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65 Contract API jobs in Oxfordshire + 20 miles
660 exact matches jobs are outside your preferred location
We've created an industry-leading platform with comprehensive online tools and API access, to meet the demands of daily business payments.
We've created an industry-leading platform with comprehensive online tools and API access, to meet the demands of daily business payments.
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.)
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Mastercard Developers ( is the primary API platform for Mastercard partners to access a diverse range of payment, data, loyalty, and security APIs. The team is responsible for delivering an experience that ensures developers can quickly find the right API, assess its technical capabilities and integrate it into new and innovative solutions. Act as subject matter expert for Mastercard Developers API Platform and services to support customer integrations on occasion - Proven track record in API based products
Mastercard Developers ( is the primary API platform for Mastercard partners to access a diverse range of payment, data, loyalty, and security APIs. The team is responsible for delivering an experience that ensures developers can quickly find the right API, assess its technical capabilities and integrate it into new and innovative solutions. Act as subject matter expert for Mastercard Developers API Platform and services to support customer integrations on occasion - Proven track record in API based products
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££85,000 - £110,000 GBP - Onsite WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Level: Senior / Lead Architect - £85,000 - £110,000 - Locations: London | Hybrid | Remote flexibility - Function: Cloud Architecture | DevSecOps | Digital Infrastructure - Industry: Enterprise Technology Services - Lead cloud innovation that transforms enterprise-scale operations. A global leader in mission-critical technology infrastructure is seeking an experienced Cloud Architect to design and deliver next-generation cloud and hybrid environments. This organisation helps Fortune 500 businesses modernise their IT foundations, enabling scalability, agility, and long-term resilience. About the Role - As a Cloud Architect, you'll play a pivotal role in the architecture and implementation of complex cloud solutions.
££85,000 - £110,000 GBP - Onsite WORKING - Location: Central London, Greater London - United Kingdom Type: Permanent - Level: Senior / Lead Architect - £85,000 - £110,000 - Locations: London | Hybrid | Remote flexibility - Function: Cloud Architecture | DevSecOps | Digital Infrastructure - Industry: Enterprise Technology Services - Lead cloud innovation that transforms enterprise-scale operations. A global leader in mission-critical technology infrastructure is seeking an experienced Cloud Architect to design and deliver next-generation cloud and hybrid environments. This organisation helps Fortune 500 businesses modernise their IT foundations, enabling scalability, agility, and long-term resilience. About the Role - As a Cloud Architect, you'll play a pivotal role in the architecture and implementation of complex cloud solutions.
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Ability to learn and speak to eBays API, feeds, and other pathways for onboarding
Ability to learn and speak to eBays API, feeds, and other pathways for onboarding
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Experience working with software systems including querying, SQL scripting, and working with API development * Technical understanding of Meta advertising products (including Ads and Pages API, Identity Platform) * Experience working with API documents, calling APIs using scripts, and testing APIs
Experience working with software systems including querying, SQL scripting, and working with API development * Technical understanding of Meta advertising products (including Ads and Pages API, Identity Platform) * Experience working with API documents, calling APIs using scripts, and testing APIs
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Familiarity with SharePoint, Dynamics 365, Azure, API integrations, and scripting languages like PowerShell or JavaScript.
Familiarity with SharePoint, Dynamics 365, Azure, API integrations, and scripting languages like PowerShell or JavaScript.
FEATURED
Strong knowledge of AWS services (Lambda, SNS, S3, EKS, API Gateway) * Experience with API/interface modelling and CI/CD (e.g. GitHub Actions)
Strong knowledge of AWS services (Lambda, SNS, S3, EKS, API Gateway) * Experience with API/interface modelling and CI/CD (e.g. GitHub Actions)
PREMIUM
The candidate will hold specialization in designing web applications, middleware/API layer and AWS.
The candidate will hold specialization in designing web applications, middleware/API layer and AWS.
Integration Lead- Salesforce Education Cloud-Student Systems Implementation
Integration Lead- Salesforce Education Cloud-Student Systems Implementation
InterQuest Group (UK) Limited
UK
£500 - 550 per day
Excellent skills in designing and delivering integrations using Microsoft Azure PaaS (Functions, Logic Apps, API Management, Service Bus,) * Expertise in integration strategy, API management, and canonical data models.
Excellent skills in designing and delivering integrations using Microsoft Azure PaaS (Functions, Logic Apps, API Management, Service Bus,) * Expertise in integration strategy, API management, and canonical data models.
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API Spec (Swagger OpenAPI)
API Spec (Swagger OpenAPI)
FEATURED
Experience with API data modeling, CI/CD (GitHub Actions).
Experience with API data modeling, CI/CD (GitHub Actions).
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The ideal candidate will have proven experience with Node.js and/or Java (v21+) for backend development, as well as a strong knowledge of microservices architecture and RESTful API design. - Familiarity with API Gateway platforms such as WSO2 or similar.
The ideal candidate will have proven experience with Node.js and/or Java (v21+) for backend development, as well as a strong knowledge of microservices architecture and RESTful API design. - Familiarity with API Gateway platforms such as WSO2 or similar.
Knowledge of API integration for interaction on the React app
Knowledge of API integration for interaction on the React app
Data exchange and processing tools (ETL, ESB, API)
Data exchange and processing tools (ETL, ESB, API)
PREMIUM
• Experience deploying data/API services and microservice architectures
• Experience deploying data/API services and microservice architectures
PREMIUM
Design and implement integrations using D365 APIs, including Data Management Package REST API and OData. - Proficiency in tools such as Postman, Azure Logic Apps, and scripting languages (e.g., C#, PowerShell) for API orchestration and ETL processes.
Design and implement integrations using D365 APIs, including Data Management Package REST API and OData. - Proficiency in tools such as Postman, Azure Logic Apps, and scripting languages (e.g., C#, PowerShell) for API orchestration and ETL processes.
Strong exposure to AWS (Lambda, S3, EKS, SNS, API Gateway)
Strong exposure to AWS (Lambda, S3, EKS, SNS, API Gateway)
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API calls, metadata and orchestrating principles
API calls, metadata and orchestrating principles
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Experience with AWS, Kubernetes, Service Mesh, and API Security (including authentication and authorization).
Experience with AWS, Kubernetes, Service Mesh, and API Security (including authentication and authorization).
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Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
Experience with AWS, Kubernetes, Service Mesh, API gateways, and API Security (authentication and authorization).
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Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. Its how weve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services and our open-access model we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.LSEG is headquartered in the United Kingdom, with significant ...
LSEG (London Stock Exchange Group) is more than a diversified global financial markets infrastructure and data business. We are dedicated, open-access partners with a dedication to excellence in delivering the services our customers expect from us. With extensive experience, deep knowledge and worldwide presence across financial markets, we enable businesses and economies around the world to fund innovation, manage risk and create jobs. Its how weve contributed to supporting the financial stability and growth of communities and economies globally for more than 300 years. Through a comprehensive suite of trusted financial market infrastructure services and our open-access model we provide the flexibility, stability and trust that enable our customers to pursue their ambitions with confidence and clarity.LSEG is headquartered in the United Kingdom, with significant ...
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Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
Extensive Salesforce development experience (including Apex triggers, classes, asynchronous Apex, API Integrations, Platform Events, LWCs and Sites)
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Investigate and resolve production issues promptly from user interface (UI) through to application logic (API & database) and infrastructure
Investigate and resolve production issues promptly from user interface (UI) through to application logic (API & database) and infrastructure
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