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        40 Contract API jobs in London + 20 miles

        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
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        Software Engineer

        Centrica - CHP
        Windsor, Berkshire
        Competitive + Benefits
        Experience in cloud based and API driven architectures.
        Experience in cloud based and API driven architectures.
        PREMIUM
        As part of this journey, they're looking for an Engineering Manager to build and lead a brand-new engineering function focused on developing scalable Python services, API architecture, and large-scale data integrations that enable AI products across the organisation. * Experience delivering API-first platforms and distributed systems.
        As part of this journey, they're looking for an Engineering Manager to build and lead a brand-new engineering function focused on developing scalable Python services, API architecture, and large-scale data integrations that enable AI products across the organisation. * Experience delivering API-first platforms and distributed systems.
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        FEATURED
        Agility core practices, Agility core practices, API and platform design, Cloud Platforms, Collaboration, Communication, Configuration management and release, Continuous deployment and release, Creating a high performing team, Database Design, Digital Project Management, Documentation and knowledge sharing, Emerging technology monitoring, Facilitation, Information Security, Mentoring, Metrics definition and instrumentation, NoSql data modelling, Problem Solving, Relational Data Modelling, Risk Management, Scripting, Secure development, Service operations and resiliency, Software Design and Development {+ 7 more}
        Agility core practices, Agility core practices, API and platform design, Cloud Platforms, Collaboration, Communication, Configuration management and release, Continuous deployment and release, Creating a high performing team, Database Design, Digital Project Management, Documentation and knowledge sharing, Emerging technology monitoring, Facilitation, Information Security, Mentoring, Metrics definition and instrumentation, NoSql data modelling, Problem Solving, Relational Data Modelling, Risk Management, Scripting, Secure development, Service operations and resiliency, Software Design and Development {+ 7 more}
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        Accountability for a portion of the ~150 site External Manufacturing (EM) network, which covers Medicines and Vaccines Large Molecule Drug Substance and Drug Product, Medicine Small Molecule API and secondary, including newer product types such as Antibody Drug Conjugates and Oligonucleotides. * Engineering experience in small molecule primary and secondary, including API (Active Pharmaceutical Ingredient) /high toxicity API manufacture.
        Accountability for a portion of the ~150 site External Manufacturing (EM) network, which covers Medicines and Vaccines Large Molecule Drug Substance and Drug Product, Medicine Small Molecule API and secondary, including newer product types such as Antibody Drug Conjugates and Oligonucleotides. * Engineering experience in small molecule primary and secondary, including API (Active Pharmaceutical Ingredient) /high toxicity API manufacture.
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        A rewarding place to work. At Rathbones, We invest in everyone's tomorrow that includes our people. We are always looking for future talent, and we can help you build a rewarding career with clear paths to progression and the opportunity to share in the success of our business. Role Title: SuccessFactors Technical Engineer (Talent & Performance) Division: People Operations & Projects - Location: Liverpool, Glasgow, London - Contract: FTC - Working pattern: Hybrid - About the Role - The SuccessFactors Technical Engineer is a hands-on configuration and technical delivery role responsible for building, testing, documenting and deploying changes with the Groups SAP SuccessFactors product suite. Working from requirements, priorities and solution direction provided by the People Systems Lead, the role translates agreed requirements into high-quality system configuration, validates changes ...
        A rewarding place to work. At Rathbones, We invest in everyone's tomorrow that includes our people. We are always looking for future talent, and we can help you build a rewarding career with clear paths to progression and the opportunity to share in the success of our business. Role Title: SuccessFactors Technical Engineer (Talent & Performance) Division: People Operations & Projects - Location: Liverpool, Glasgow, London - Contract: FTC - Working pattern: Hybrid - About the Role - The SuccessFactors Technical Engineer is a hands-on configuration and technical delivery role responsible for building, testing, documenting and deploying changes with the Groups SAP SuccessFactors product suite. Working from requirements, priorities and solution direction provided by the People Systems Lead, the role translates agreed requirements into high-quality system configuration, validates changes ...
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        FEATURED
        A rewarding place to work. At Rathbones, We invest in everyone's tomorrow that includes our people. We are always looking for future talent, and we can help you build a rewarding career with clear paths to progression and the opportunity to share in the success of our business. Role Title: SuccessFactors Technical Engineer (EC Core, Platforms, Integration) Division: People Operations & Projects - Location: Liverpool, Glasgow, London - Contract: FTC - Working pattern: Hybrid - About the Role - The SuccessFactors Technical Engineer is a hands-on configuration and technical delivery role responsible for building, testing, documenting and deploying changes with the Groups SAP SuccessFactors product suite. Working from requirements, priorities and solution direction provided by the People Systems Lead, the role translates agreed requirements into high-quality system configuration, validates ...
        A rewarding place to work. At Rathbones, We invest in everyone's tomorrow that includes our people. We are always looking for future talent, and we can help you build a rewarding career with clear paths to progression and the opportunity to share in the success of our business. Role Title: SuccessFactors Technical Engineer (EC Core, Platforms, Integration) Division: People Operations & Projects - Location: Liverpool, Glasgow, London - Contract: FTC - Working pattern: Hybrid - About the Role - The SuccessFactors Technical Engineer is a hands-on configuration and technical delivery role responsible for building, testing, documenting and deploying changes with the Groups SAP SuccessFactors product suite. Working from requirements, priorities and solution direction provided by the People Systems Lead, the role translates agreed requirements into high-quality system configuration, validates ...
        more
        FEATURED
        Senior Software Engineer, AI - Location: London (Hybrid: 2 days in office, 3 days remote) Position Type: Permanent - Are you a seasoned software engineer passionate about pushing the boundaries of what's possible with Generative AI? We are a leading global provider of financial information services, insights, data, and analytics. We are currently seeking a Senior Software Engineer, AI to join our team in London. In this role, you will drive high-impact AI initiatives, design production-ready generative AI platforms, and build scalable, enterprise-grade solutions that shape the future of global markets. What We Offer * Transformative AI Impact: Design and deploy production-ready GenAI platforms, multi-agent systems, and intelligent automation that reshape products in real-time. * Cutting-Edge Tech Stack: Experiment with the latest LLMs, architect RAG implementations, design ...
        Senior Software Engineer, AI - Location: London (Hybrid: 2 days in office, 3 days remote) Position Type: Permanent - Are you a seasoned software engineer passionate about pushing the boundaries of what's possible with Generative AI? We are a leading global provider of financial information services, insights, data, and analytics. We are currently seeking a Senior Software Engineer, AI to join our team in London. In this role, you will drive high-impact AI initiatives, design production-ready generative AI platforms, and build scalable, enterprise-grade solutions that shape the future of global markets. What We Offer * Transformative AI Impact: Design and deploy production-ready GenAI platforms, multi-agent systems, and intelligent automation that reshape products in real-time. * Cutting-Edge Tech Stack: Experiment with the latest LLMs, architect RAG implementations, design ...
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        FEATURED
        Help Shape the Future of AI at ECA International - What if you could help build the AI-native future of a global business? At ECA International, we're already using AI across software development, data ingestion and delivery, with the governance and guardrails in place to support it safely within an enterprise environment. Now we're looking for an Engineering Tech Lead Data & AI to help us scale that capability further. You'll help evolve our existing data platform, built on AWS, Snowflake, S3, Postgres and event-driven services, into an AI-ready foundation that supports new Data Production and Data Discovery experiences across the business. This is an opportunity to work at the intersection of data, engineering and AI, helping to build practical solutions that create real value for both our teams and our clients.
        Help Shape the Future of AI at ECA International - What if you could help build the AI-native future of a global business? At ECA International, we're already using AI across software development, data ingestion and delivery, with the governance and guardrails in place to support it safely within an enterprise environment. Now we're looking for an Engineering Tech Lead Data & AI to help us scale that capability further. You'll help evolve our existing data platform, built on AWS, Snowflake, S3, Postgres and event-driven services, into an AI-ready foundation that supports new Data Production and Data Discovery experiences across the business. This is an opportunity to work at the intersection of data, engineering and AI, helping to build practical solutions that create real value for both our teams and our clients.
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        FEATURED
        About this role - Full Stack Developer (Associate) London Engineering Team (Preqin & eFront | BlackRock) Preqin (part of BlackRock) is looking for a skilled Full Stack Developer (Associate) to join our London Engineering Team. In this role, youll help design, build, and run products across Preqin and eFront, supporting applications used by clients globally. Youll collaborate with a high-performing, international team and work across both the technical and functional layers of the product in a fast-growing Private Markets environment. Youll contribute to delivering scalable, cloud-first solutions using modern engineering practices and technologies including .NET, Azure, and modern web frameworks. Python, AWSand Snowflake experience are a plus. Technologies & Concepts * Backend: .NET 8 / .NET 10 (primary) * Frontend: React / TypeScript / Micro front-end architecture
        About this role - Full Stack Developer (Associate) London Engineering Team (Preqin & eFront | BlackRock) Preqin (part of BlackRock) is looking for a skilled Full Stack Developer (Associate) to join our London Engineering Team. In this role, youll help design, build, and run products across Preqin and eFront, supporting applications used by clients globally. Youll collaborate with a high-performing, international team and work across both the technical and functional layers of the product in a fast-growing Private Markets environment. Youll contribute to delivering scalable, cloud-first solutions using modern engineering practices and technologies including .NET, Azure, and modern web frameworks. Python, AWSand Snowflake experience are a plus. Technologies & Concepts * Backend: .NET 8 / .NET 10 (primary) * Frontend: React / TypeScript / Micro front-end architecture
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        Project Manager - Finance & Technology

        Cadence Resourcing Limited
        London
        Up to £0.00 per day + On Application
        Project Manager, Finance Systems, Integrations, OTC, Order to Cash, O2C, technology transformation - Experienced Project Manager required by global organisation to lead a Finance and Technology workstream focused on Order-to-Cash (OTC). You'll own delivery and end to end-shaping plans, aligning stakeholders, and driving execution across Finance, IT, and external vendors. Key responsibilities include delivering initiatives within your workstream, proactively managing risks, issues, and dependencies, and coordinating cross-functional teams and suppliers to ensure success. The role requires high-quality delivery aligned to program priorities, backed by disciplined governance and transparent reporting. You'll bring extensive experience of autonomous project management within a larger programme, with hands-on experience partnering closely with Finance and IT teams on OTC ...
        Project Manager, Finance Systems, Integrations, OTC, Order to Cash, O2C, technology transformation - Experienced Project Manager required by global organisation to lead a Finance and Technology workstream focused on Order-to-Cash (OTC). You'll own delivery and end to end-shaping plans, aligning stakeholders, and driving execution across Finance, IT, and external vendors. Key responsibilities include delivering initiatives within your workstream, proactively managing risks, issues, and dependencies, and coordinating cross-functional teams and suppliers to ensure success. The role requires high-quality delivery aligned to program priorities, backed by disciplined governance and transparent reporting. You'll bring extensive experience of autonomous project management within a larger programme, with hands-on experience partnering closely with Finance and IT teams on OTC ...
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        FEATURED
        Founding AI Engineer - Location: London (Hybrid / Flexible) Salary: Competitive DOE + Bonus + Equity - Company Overview - We are working with an early-stage technology company building AI-native systems that help large organisations better understand, govern, and secure complex data and identity ecosystems. Operating at the intersection of AI, cyber security, and enterprise data platforms, the business is focused on transforming how organisations model access, risk, and data relationships across increasingly distributed cloud environments. The team is small, highly technical, and product-focused, with a strong bias toward ownership, rapid iteration, and building systems that operate in complex, real-world enterprise environments. Engineering sits at the centre of everything, and individuals are expected to have a direct impact on product direction and architecture. The Role
        Founding AI Engineer - Location: London (Hybrid / Flexible) Salary: Competitive DOE + Bonus + Equity - Company Overview - We are working with an early-stage technology company building AI-native systems that help large organisations better understand, govern, and secure complex data and identity ecosystems. Operating at the intersection of AI, cyber security, and enterprise data platforms, the business is focused on transforming how organisations model access, risk, and data relationships across increasingly distributed cloud environments. The team is small, highly technical, and product-focused, with a strong bias toward ownership, rapid iteration, and building systems that operate in complex, real-world enterprise environments. Engineering sits at the centre of everything, and individuals are expected to have a direct impact on product direction and architecture. The Role
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        We deliver the industrys most advanced platform for Any API, Any Event, and Any AI Agent , trusted by global leaders like Michelin, Roche, and Blue Yonder. * The Mission : We are the first to bridge traditional API Management with the new frontier of AI Agent Security - As an Engineering Manage r , you will lead engineering teams building the next generation of API infrastructure. * Experience and understanding of architecture principles across infrastructure platforms, API, security, data, integration, and application layers
        We deliver the industrys most advanced platform for Any API, Any Event, and Any AI Agent , trusted by global leaders like Michelin, Roche, and Blue Yonder. * The Mission : We are the first to bridge traditional API Management with the new frontier of AI Agent Security - As an Engineering Manage r , you will lead engineering teams building the next generation of API infrastructure. * Experience and understanding of architecture principles across infrastructure platforms, API, security, data, integration, and application layers
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        Lead and contribute to hands-on development of integration solutions using Logic Apps, Function components, Message Bus services, Event Grid services, and API Manager instances * Design and implement solutions using Azure integration services (e.g. Logic Apps, Function components, Message Bus services, Event Grid services, and API Manager instances) * Strong background in .NET / C# application development and API-based architectures.
        Lead and contribute to hands-on development of integration solutions using Logic Apps, Function components, Message Bus services, Event Grid services, and API Manager instances * Design and implement solutions using Azure integration services (e.g. Logic Apps, Function components, Message Bus services, Event Grid services, and API Manager instances) * Strong background in .NET / C# application development and API-based architectures.
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        We deliver the industrys most advanced platform for Any API, Any Event, and Any AI Agent , trusted by global leaders like Michelin, Roche, and Blue Yonder. * The Mission : We are the first to bridge traditional API Management with the new frontier of AI Agent Security
        We deliver the industrys most advanced platform for Any API, Any Event, and Any AI Agent , trusted by global leaders like Michelin, Roche, and Blue Yonder. * The Mission : We are the first to bridge traditional API Management with the new frontier of AI Agent Security
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        Able to reproduce, isolate and explain issues using logs, API responses, and tests. * Familiar with API based integration methods, associated best practices, and related tools/frameworks (REST/JSON APIs, Postman).
        Able to reproduce, isolate and explain issues using logs, API responses, and tests. * Familiar with API based integration methods, associated best practices, and related tools/frameworks (REST/JSON APIs, Postman).
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        Experience with Azure API Management or similar API gateways. * API Development & Integration * REST API development and integration * API Management / API Gateway patterns
        Experience with Azure API Management or similar API gateways. * API Development & Integration * REST API development and integration * API Management / API Gateway patterns
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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 40 contract API jobs within 20 miles of London available on JustEngineers right now.

        Where in London are these contract jobs?
        You can find contract jobs in City of London, South East London, Sunbury-On-Thames.

        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, Software Development, amongst many others.