24 of 24 Contract API Integration Jobs in the UK excluding London

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 ❯

for: The SDA should have solid knowledge and experience in the disciplines involved in full lifecycle software and systems Engineering. In particular, they 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. The successful candidate will have an outstanding range … 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 ❯

including design reviews, verification, and qualification activities, will also lie with the Client. Ensuring adherence to technical and security standards and identifying corrective action Leadership in software-led systems integration, including cross-domain interoperability Dynamically scaled containerisation such as those managed by Kubernetes Architectures for sharing databases between processes & locking strategies Linux platforms such as RHEL and/or … Systems IT Networking Secure by Design principles Formal methods for analysis and design System Administrator experience including patch management, monitoring e.g. SCOM, mitigating security vulnerabilities. Proven track record in API design, integration and interoperability between complex systems Design and implementation of CI/CD pipelines, with embedded DevSecOps practices Advanced software architecture, API integration, and design … for scalability Able to demonstrate experience in all areas of the software lifecycle from requirements definition through to integration and delivery Experience in the use of NVIDIA for image processing Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist More ❯

including design reviews, verification, and qualification activities, will also lie with the Client. Ensuring adherence to technical and security standards and identifying corrective action Leadership in software-led systems integration, including cross-domain interoperability Dynamically scaled containerisation such as those managed by Kubernetes Architectures for sharing databases between processes & locking strategies Linux platforms such as RHEL and/or … Systems IT Networking Secure by Design principles Formal methods for analysis and design System Administrator experience including patch management, monitoring e.g. SCOM, mitigating security vulnerabilities. Proven track record in API design, integration and interoperability between complex systems Design and implementation of CI/CD pipelines, with embedded DevSecOps practices Advanced software architecture, API integration, and design … for scalability Able to demonstrate experience in all areas of the software lifecycle from requirements definition through to integration and delivery Experience in the use of NVIDIA for image processing Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist More ❯

including design reviews, verification, and qualification activities, will also lie with the Client. Ensuring adherence to technical and security standards and identifying corrective action Leadership in software-led systems integration, including cross-domain interoperability Dynamically scaled containerisation such as those managed by Kubernetes Architectures for sharing databases between processes & locking strategies Linux platforms such as RHEL and/or … Systems IT Networking Secure by Design principles Formal methods for analysis and design System Administrator experience including patch management, monitoring e.g. SCOM, mitigating security vulnerabilities. Proven track record in API design, integration and interoperability between complex systems Design and implementation of CI/CD pipelines, with embedded DevSecOps practices Advanced software architecture, API integration, and design … for scalability Able to demonstrate experience in all areas of the software lifecycle from requirements definition through to integration and delivery Experience in the use of NVIDIA for image processing Disclaimer: This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist More ❯

AI Integration Specialist - Level 1 Location: Ipswich (Three days onsite, two days remote) About the Role: We are seeking a talented AI Integration Specialist to help bring advanced AI capabilities into production systems and enterprise platforms. In this role, you will collaborate closely with engineers, data scientists, and product managers to design, deploy, and integrate AI-powered features … into business applications. The ideal candidate combines technical expertise in software integration with a strong understanding of AI/ML deployment workflows and API-based architectures. Key Responsibilities: Collaborate with engineering and product teams to define requirements, scope, and technical design for AI-driven features. Deploy machine learning models into production environments, ensuring scalability, performance, and reliability. Transform … ML models into APIs and integrate them into existing enterprise systems and workflows. Work with DevOps and Back End engineers to optimize model deployment pipelines and ensure smooth integration with microservices and cloud infrastructures. Monitor model performance post-deployment and assist in updates or retraining workflows. Document integration processes, APIs, and deployment architectures for cross-team knowledge sharing. More ❯

automation is scalable and resilient. Act as a technical architect on projects, advising stakeholders on Salesforce best practice and system design. Deliver and document end-to-end solution architecture , integration patterns, and technical specifications. Collaborate with cross-functional teams to ensure seamless integrations with external systems (ERP, finance, payment gateways, middleware). Conduct code reviews, troubleshoot technical issues, and … development, and Salesforce automation tools. Strong understanding of Salesforce architecture principles and ability to design scalable multi-cloud solutions. Solid background in Apex, LWC, SOQL, and REST/SOAP API integration . Experience integrating Salesforce with ERP, billing, or financial systems. Knowledge of data modelling, governance, and deployment processes (DevOps, Git, CI/CD pipelines) . Excellent stakeholder … e.g., Salesforce Revenue Cloud Consultant, Application Architect, System Architect, or Technical Architect ). Previous contract experience within telecoms, fintech, SaaS, or enterprise transformation projects . Familiarity with Middleware/Integration platforms (MuleSoft, Dell Boomi, etc.). This role is fully remote within the UK. Unfortunately, we cannot provide visa sponsorship, so applicants must have the right to work in 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 ❯

oversight across engineering disciplines being delivered by another supplier. Support the programme Chief Engineer in developing the required standards and governance for the programme Work closely with the programme integration office Chief Architect and Engineer to support the creation of standards and governance structures for the ISTAR portfolio and the programme. Support and lead the design, integration, and … and internal Defence Digital and Army teams, senior stakeholders, and external partners. Support the development of the software factory roadmap and development requirements for current and future contracts, and integration into other DD Service Executive capabilities Oversee the documentation of engineering processes, designs, and outcomes for audit and review purposes. Manage Risk by identifying and mitigating engineering risks, ensuring … applications and integrations Proficiency in cloud architectures, cybersecurity, software development methodologies, and system integration. Understanding of on-premise and deployable technologies. Deep knowledge of systems engineering, software development, hardware integration, and testing methodologies. Understanding of ISR or ISTAR capabilities advantageous Proficiency in engineering tools and technologies relevant to Defence Digital projects. Understanding of integrated sensor architecture (ISA) advantageous Deep More ❯

code and collaborating in an agile environment. What you'll be doing: Designing, coding, and delivering well-structured, performant solutions primarily in Perl Working with Oracle databases, APIs, and integration layers Supporting agile ceremonies and collaborating with cross-functional teams Producing automated unit and integration tests Building relationships with stakeholders and ensuring technical solutions meet business needs Supporting … recent experience with Perl programming (essential) Additional knowledge of JavaScript and modern frameworks is advantageous Experience with architectural design patterns Agile delivery experience Oracle database design and development expertise API integration experience Git/version control proficiency Excellent communication and collaboration skills Why join? This is an exciting chance to work for a business at the forefront of More ❯

documentation for data architecture, workflows, and processes Troubleshoot and resolve data-related issues, ensuring minimal disruption to service operations Support automation of reporting and data delivery Design and implement API integrations to integrate data . Qualifications and skills required for the Data Engineer position: Ideally degree educated in Computer Science, Data Engineering, or a related field Experience as a 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 click apply for full job details More ❯

for someone who has: A strong engineering background and possibly BI experience. Solid proficiency in SQL and Python as core programming skills. Proven experience in building data pipelines, including API integrations. Knowledge of Power BI semantic models (focused on table modelling; visualisation skills not required for the role). Familiarity or hands-on experience with Google BigQuery, GCP services More ❯

Architectural Patterns, with a focus on Clean Architecture, which is frequently used in modern Android development. oExpertise in Dependency Injection frameworks. oStrong knowledge and working experience with Retrofit for API integration. oHands-on experience with Dagger for dependency management and scalable application development. 3.Experience Requirement We are looking for an experienced Android Developer with 710 years of expertise in More ❯

product and platform. Oversee product releases and ensure features deliver on their intended outcomes. What we're looking for: A technical mindset, with experience in data-driven development and API integrations. Previous experience as a Product Owner (or similar - Business/Systems Analyst) in a consumer-facing product. Strong problem-solving skills and the ability to balance priorities in More ❯

endpoint security, Zero Trust, access control, and vulnerability management. Demonstrable experience in large-scale projects such as hardware refreshes, migrations, or UEM deployments. Current SC clearance required. Desirable skills: API integration experience. Microsoft or VMware certifications. Familiarity with ISO 27001 environments. More ❯

MVC frameworks. Solid architecture and design skills for complex, scalable applications. Expertise in relational database schema design and optimization (MySQL). Proficiency with Git workflows, LAMP stack, and REST API integrations. Strong knowledge of HTML5, CSS (specificity, inheritance, positioning), JavaScript, AJAX, and DOM manipulation. Experience with unit/functional testing and Docker containerization. Excellent problem-solving and critical thinking … abilities. Desirable Enterprise/ERP application development. Familiarity with AWS and cloud-native deployments. Experience with Continuous Integration/Continuous Deployment (CI/CD). Strong front-end skills. Why Join Us? Cutting-edge environment: Work with a seasoned PHP team using modern CI/CD practices. Collaborative culture: Friendly, knowledge-sharing environment that values new ideas and continuous 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 ❯

web portals and Back End services. The ideal candidate will have strong expertise in React.js and Node.js , and a solid understanding of microservices architecture , CI/CD pipelines , and API integrations . This role requires a developer who can work across the full stack - from user interface design to Back End microservices - while ensuring reliability, scalability, and seamless user … and Node.js with experience in full-stack web development. Hands-on experience with microservices architecture design and implementation . Proficiency in managing Jenkins CI/CD pipelines for continuous integration and delivery. Experience using Docker for containerized application deployment and Consul for service discovery/configuration. Good understanding of Linux and Windows server administration . Proficiency in RESTful API More ❯

contractor for a client that has a desire to integrate all of their APIs to move their business technology on to the next step. We are looking for an integration engineer who can help shape the future of the systems by working with providers and making sure APIs plug up to each other. This will be a 6 month … Strong documentation and communication - Ability to work with business stakeholders (e.g., Marketing, Ops) - Project management or agile familiarity - Problem-solving and debugging - Security awareness (especially around data flows and API access) - Testing and Quality Assurance Tech RESTful API design and integration Power Automate (workflow automation) Power Apps (low-code app development) SQL (data querying and transformation API More ❯

contractor for a client that has a desire to integrate all of their APIs to move their business technology on to the next step. We are looking for an integration engineer who can help shape the future of the systems by working with providers and making sure APIs plug up to each other. This will be a 6 month … Strong documentation and communication - Ability to work with business stakeholders (e.g., Marketing, Ops) - Project management or agile familiarity - Problem-solving and debugging - Security awareness (especially around data flows and API access) - Testing and Quality Assurance Tech RESTful API design and integration Power Automate (workflow automation) Power Apps (low-code app development) SQL (data querying and transformation API More ❯

project management, stakeholder engagement, system configuration, testing, training, and go-live support, aligning with business objectives across residential, commercial, and development portfolios. A key focus will be managing the integration of the new system with HubSpot CRM, finance systems, and reporting tools, including oversight of developers working on APIs and data connectivity. Key Responsibilities Project Management & Delivery Develop and …/CRM) and external suppliers. Coordinate workshops to capture requirements and translate into system configuration. Provide regular updates and reports to senior management and project steering groups. System Design & Integration Work with vendors to configure modules (lease management, rent collection, service charges, credit control, facilities, reporting, integrations). Manage data migration from current systems, ensuring accuracy and completeness. Oversee … and coordinate API integrations with HubSpot, finance systems, banking platforms, tenant portals, and BI tools. Liaise with and manage external developers where custom integrations are required. Testing & Training Lead UAT (User Acceptance Testing) across teams, ensuring scenarios cover real-world use cases. Define test scripts for integrations (HubSpot sync, API data flows, reporting pipelines). Develop training materials More ❯

project management, stakeholder engagement, system configuration, testing, training, and go-live support, aligning with business objectives across residential, commercial, and development portfolios. A key focus will be managing the integration of the new system with HubSpot CRM, finance systems, and reporting tools, including oversight of developers working on APIs and data connectivity. Key Responsibilities Project Management & Delivery Develop and …/CRM) and external suppliers. Coordinate workshops to capture requirements and translate into system configuration. Provide regular updates and reports to senior management and project steering groups. System Design & Integration Work with vendors to configure modules (lease management, rent collection, service charges, credit control, facilities, reporting, integrations). Manage data migration from current systems, ensuring accuracy and completeness. Oversee … and coordinate API integrations with HubSpot, finance systems, banking platforms, tenant portals, and BI tools. Liaise with and manage external developers where custom integrations are required. Testing & Training Lead UAT (User Acceptance Testing) across teams, ensuring scenarios cover real-world use cases. Define test scripts for integrations (HubSpot sync, API data flows, reporting pipelines). Develop training materials More ❯