Date posted
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Type of Company
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Locations
Locations
Salaries
Date posted
Type of Company
Job types
Locations
34 Contract API jobs in Addlestone + 20 miles
309 exact matches jobs are outside your preferred location
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API integrations with complex systems
API integrations with complex systems
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RESTful API development experience.
RESTful API development experience.
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Integrate M365 using Graph API, EWS, SOAP, and REST. * Hands-on with Microsoft Graph API, EWS, SOAP, and REST for M365 integration.
Integrate M365 using Graph API, EWS, SOAP, and REST. * Hands-on with Microsoft Graph API, EWS, SOAP, and REST for M365 integration.
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Develop, deploy, and monitor cloud solutions using AWS (Lambda, API Gateway, CloudWatch, ECS, ECR, DynamoDB, S3) * Strong grasp of distributed systems, API security (OAuth, API keys, JWT), and Apigee/APIM platforms
Develop, deploy, and monitor cloud solutions using AWS (Lambda, API Gateway, CloudWatch, ECS, ECR, DynamoDB, S3) * Strong grasp of distributed systems, API security (OAuth, API keys, JWT), and Apigee/APIM platforms
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Experience testing interfaces (inbound/outbound), including file-based and API integrations.
Experience testing interfaces (inbound/outbound), including file-based and API integrations.
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Senior Test Analyst - Collateral Management, Algo
Senior Test Analyst - Collateral Management, Algo
Harvey Nash
City of London, London
£600 - £640 per day
Experience testing interfaces (inbound/outbound), including file-based and API integrations.
Experience testing interfaces (inbound/outbound), including file-based and API integrations.
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Strong understanding of API integration and data flow between backend and frontend.
Strong understanding of API integration and data flow between backend and frontend.
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Deep understanding of RESTful API design and integration
Deep understanding of RESTful API design and integration
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Microsoft Power Platform / Agentic AI Engineer
Microsoft Power Platform / Agentic AI Engineer
cer Financial
EC2M, City of London
£705 per day £705 per day (via Umbrella)
Microsoft 365 & Graph API Integration * Proficiency in Microsoft Graph API, Azure OpenAI, and Semantic Kernel
Microsoft 365 & Graph API Integration * Proficiency in Microsoft Graph API, Azure OpenAI, and Semantic Kernel
FEATURED
Understanding of API authentication, rate limits, and error handling.
Understanding of API authentication, rate limits, and error handling.
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Knowledge of Microsoft Graph API, Azure AI Foundry, and Copilot integration is a strong plus.
Knowledge of Microsoft Graph API, Azure AI Foundry, and Copilot integration is a strong plus.
Strong background in software architecture, microservices, and API design.
Strong background in software architecture, microservices, and API design.
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Strong application security background (OWASP Top 10, API security).
Strong application security background (OWASP Top 10, API security).
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Experience in API and BDD testing
Experience in API and BDD testing
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
NEWEQUALITY BOOST
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Experience creating RESTful APIs and ensuring API extensibility
Experience creating RESTful APIs and ensuring API extensibility
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
PREMIUM
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API analysis and design
API analysis and design
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Senior Backend Engineer (Platform & Security)
Senior Backend Engineer (Platform & Security)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
Strong understanding of distributed systems, microservices architecture, and API design.
Strong understanding of distributed systems, microservices architecture, and API design.
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Fullstack with C# Dot net HTML Web Software Developer
Fullstack with C# Dot net HTML Web Software Developer
Nexus Jobs
RM12, Hornchurch
From £50,000 to £70,000 per annum
Our Client is leader in the development of software for the financial sector. We are looking for a creative, detail-orientated Web Developer to join our Web Development team. You must have at least 5 years experience of working as a Fullstack Web Software Developer with C# Dot Net HTML and CSS. Within the Web Development team, you will have the opportunity to enjoy working with a range of web technology across the full stack. Our client base is growing and as part of this growth we are looking to improve and enhance our web-oriented product offerings. We are looking to recruit highly motivated and creative web developers who can be instrumental in delivering an ambitious digital roadmap. Ideally, we are looking for Web Developers with five plus years work experience. Additionally, candidates should be experienced in debugging and profiling applications associated with
Our Client is leader in the development of software for the financial sector. We are looking for a creative, detail-orientated Web Developer to join our Web Development team. You must have at least 5 years experience of working as a Fullstack Web Software Developer with C# Dot Net HTML and CSS. Within the Web Development team, you will have the opportunity to enjoy working with a range of web technology across the full stack. Our client base is growing and as part of this growth we are looking to improve and enhance our web-oriented product offerings. We are looking to recruit highly motivated and creative web developers who can be instrumental in delivering an ambitious digital roadmap. Ideally, we are looking for Web Developers with five plus years work experience. Additionally, candidates should be experienced in debugging and profiling applications associated with
Senior Android Engineer (Native Integration & Security)
Senior Android Engineer (Native Integration & Security)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
Build a robust, efficient, and scalable client-side API integration layer to consume real-time security signals (like our proprietary Scam_Score) from the AI Core. Partner with the Senior Backend Engineer (Application & AI Orchestration) to define the API contracts and real-time data flow needed to power the Security Shield.
Build a robust, efficient, and scalable client-side API integration layer to consume real-time security signals (like our proprietary Scam_Score) from the AI Core. Partner with the Senior Backend Engineer (Application & AI Orchestration) to define the API contracts and real-time data flow needed to power the Security Shield.
Senior Android Engineer (UI/UX & Welcome Manager)
Senior Android Engineer (UI/UX & Welcome Manager)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
API & Backend Integration: Partner with our backend (Application & AI Orchestration) engineers to define and integrate the client-side APIs and data models required to power the Welcome Manager's features, from live transcription to post-call entity-extracted summaries.
API & Backend Integration: Partner with our backend (Application & AI Orchestration) engineers to define and integrate the client-side APIs and data models required to power the Welcome Manager's features, from live transcription to post-call entity-extracted summaries.
Senior Backend Engineer (Application & AI Orchestration)
Senior Backend Engineer (Application & AI Orchestration)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
API & Application Development? Partner closely with the Senior Android Engineers to define robust API contracts and ensure a seamless, low-latency experience for the live transcript and mid-call intervention features.
API & Application Development? Partner closely with the Senior Android Engineers to define robust API contracts and ensure a seamless, low-latency experience for the live transcript and mid-call intervention features.
Senior Backend Engineer (Telco Integration Lead)
Senior Backend Engineer (Telco Integration Lead)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
We are seeking a foundational engineer to own our single greatest strategic asset: our unique, privileged access to network-level intelligence via the GSMA CAMARA API standard. Own and build the Security Signal Ingestion path, the secure, low-latency, and out-of-band data channel connecting to our founding members' network API gateways. Ensure all network API integrations meet the stringent P99 latency budgets (e.g., < 150ms) required to support our sub-500ms Time-to-Trust product goal. Collaborate with the platform team to build a parallel development path using mocked data to mitigate risks of network API delays. Deep understanding of API design (REST, gRPC, Webhooks) and API security (OAuth 2.0, mTLS, JWTs).
We are seeking a foundational engineer to own our single greatest strategic asset: our unique, privileged access to network-level intelligence via the GSMA CAMARA API standard. Own and build the Security Signal Ingestion path, the secure, low-latency, and out-of-band data channel connecting to our founding members' network API gateways. Ensure all network API integrations meet the stringent P99 latency budgets (e.g., < 150ms) required to support our sub-500ms Time-to-Trust product goal. Collaborate with the platform team to build a parallel development path using mocked data to mitigate risks of network API delays. Deep understanding of API design (REST, gRPC, Webhooks) and API security (OAuth 2.0, mTLS, JWTs).
Experience creating RESTful APIs and ensuring API extensibility.
Experience creating RESTful APIs and ensuring API extensibility.
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