24 of 24 Contract API Integration Jobs in England

their team on a hybrid/remote contract basis . This is an excellent opportunity to work outside IR35 , contributing to an exciting project with a strong focus on API integration and Azure cloud services . What You'll Be Doing: Designing, building, and maintaining scalable APIs using C#/.NET Integrating third-party APIs into enterprise-level … developers, architects, and stakeholders Writing clean, maintainable, and well-documented code What We're Looking For: Strong experience in C#/.NET (Core or Framework) Proven track record of API integration (RESTful APIs, Webhooks, etc.) Familiarity with CI/CD pipelines and DevOps practices on Azure Experience working in Agile/Scrum teams Excellent problem-solving and communication … skills Bonus Skills (Nice to Have): Knowledge of Azure API Management Experience with containerisation (Docker, Kubernetes) Familiarity with message-based architectures (e.g., Azure Service Bus) Contract Details: Outside IR35 Hybrid/remote (UK-based Candidates) Initial 3-6 month contract with potential of extension Please send an up to date CV for an immediate response and more information on More ❯

Halian Technology are searching for an Interim API Integrations Specialist to join our client's forward-thinking technology team. Our client is a dynamic and rapidly growing energy supplier based in Oxfordshire, committed to driving business success through smart, reliable energy solutions. Our client challenges the existing marketplace with a tech-driven, customer-focused approach and foster a culture … delivering high-quality solutions, and want to work in a company where your expertise is valued and supportedthis is the role for you. Key Responsibilities: Design, develop, and maintain API integrations between internal systems and external SaaS platforms. Collaborate with product, data, and engineering teams to identify integration requirements and deliver robust solutions. Monitor and troubleshoot integration workflows, ensuring data consistency across platforms. Translate business requirements into technical specifications for system connectivity. Build and maintain API documentation, providing guidance on integration best practices. Ensure all integrations meet compliance, security, and performance standards. Work closely with SaaS vendors and partners to coordinate technical efforts. Key Requirements: Essential: Strong expertise in digital engineering, CMS design and More ❯

The Solutions Architect should have solid knowledge and experience in the disciplines involved in full lifecycle software and systems Engineering. In particular, you should have good experience in systems integration, with a strong emphasis on software-led integration, API design and implementation, and secure interoperability, alongside basic networking skills. What you will do: The Solutions Architect will … more areas below will be advantageous: • Defining and maintenance of architectural principles, patterns and frameworks • Ensuring adherence to technical and security standards and identifying corrective action • Advanced software architecture, API integration, and design for scalability • Leadership in software-led systems integration, including cross-domain interoperability • Formal methods for analysis and design • Dynamically scaled containerisation such as those More ❯

application development. • Unit with React Testing Library/Jest and E2E test automation with Cypress • Industry standard CI/CD Orchestration Tools (GitHub Actions and Docker) • knowledge of Docker, API microservices, API integration with SAP • A detailed and working knowledge of AWS services Candidates who are currently an Application Developer, Software Engineer, Software Developer, Web Developer, Application More ❯

application development. • Unit with React Testing Library/Jest and E2E test automation with Cypress • Industry standard CI/CD Orchestration Tools (GitHub Actions and Docker) • knowledge of Docker, API microservices, API integration with SAP • A detailed and working knowledge of AWS services Candidates who are currently an Application Developer, Software Engineer, Software Developer, Web Developer, Application More ❯

Build and enhance responsive user interfaces using React and TailwindCSS . Contribute to key modules including: Client & Supplier Onboarding Flows Waste Reporting Module Scheduler for Recurring Events Customer Portal API Integration Rebate Management System Ensure seamless data integration between services via secure REST APIs. Deploy, test, and optimise services within the AWS environment. The Full-Stack Developer More ❯

Build and enhance responsive user interfaces using React and TailwindCSS . Contribute to key modules including: Client & Supplier Onboarding Flows Waste Reporting Module Scheduler for Recurring Events Customer Portal API Integration Rebate Management System Ensure seamless data integration between services via secure REST APIs. Deploy, test, and optimise services within the AWS environment. The Full-Stack Developer More ❯

Build and enhance responsive user interfaces using React and TailwindCSS . Contribute to key modules including: Client & Supplier Onboarding Flows Waste Reporting Module Scheduler for Recurring Events Customer Portal API Integration Rebate Management System Ensure seamless data integration between services via secure REST APIs. Deploy, test, and optimise services within the AWS environment. The Full-Stack Developer More ❯

or business events. Create Power Apps frontends integrated with GenAI services and enterprise data. Build and manage custom connectors to internal APIs and third-party services. Microsoft 365 & Graph API Integration Enable agents to access and reason over content in: SharePoint, OneDrive, Teams, Outlook, and Planner Architect multi-step agent workflows using: Semantic Kernel SDK (C# or Python … GPT-4, function calling, chat completion) Planner and Kernel Memory APIs for reasoning and memory RAG pipelines grounded in enterprise data via Azure AI Search Enterprise Data & AI Services Integration: Azure AI Search (vector indexing, hybrid search) Azure Form Recognizer for document understanding Azure Language Services for summarization, translation, and NER Deploy solutions using: Azure Kubernetes Service (AKS) or … access control The successful Microsoft Power Platform/Agentic AI Engineer will have experience in: Copilot Studio, Power Automate, Power Apps, custom connectors SharePoint Development Proficiency in Microsoft Graph API, Azure OpenAI, and Semantic Kernel Solid programming skills in Python and/or C# LangChain, AutoGen, or similar orchestration frameworks Azure AI Search, Form Recognizer, and Language Services GitHub More ❯

They're looking for a Backend Software Engineer to help design and develop backend systems supporting large-scale LLM and GenAI workloads. The role will focus on backend architecture, API integration, and automation across data and compute pipelines. What you'll be doing: Build and maintain Python backend systems for GenAI evaluation Integrate LLM components with data and … FastAPI, Cloud (GCP/AWS), CI/CD, Git/GitHub, automated testing, DevOps fundamentals Ideal for: Engineers with a strong backend foundation and hands-on GenAI or LLM integration experience looking to contribute to applied AI in healthcare. More ❯

The Role You’ll be working on a bespoke claims management platform that supports everything from claim validation to property surveying and repair coordination. The role involves backend development, API integration, and contributing to multiple internal tools and products.You’ll join a collaborative team of developers with a strong peer-review culture. There are no dedicated testers, so More ❯

Rate: £350-450 p/day Start: ASAP Key Skills: Strong commercial experience with React and TypeScript . Experience deploying and managing applications in AWS . Strong understanding of API integration and data flow between backend and frontend. Solid grasp of SQL and data handling within the UI. Experience with testing frameworks (Jest, Cypress, React Testing Library). More ❯

for advertising product issues, implementations, and escalations Build expertise across performance marketing products, web integrations, and analytics tools Troubleshoot and resolve client issues related to pixels, catalogs, delivery, and API integrations Collaborate with product and engineering teams to escalate bugs and track resolution Translate complex technical concepts into clear, actionable guidance for non-technical stakeholders Help improve internal tools More ❯

hallucination, bias, tone, etc.). Familiarity with tools like Trulens, HumanLoop, PromptLayer, or similar; experience designing QA approaches for GenAI environments. Knowledge of modern AI architectures (RAG pipelines, embeddings, API integrations such as OpenAI, Azure OpenAI, Anthropic). Experience designing and implementing structured test regimes in fast-evolving contexts. Excellent communication and facilitation skills, engaging both technical and business More ❯

expertise in Dynatrace (SaaS & On-Premises) including: Application Performance Monitoring Anomaly Detection Profiles Alerting Rules & Profiles Synthetic & Log Monitoring Real User Monitoring (RUM) DQL & Grail for advanced data analytics API integrations with complex systems Experience working in resilience/observability engineering. Strong communication skills and ability to work in high-pressure environments. Flexible, pragmatic, and delivery-focused with a More ❯

Robert Half Technology are currently recruiting for a 3 month Contract Integration Analyst/Developer for a fantastic manufacturing business in the South West. Occasional travel to the office in the South West - full time - 3 month contract. Have you streamlined systems, improve data flow, or enhance your digital infrastructure? We are looking for someone immediately available with a … strong track record of delivering robust, scalable, and secure integration solutions across diverse platforms. With hands-on experience in: API development & integration (REST, SOAP) Middleware platforms (MuleSoft, Dell Boomi, Azure Logic Apps) Data transformation & ETL pipelines Cloud and on-premise system integration If you have technical expertise and the strategic mindset then please apply or send More ❯

Key skills/experience required: Expertise in Jira configuration workflows, permissions, dashboards, filters, automation, and notification schemes# Experience implementing Jira (ideally for engineering or construction organisations) Working knowledge of API integrations and connectors with productivity and design tools (e.g. Teams, Slack, Autodesk, SharePoint) Proven ability to translate complex project processes (design reviews, change control, construction status) into logical digital More ❯

Key skills/experience required: Expertise in Jira configuration — workflows, permissions, dashboards, filters, automation, and notification schemes# Experience implementing Jira (ideally for engineering or construction organisations) Working knowledge of API integrations and connectors with productivity and design tools (e.g. Teams, Slack, Autodesk, SharePoint) Proven ability to translate complex project processes (design reviews, change control, construction status) into logical digital More ❯

60+ programme Experience: 4+ years Essential Skills Technical: Strong Python development (primary focus), Ruby experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence to technical standards Approach: Pride in writing high-quality, well-documented code Ownership of the full development process Collaborative working More ❯

60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary focus), Python experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence to technical standards Approach: Pride in producing high-quality, well-documented code Ownership of the full development process Collaborative working More ❯

60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary focus), Python experience desirable Experience across multiple services, particularly data services Docker, Kubernetes, Git/version control API development and integration Agile working practices and adherence to technical standards Approach: Pride in producing high-quality, well-documented code Ownership of the full development process Collaborative working More ❯

new SmartStream Algo system, ensuring data integrity and functional accuracy. Collaborate with business analysts, developers, and project managers to understand requirements and translate them into test scenarios. Perform system integration testing (SIT) and support user acceptance testing (UAT) phases. Identify, document, and track defects using standard defect management tools. Participate in test reviews, walkthroughs, and sign-off processes. Ensure … updates and contribute to test reporting and metrics. Required Skills & Experience: Technical & Testing Expertise: Proven experience as a System Test Analyst or similar role in complex system upgrade or integration projects. Strong knowledge of system testing methodologies, tools, and best practices. Experience testing interfaces (inbound/outbound), including file-based and API integrations. Familiarity with test management tools More ❯

new SmartStream Algo system, ensuring data integrity and functional accuracy. Collaborate with business analysts, developers, and project managers to understand requirements and translate them into test scenarios. Perform system integration testing (SIT) and support user acceptance testing (UAT) phases. Identify, document, and track defects using standard defect management tools. Participate in test reviews, walkthroughs, and sign-off processes. Ensure … updates and contribute to test reporting and metrics. Required Skills & Experience: Technical & Testing Expertise: Proven experience as a System Test Analyst or similar role in complex system upgrade or integration projects. Strong knowledge of system testing methodologies, tools, and best practices. Experience testing interfaces (inbound/outbound), including file-based and API integrations. Familiarity with test management tools More ❯

join a strategic system upgrade programme within a leading financial services organisation. This role focuses on upgrading the Algo Collateral Management System, ensuring robust interface validation and seamless system integration across key business and technology functions. Role & Responsibilities: Develop and execute detailed test plans, cases, and scripts for the system upgrade. Validate inbound and outbound interfaces, ensuring data integrity … and functional accuracy. Collaborate with business analysts, developers, and project managers to define and test requirements. Conduct System Integration Testing (SIT) and support User Acceptance Testing (UAT). Identify, document, and manage defects using tools such as JIRA. Ensure compliance with internal QA standards and contribute to test reporting and sign-off. Essential Skills & Requirements: Proven experience as a … System or Senior Test Analyst on complex system upgrade or integration projects. Strong knowledge of system testing methodologies and tools. Experience testing interfaces (file-based and API integrations). Proficiency with SQL for data validation and backend testing. Solid understanding of collateral management, settlements, or post-trade processing within financial services. Prior experience with SmartStream or Algo Collateral More ❯