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23 Contract API jobs in Croxley Green + 20 miles
151 exact matches jobs are outside your preferred location
Experience with API design and implementing authentication/authorisation flows
Experience with API design and implementing authentication/authorisation flows
Familiarity with real-time data processing, event-driven systems, and API-first design.
Familiarity with real-time data processing, event-driven systems, and API-first design.
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API.
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API.
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.
Web API Services
Web API Services
Familiarity with API design and working in distributed systems
Familiarity with API design and working in distributed systems
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
Proficiency in API design and integration.
Proficiency in API design and integration.
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.
Software Engineer - Python, Cloud Architecture, Databricks (or similar tech stack) - hybrid
Software Engineer - Python, Cloud Architecture, Databricks (or similar tech stack) - hybrid
FactSet Europe Ltd
London
Competitive
Proficient in Python/Typescript/Nodejs , with strong skills in API development .
Proficient in Python/Typescript/Nodejs , with strong skills in API development .
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Experience with Iron Python and the API-Rest Framework.
Experience with Iron Python and the API-Rest Framework.
Proficient in headless CMS integrations (Kontent.ai, Contentful) and API-driven development
Proficient in headless CMS integrations (Kontent.ai, Contentful) and API-driven development
Powered by our proprietary Play&Plug technology platform , we offer API-based solutions and manage fully cloud-native insurance programs.
Powered by our proprietary Play&Plug technology platform , we offer API-based solutions and manage fully cloud-native insurance programs.
As an emerging leader in the $10B+ communications API market, we empower global brands to connect better with their customers, employees, and partners through transformative communications experiences. For example, Vonage API solutions empower organizations to build their custom omnichannel communications structure.
As an emerging leader in the $10B+ communications API market, we empower global brands to connect better with their customers, employees, and partners through transformative communications experiences. For example, Vonage API solutions empower organizations to build their custom omnichannel communications structure.
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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
You possess a strong understanding of cloud computing, microservices, API design, and event-driven architectures.
You possess a strong understanding of cloud computing, microservices, API design, and event-driven architectures.
Manager, Lead Research Scientist, Training Data (Foundational Research)
Manager, Lead Research Scientist, Training Data (Foundational Research)
Thomson Reuters
London
Competitive
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.)
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
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Integrate automated API security testing workflows into the platform, ensuring reliability and accuracy of results.
Integrate automated API security testing workflows into the platform, ensuring reliability and accuracy of results.
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Azure API Management
Azure API Management
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Experience with cloud security, zero trust, API security, and secure CI CD pipelines.
Experience with cloud security, zero trust, API security, and secure CI CD pipelines.
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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
PREMIUM
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Your role as a GCP APIGEE specialist involves supporting teams with modern DevOps solutions, curating scalable GCP Cloud Products as IaaC, and building APIGEE/API solutions while modernising the APIGEE gateway. * Hands-on development and management of Google Apigee API Management Platform * Design, build, and deploy API proxies, policies, and configurations in Apigee * Implement CI/CD pipelines for API lifecycle management using tools like Jenkins, GitHub Actions, or Harness * Develop and maintain API security policies (OAuth, JWT, mTLS, rate limiting, threat protection) * Build automated workflows and scripts for API operations using Python * Manage API analytics, monitoring, and logging for performance and compliance * Enforce GCP Organization Polic
Your role as a GCP APIGEE specialist involves supporting teams with modern DevOps solutions, curating scalable GCP Cloud Products as IaaC, and building APIGEE/API solutions while modernising the APIGEE gateway. * Hands-on development and management of Google Apigee API Management Platform * Design, build, and deploy API proxies, policies, and configurations in Apigee * Implement CI/CD pipelines for API lifecycle management using tools like Jenkins, GitHub Actions, or Harness * Develop and maintain API security policies (OAuth, JWT, mTLS, rate limiting, threat protection) * Build automated workflows and scripts for API operations using Python * Manage API analytics, monitoring, and logging for performance and compliance * Enforce GCP Organization Polic
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Strong background in system/API design.
Strong background in system/API design.
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Contract: Automation Architect - Start Date: ASAP - Duration: 6 months - Location: Remote - UK - Rate: circa £550 - £590 per day outside of IR35 - This role is for a highly skilled and experienced Automation Architect responsible for the end-to-end delivery of on-premise private cloud infrastructure automation solutions. The ideal person will bridge the gap between architectural design, process analysis, and hands-on implementation, ensuring that infrastructure is provisioned and managed efficiently via Infrastructure as Code (IaC) principles utilizing a robust CI/CD pipeline orchestrated by Git runner technology. This automation will specifically target the deployment and management of environments hosting Containers (e.g., Kubernetes, OpenShift) and traditional Virtual Machines (VMs). Responsibilities - Strategy and Analysis
Contract: Automation Architect - Start Date: ASAP - Duration: 6 months - Location: Remote - UK - Rate: circa £550 - £590 per day outside of IR35 - This role is for a highly skilled and experienced Automation Architect responsible for the end-to-end delivery of on-premise private cloud infrastructure automation solutions. The ideal person will bridge the gap between architectural design, process analysis, and hands-on implementation, ensuring that infrastructure is provisioned and managed efficiently via Infrastructure as Code (IaC) principles utilizing a robust CI/CD pipeline orchestrated by Git runner technology. This automation will specifically target the deployment and management of environments hosting Containers (e.g., Kubernetes, OpenShift) and traditional Virtual Machines (VMs). Responsibilities - Strategy and Analysis