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        114 Contract API jobs in London + 20 miles

        Test Lead

        Mindera
        London
        Competitive
        Select, implement, and optimise testing tools and environments across functional, API, and performance testing.
        Select, implement, and optimise testing tools and environments across functional, API, and performance testing.
        more
        You understand how customer data moves through CRM systems, including events and API-driven attributes
        You understand how customer data moves through CRM systems, including events and API-driven attributes
        NEW
        Conduct API testing to ensure robust and reliable integration between services. * Understanding of API testing , including tools like Postman or similar.
        Conduct API testing to ensure robust and reliable integration between services. * Understanding of API testing , including tools like Postman or similar.
        more
        Strong understanding of cloud native architectures, SaaS solutions (Salesforce, SAP, Dynamics CRM,ServiceNow, etc..), cybersecurity posture fundamentals, API ecosystems and legacy on-premise enterprise architectures
        Strong understanding of cloud native architectures, SaaS solutions (Salesforce, SAP, Dynamics CRM,ServiceNow, etc..), cybersecurity posture fundamentals, API ecosystems and legacy on-premise enterprise architectures
        more
        Post-training techniques for planning, reasoning & complex workflows (e.g., Reasoning Models, LLMs + Knowledge Graphs, Test time compute, CoT pipelines, Tool use & API calling, etc.)
        Post-training techniques for planning, reasoning & complex workflows (e.g., Reasoning Models, LLMs + Knowledge Graphs, Test time compute, CoT pipelines, Tool use & API calling, etc.)
        more

        32 exact matches jobs are outside your preferred location

        ServiceNow Architect

        Syntax Consultancy Limited
        Reading, Berkshire, RG1 1LZ
        500-525/day (Outside IR35)
        6 Month Contract - Reading (Hybrid) £500-525/day (Outside IR35) Start ideally in Dec 2025 / Jan 2026. A chance to work with a global IT Consultancy on a ServiceNow design + integration project for an external client. Hybrid Working - 2 days/week working remotely (WFH) + 3 days/week working from the office in Reading. Paying up to £525/day (Outside IR35). * In-depth hands-on ServiceNow Architecture expertise including design, configuration + implementation. * Deep ServiceNow modules + workflows experience including: ITSM, ITOM, Discovery, ITAM, CSM, HRSD, SecOps, GRC). * Managing integrations between ServiceNow and other systems (via REST, SOAP APIs, IntegrationHub, MID Server, custom integrations), ensuring reliability, security, latency, error handling, monitoring. * Defining + implementing technical governance, architecture operating models, and instance strategy.
        6 Month Contract - Reading (Hybrid) £500-525/day (Outside IR35) Start ideally in Dec 2025 / Jan 2026. A chance to work with a global IT Consultancy on a ServiceNow design + integration project for an external client. Hybrid Working - 2 days/week working remotely (WFH) + 3 days/week working from the office in Reading. Paying up to £525/day (Outside IR35). * In-depth hands-on ServiceNow Architecture expertise including design, configuration + implementation. * Deep ServiceNow modules + workflows experience including: ITSM, ITOM, Discovery, ITAM, CSM, HRSD, SecOps, GRC). * Managing integrations between ServiceNow and other systems (via REST, SOAP APIs, IntegrationHub, MID Server, custom integrations), ensuring reliability, security, latency, error handling, monitoring. * Defining + implementing technical governance, architecture operating models, and instance strategy.
        more

        Engineering Manager - Quality

        Infosum Limited
        Basingstoke, Hampshire
        £80,000 - £150,000 a year
        You will be able to understand and reason about a complex distributed system with a comprehensive data processing API, the ability to process a wide range of complex input data types, and the capability to query that data with a SQL-like query engine.
        You will be able to understand and reason about a complex distributed system with a comprehensive data processing API, the ability to process a wide range of complex input data types, and the capability to query that data with a SQL-like query engine.
        more
        AI Engineer, Software Engineer, Machine Learning Engineer, LLM, GenAI, Agentic, LangChain, LangGraph, Langfuse, Python, Backend, API, MLflow, W&B, DVC, Evaluation, RAG, Retrieval, Semantic Search, Multimodal, Computer Vision, Speech-to-Text, Cloud, AWS, Azure, Model Deployment, UK Remote, Contractor, EdTech, Assessment Systems, Automated Scoring, Git, GitHub, UK Hours
        AI Engineer, Software Engineer, Machine Learning Engineer, LLM, GenAI, Agentic, LangChain, LangGraph, Langfuse, Python, Backend, API, MLflow, W&B, DVC, Evaluation, RAG, Retrieval, Semantic Search, Multimodal, Computer Vision, Speech-to-Text, Cloud, AWS, Azure, Model Deployment, UK Remote, Contractor, EdTech, Assessment Systems, Automated Scoring, Git, GitHub, UK Hours
        more
        You will work across a wide portfolio of systems and services to enable reliable data movement, API-based integration, and modern cloud-driven workflows.
        You will work across a wide portfolio of systems and services to enable reliable data movement, API-based integration, and modern cloud-driven workflows.
        more
        FEATURED
        We are looking for a highly skilled Lead Business Analyst / Product Owner to lead the design, development, and delivery of API solutions that enable seamless integration across our digital ecosystem. This hybrid role combines strategic product ownership with hands-on business analysis to ensure our API platform meets business needs, enhances interoperability, and supports scalable growth. * Define and own the API product backlog, aligning with business objectives and technology strategy. * Act as the voice of the customer for API consumers, ensuring usability and developer experience. * Gather, analyze, and document functional and non-functional requirements for API development. * Collaborate with architects and engineering teams to design API specifications, JSON, XM
        We are looking for a highly skilled Lead Business Analyst / Product Owner to lead the design, development, and delivery of API solutions that enable seamless integration across our digital ecosystem. This hybrid role combines strategic product ownership with hands-on business analysis to ensure our API platform meets business needs, enhances interoperability, and supports scalable growth. * Define and own the API product backlog, aligning with business objectives and technology strategy. * Act as the voice of the customer for API consumers, ensuring usability and developer experience. * Gather, analyze, and document functional and non-functional requirements for API development. * Collaborate with architects and engineering teams to design API specifications, JSON, XM
        more
        PREMIUM
        Looking for a Technical Business Analyst to support squads across a high-profile digital environment. You'll work closely with technical and business teams, shaping requirements and supporting delivery from discovery through to live service. The role requires someone confident engaging directly with technical and business stakeholders, translating business needs into technical requirements, and supporting squads through the full lifecycle. * Gather and refine requirements with stakeholders * Translate discovery outputs into clear epics and user stories * Work with architects and developers to validate technical feasibility * Understand RESTful APIs, data flows, and integration patterns * Contribute to agile ceremonies and support iterative delivery * Work across legacy and modern service environments * Proven experience as a Technical BA within digital or engineering
        Looking for a Technical Business Analyst to support squads across a high-profile digital environment. You'll work closely with technical and business teams, shaping requirements and supporting delivery from discovery through to live service. The role requires someone confident engaging directly with technical and business stakeholders, translating business needs into technical requirements, and supporting squads through the full lifecycle. * Gather and refine requirements with stakeholders * Translate discovery outputs into clear epics and user stories * Work with architects and developers to validate technical feasibility * Understand RESTful APIs, data flows, and integration patterns * Contribute to agile ceremonies and support iterative delivery * Work across legacy and modern service environments * Proven experience as a Technical BA within digital or engineering
        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 contract API jobs are there in London?
        There are 114 contract API jobs within 20 miles of London available on CWJobs right now.

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

        What other similar jobs are there to contract API jobs in London?
        As well as contract API jobs in London, you can find contract Qa Automation, Quality Assurance, QA Analyst, amongst many others.