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4 Contract API jobs in Berkhamsted + 20 miles
468 exact matches jobs are outside your preferred location
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Anypoint API Manager
Anypoint API Manager
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Microsoft Graph API understanding for advanced integrations * Experience with SharePoint REST API and modern development practices
Microsoft Graph API understanding for advanced integrations * Experience with SharePoint REST API and modern development practices
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Strong experience with RESTful API integrations * Familiarity with authentication protocols (OAuth2, API keys)
Strong experience with RESTful API integrations * Familiarity with authentication protocols (OAuth2, API keys)
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Senior EUC Mac Support Engineer - Active SC required
Senior EUC Mac Support Engineer - Active SC required
Skillsbay Limited
SW1A, South West London
£350 per day inside IR35
API integration experience.
API integration experience.
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The Azure DevOps Engineer will design, build, and maintain CI/CD pipelines to support the API backbone and other digital initiatives. * Contribute to the ongoing development of a scalable, resilient digital API infrastructure. * Familiarity with API-driven architectures, microservices, and integration patterns.
The Azure DevOps Engineer will design, build, and maintain CI/CD pipelines to support the API backbone and other digital initiatives. * Contribute to the ongoing development of a scalable, resilient digital API infrastructure. * Familiarity with API-driven architectures, microservices, and integration patterns.
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This role involves architecting cloud-native solutions using Azure Cosmos DB (SQL API and Mongo API), implementing effective partitioning strategies, indexing, and consistency models to support real-time financial data processing. * Architect and develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
This role involves architecting cloud-native solutions using Azure Cosmos DB (SQL API and Mongo API), implementing effective partitioning strategies, indexing, and consistency models to support real-time financial data processing. * Architect and develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
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Maintain and troubleshoot the custom C# .NET backend API used as a wrapper for Contentful CMS. * API Gateway * Solid expertise in C# .NET, particularly in API development and integration. * Familiarity with Contentful CMS and API integration.
Maintain and troubleshoot the custom C# .NET backend API used as a wrapper for Contentful CMS. * API Gateway * Solid expertise in C# .NET, particularly in API development and integration. * Familiarity with Contentful CMS and API integration.
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Strong application security knowledge (OWASP Top 10, API security).
Strong application security knowledge (OWASP Top 10, API security).
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Strong application security knowledge (OWASP Top 10, API security).
Strong application security knowledge (OWASP Top 10, API security).
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Automation Developer - Ansible / Python - Configuration Management
Automation Developer - Ansible / Python - Configuration Management
Essential Consulting
EC1, City of London
Unspecified Competitive Daily Rate (inside IR35)
REST API integration: experience designing and consuming APIs for automation.
REST API integration: experience designing and consuming APIs for automation.
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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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Automation Engineer - GOlang - Contract
Automation Engineer - GOlang - Contract
WWT EMEA UK LIMITED
EC1Y, City of London
From £550 to £600 per day Inside IR35
Experience in the consumption of of Restful APIs, API Gateway integrations and relevant API Specifications for creation, deletion and update of desired API endpoints.
Experience in the consumption of of Restful APIs, API Gateway integrations and relevant API Specifications for creation, deletion and update of desired API endpoints.
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Senior Infrastructure Operations Engineer - SC Cleared
Senior Infrastructure Operations Engineer - SC Cleared
Certes IT Service Solutions
London
£540 - £550 per day + Negotiable
Integration: Experience with Graph API, Logic Apps, and automation runbooks for cross-platform orchestration.
Integration: Experience with Graph API, Logic Apps, and automation runbooks for cross-platform orchestration.
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Role Title: Banking Solution Architect - Location: Knutsford or Northampton - Duration: Until 31/12/2025 - Day Rate: £467.50 Inside IR35 - We are seeking an experienced Solution Architect to provide technical leadership across core banking programmes, focusing on current account journeys, including loans, account switching, and related operational platforms. The successful candidate will be responsible for designing, developing, and implementing scalable, resilient, and secure technology solutions to address complex business challenges within the banking landscape. This role requires close collaboration with stakeholders across business and technology functions, ownership of architectural delivery, and guidance on integration strategies, balancing cloud adoption, automation, and regulatory compliance. Lead the design and technical architecture for current accounts, lo
Role Title: Banking Solution Architect - Location: Knutsford or Northampton - Duration: Until 31/12/2025 - Day Rate: £467.50 Inside IR35 - We are seeking an experienced Solution Architect to provide technical leadership across core banking programmes, focusing on current account journeys, including loans, account switching, and related operational platforms. The successful candidate will be responsible for designing, developing, and implementing scalable, resilient, and secure technology solutions to address complex business challenges within the banking landscape. This role requires close collaboration with stakeholders across business and technology functions, ownership of architectural delivery, and guidance on integration strategies, balancing cloud adoption, automation, and regulatory compliance. Lead the design and technical architecture for current accounts, lo
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Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
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Full Stack Integration Developer - Azure, .NET, NextJS
Full Stack Integration Developer - Azure, .NET, NextJS
Pioneer Search
City of London, London
£600 - £650 per day
A leading technical consultancy is seeking a Full Stack Integration Developer for an Outside IR35 contract. This hybrid role (London-based) offers and requires SC Clearance. You'll play a key role in a large-scale digitisation program, developing and integrating modern web applications within an Azure ecosystem. While primarily hands-on, you'll also contribute to architectural design and strategy. * Application Development: Build and maintain scalable web applications using .NET (C#, ASP.NET Core) and Azure Functions. * Front-End Development: Develop modern UIs using NextJS and other JavaScript frameworks. * Integration & Backend: Work with Azure Service Bus, Event Grid, and Static Web Apps. Design and optimize SQL Server databases, stored procedures, and APIs. * DevOps & Infrastructure: Create and manage CI/CD pipelines using Azure DevOps, GitHub Actions, or Jenkins.
A leading technical consultancy is seeking a Full Stack Integration Developer for an Outside IR35 contract. This hybrid role (London-based) offers and requires SC Clearance. You'll play a key role in a large-scale digitisation program, developing and integrating modern web applications within an Azure ecosystem. While primarily hands-on, you'll also contribute to architectural design and strategy. * Application Development: Build and maintain scalable web applications using .NET (C#, ASP.NET Core) and Azure Functions. * Front-End Development: Develop modern UIs using NextJS and other JavaScript frameworks. * Integration & Backend: Work with Azure Service Bus, Event Grid, and Static Web Apps. Design and optimize SQL Server databases, stored procedures, and APIs. * DevOps & Infrastructure: Create and manage CI/CD pipelines using Azure DevOps, GitHub Actions, or Jenkins.
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Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
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Up to £640 per day (Inside IR35) London / Remote - 6 months - My client is an instantly recognisable consultancy who urgently requires a Lead Full Stack Developer to join a business-critical programme. * Proven experience working as a Lead Java Developer within the public sector * Active Security Clearance (SC) * Java (8/11/17+): Expert-level programming and deep understanding of the language and its core libraries * Spring Boot: Expert in building RESTful APIs and microservices * AWS: Strong experience with core AWS services (EC2, S3, Lambda, IAM, etc.) * Kafka / Messaging Systems: Expertise in building event-driven architectures * SQL: Strong experience with relational databases and query optimization * REST / JSON APIs: Designing, developing, and consuming scalable APIs * Docker: Proficiency in containerizing applications for local and cloud environments
Up to £640 per day (Inside IR35) London / Remote - 6 months - My client is an instantly recognisable consultancy who urgently requires a Lead Full Stack Developer to join a business-critical programme. * Proven experience working as a Lead Java Developer within the public sector * Active Security Clearance (SC) * Java (8/11/17+): Expert-level programming and deep understanding of the language and its core libraries * Spring Boot: Expert in building RESTful APIs and microservices * AWS: Strong experience with core AWS services (EC2, S3, Lambda, IAM, etc.) * Kafka / Messaging Systems: Expertise in building event-driven architectures * SQL: Strong experience with relational databases and query optimization * REST / JSON APIs: Designing, developing, and consuming scalable APIs * Docker: Proficiency in containerizing applications for local and cloud environments
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Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
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Contract Back-End Java Engineer Remote up to £650 per day - 12-month contract (with potential extension) Are you an experienced Back-End Java Engineer with proven experience in the gambling industry? This is a fantastic opportunity to work on large-scale, high-traffic platforms for a well-known operator, delivering critical back-end services in a modern, distributed environment. This is a fully remote contract (UKbased), initially for 12 months with strong potential to extend. Key Requirements * You have strong commercial experience with Java and frameworks such as Spring/Spring Boot. * You bring solid cloud experience (preferably AWS) and are confident working with Kubernetes and Docker. * Youre skilled with messaging systems and APIs (Kafka, ActiveMQ, JMS, REST, CometD). * You have hands-on experience with databases (DB2, MongoDB, MySQL). * You understand caching te
Contract Back-End Java Engineer Remote up to £650 per day - 12-month contract (with potential extension) Are you an experienced Back-End Java Engineer with proven experience in the gambling industry? This is a fantastic opportunity to work on large-scale, high-traffic platforms for a well-known operator, delivering critical back-end services in a modern, distributed environment. This is a fully remote contract (UKbased), initially for 12 months with strong potential to extend. Key Requirements * You have strong commercial experience with Java and frameworks such as Spring/Spring Boot. * You bring solid cloud experience (preferably AWS) and are confident working with Kubernetes and Docker. * Youre skilled with messaging systems and APIs (Kafka, ActiveMQ, JMS, REST, CometD). * You have hands-on experience with databases (DB2, MongoDB, MySQL). * You understand caching te
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AI Platform Operations Manager
AI Platform Operations Manager
Networking People (UK) Limited
London
£550 - £600 per day + Outside of IR35
Contract: AI Platform Operations Manager - Duration: 6 Months - Start Date: ASAP - Location: Remote with travel to multiple sites - Rate: Negotiable - Support Engineer / Cluster Administrator to provide Level 1 and Level 2 support for AI platform. This role will be customer facing, involve technical troubleshooting, and collaboration with vendor engineering teams to ensure seamless AI platform operations. Key Responsibilities * L1 support for customer-reported issues and requests * L2 support by diagnosing, replicating, and troubleshooting issues across platform and infrastructure. * Coordinate resolution of complex issues (L3) to (vendor) product/engineering teams and manage vendor responses * Monitor system health, alerts, and customer usage patterns * Document solutions/workarounds, create and maintain knowledge, document support procedures * Automate common tasks
Contract: AI Platform Operations Manager - Duration: 6 Months - Start Date: ASAP - Location: Remote with travel to multiple sites - Rate: Negotiable - Support Engineer / Cluster Administrator to provide Level 1 and Level 2 support for AI platform. This role will be customer facing, involve technical troubleshooting, and collaboration with vendor engineering teams to ensure seamless AI platform operations. Key Responsibilities * L1 support for customer-reported issues and requests * L2 support by diagnosing, replicating, and troubleshooting issues across platform and infrastructure. * Coordinate resolution of complex issues (L3) to (vendor) product/engineering teams and manage vendor responses * Monitor system health, alerts, and customer usage patterns * Document solutions/workarounds, create and maintain knowledge, document support procedures * Automate common tasks
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Front End Developer
Front End Developer
Sanderson Government and Defence
EC1, City of London
£400 - £500 per day + outside IR35
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
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We are urgently seeking a highly skilledSenior MLOps Engineer with strong Data Science experiencefor a key role with a leading global technology consultancy at their London office. This is a fantastic opportunity to bridge the gap between cutting-edge AI/ML research and scalable, production-ready solutions. In this role, you will be the crucial link between Data Science and DevOps teams, focusing on deploying, managing, and automating the full machine learning lifecycle using a modern AWS stack. * Act as the technical liaison between Data Science and DevOps, ensuring smooth deployment and integration of AI/ML models. * Design, develop, and deploy microservices and standalone applications to serve models, including those from Hugging Face. * Build, train, and evaluate ML models usingAWS SageMaker, Bedrock, Glue, and Fargate.
We are urgently seeking a highly skilledSenior MLOps Engineer with strong Data Science experiencefor a key role with a leading global technology consultancy at their London office. This is a fantastic opportunity to bridge the gap between cutting-edge AI/ML research and scalable, production-ready solutions. In this role, you will be the crucial link between Data Science and DevOps teams, focusing on deploying, managing, and automating the full machine learning lifecycle using a modern AWS stack. * Act as the technical liaison between Data Science and DevOps, ensuring smooth deployment and integration of AI/ML models. * Design, develop, and deploy microservices and standalone applications to serve models, including those from Hugging Face. * Build, train, and evaluate ML models usingAWS SageMaker, Bedrock, Glue, and Fargate.
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Google SecOps Engineer (SOAR/UEBA) - Outside IR35
Google SecOps Engineer (SOAR/UEBA) - Outside IR35
SF Recruitment (Tech)
Waterloo, SE1
£500 - 700 per day
I am currently assisting a client who operate in a regulated industry, financial services, who are currently embarking a programme of work focused on maturity/designing and implementing security posture utilising SIEM tools such as Google Chronicle & implementing UEBA/SOAR (Security Orchestration, Automation, and Response / User and Entity Behaviour Analytics) built on GCP/Google Cloud so Google SecOps/Security Operations experience is highly desirable. Key Responsibilities; - Enable and validate UEBA alerting within Chronicle SIEM, based on log sources - Deliver a minimum viable UEBA capability with tested detection logic - Provide engineering support to accelerate onboarding of log sources required for UEBA enrichment and detection fidelity - Conduct current state assessment of detection engineering capabilities and log source coverage
I am currently assisting a client who operate in a regulated industry, financial services, who are currently embarking a programme of work focused on maturity/designing and implementing security posture utilising SIEM tools such as Google Chronicle & implementing UEBA/SOAR (Security Orchestration, Automation, and Response / User and Entity Behaviour Analytics) built on GCP/Google Cloud so Google SecOps/Security Operations experience is highly desirable. Key Responsibilities; - Enable and validate UEBA alerting within Chronicle SIEM, based on log sources - Deliver a minimum viable UEBA capability with tested detection logic - Provide engineering support to accelerate onboarding of log sources required for UEBA enrichment and detection fidelity - Conduct current state assessment of detection engineering capabilities and log source coverage
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Locations
- Southwark
- The City, City (EC4)
- Chiswick
- Frimley
- Greenwich
- Holborn
- Mayfair
- Osterley
- Upton Lea
- Waterloo
- City of London
- Oxford
- Reading
- South East London
- Basingstoke
- Cambridge
- Central London
- West End
- Abingdon
- Camberley
- London
- Oxfordshire
- Berkshire
- Cambridgeshire
- Hampshire
- Surrey
- Northamptonshire
- Hertfordshire
- Buckinghamshire
- Kent
- South East
- East Anglia
- East Midlands
- Midlands