are 9 contract API jobs within 20 miles of London available on JustEngineers right now.

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