9 systems integration developer jobs found

Role - Fullstack Dynamics 365 & Power Pages Developer Location - Hybrid, 2 days onsite per week in London Docklands Contract - Initial 3 months Rate - up to £370 per day This role has been deemed Outside IR35 The Opportunity An opportunity has arisen for a Dynamics 365 Full Stack & Power Pages Developer to join a business applications team responsible for developing and supporting key systems used by customers and colleagues. This role will suit a developer with strong Microsoft Dynamics 365, Power Platform and full stack development experience who is comfortable working across frontend, backend, integrations and portal development. You will play an important part in delivering new features and updates across a range of applications, helping to build secure, scalable and high-quality business solutions within the Microsoft ecosystem. The Role As a Dynamics 365 Full Stack & Power Pages Developer, you will design, develop and maintain...

Integration Developer (Backend + DevOps Focus) Location: Fully Remote Pay: £550-£600 per day (Outside IR35) Duration: Initial 6-month contract (with strong extension potential) The Role We're supporting a leading UK financial services organisation on a new platform build and they're looking for an Integration Developer with a strong DevOps background. This is a developer-first role with a significant DevOps leaning, ideal for someone who enjoys building Back End services ( TypeScript/Node.js on AWS) while owning how code is deployed, automated and operated at scale. You'll play a key role in designing and building deployment pipelines (Harness) while contributing to Back End engineering and platform integration work . Key Responsibilities Deliver infrastructure using Infrastructure as Code (Terraform) Develop high-quality Back End code in line with engineering standards Build and optimise CI/CD pipelines (Harness focus) Implement robust DevOps...

Boomi Integration Developer (ERP Programme) Location: Fully Remote UK, with occasional travel to an office Contract Type: Contract Duration: 6 Months Initial IR35 Status: Outside IR35 About the Role We are seeking a highly skilled Boomi Developer with proven experience integrating the ERP environment (Infor LN preferred) to join a digital transformation programme. You will be the core technical lead responsible for designing, building, and deploying robust, scalable integration pipelines between the ERP (Infor LN) and surrounding enterprise ecosystem (including CRM, MES, WMS, and third-party logistics/ 3PL partners). The ideal candidate will not just be a component builder in Boomi, but an integration specialist who understands complex manufacturing/ distribution data flows and can navigate the nuances of Infor LN data structures. Key Responsibilities Design & Build: design, develop,...

Integration Developer (Backend + DevOps Focus) Location: Fully Remote Pay: £550- £600 per day (Outside IR35) Duration: Initial 6-month contract (with strong extension potential) The Role We 're supporting a leading UK financial services organisation on a new platform build and they 're looking for an Integration Developer with a strong DevOps background. This is a developer-first role with a significant DevOps leaning, ideal for someone who enjoys building backend services ( TypeScript / Node.js on AWS) while owning how code is deployed, automated and operated at scale. You 'll play a key role in designing and building deployment pipelines (Harness) while contributing to backend engineering and platform integration work . Key Responsibilities Deliver infrastructure using Infrastructure as Code (Terraform) Develop high-quality backend code in line with engineering standards Build...

Full Stack Developer - Contract Position - HIRING ASAP Location: London, 3 days in office per week & 2 days remote per week Start Date: ASAP Duration: Till end of September (view to extend thereafter) Daily Rate: £400 - £500 per day outside IR35 Key Responsibilities Delivery focused development support Join the team on a freelance basis to provide additional senior level development capacity when required Take on more complex or time sensitive development tasks within existing systems, working within established patterns and architectures Deliver well scoped features, integrations, and campaign builds without introducing unnecessary changes to core platform architecture Live support & problem solving Provide experienced development support during campaigns, helping diagnose and resolve issues quickly and pragmatically Assist with troubleshooting production issues, identifying root causes, and implementing safe fixes under the direction of the...

QA / Integration Tester - Commodity Trading - London - Outside IR35 A leading energy company is seeking a hands-on QA / Integration Tester to support its LNG Technology team in the implementation of a new trading platform. Overview This role sits at the heart of a major platform rollout, focusing on end-to-end integration testing across an ETRM platform and its connected trading and operational systems. You'll play a critical role in ensuring system stability, data integrity, and workflow accuracy across the broader LNG trading ecosystem. Key Responsibilities Own and execute integration testing for the trading platform Validate cross-system workflows and data flows across connected energy trading systems Identify, document, and track defects through to resolution Work closely with developers, business analysts, and stakeholders to ensure quality delivery Operate as the sole QA resource on the project, driving testing independently...

Senior C# Engineer (AI-Native & Agentic Engineering) – .NET 8/9, AWS Lambda/SQS – OUTSIDE IR35 £750–£800/day • 100% Remote • 11-month rolling contract A rare opportunity to lead the build of a greenfield SaaS product as a deeply senior, hands-on C# engineer. Reporting directly to the Director of Engineering, you’ll operate as the technical spearhead; shaping architecture, driving AI-native engineering patterns, and delivering complex distributed systems at pace. We’re looking for someone who is product-centric, agentic-minded, and thrives in ambiguity . If you enjoy solving hard problems, owning outcomes end-to-end, and setting the engineering bar for others, this one’s for you. What You’ll Bring: Senior/Staff-level backend engineering depth in C# and .NET 8/9 , with the ability to architect and lead distributed REST microservices at scale. Strong authority in AWS serverless : Lambda-first, with hands-on experience across API Gateway, SQS, Step...

Test Engineer (Financial Services) – Contract Location: UK (London or Swindon preferred) Contract Length: 6–12 Months Rate: £350 per day IR35 Status: Outside IR35 We are currently seeking 3 experienced Test Engineers to join a major Financial Services organisation on a business-critical programme. This is an excellent opportunity for testing professionals with experience working within regulated environments and exposure to Unisys platforms. Key Responsibilities Design, execute, and maintain test cases and test scripts. Perform functional, system, integration, and regression testing. Identify, record, and manage defects through to resolution. Collaborate with developers, business analysts, and stakeholders to ensure requirements are fully understood and validated. Produce clear test documentation, evidence, and reporting. Participate in Agile ceremonies and contribute to delivery planning. Support continuous improvement of testing processes...

Senior AI Engineer (Contract) Rate: £700 / day IR35 Status: Outside IR35 Duration: 6 months (with high likelihood of extension) Location: Hybrid / Remote options available (UK-based) Security Clearance: DV Cleared The Role We are looking for a Senior AI Engineer to design, build, and deploy production-ready GenAI applications and multi-agent systems within secure environments. This role requires a strong hybrid of advanced AI orchestration and robust cloud-native engineering, specifically focusing on scaling workloads via Kubernetes. Because of the nature of this work, you must hold active UK Developed Vetting (DV) security clearance to be considered. Key Responsibilities Agentic Workflows: Design, implement, and optimize multi-agent frameworks and stateful LLM applications. Kubernetes Orchestration: Containerize, deploy, and scale AI models, APIs, and microservices across production Kubernetes (K8s) clusters. Infrastructure &...