9 systems integration developer jobs found

IBM LANSA Developer Contract | Remote | Outside IR35 (if applicable) We're supporting a consultancy client on the delivery and enhancement of a critical enterprise application platform and are looking for an experienced IBM LANSA Developer to join the team. This role will suit someone with strong experience across Visual LANSA, IBM i/AS400 environments and enterprise application development. You'll be working closely with technical stakeholders to maintain, enhance and modernise existing business-critical systems. Key Responsibilities Develop, maintain and enhance applications using Visual LANSA Work across IBM i/AS400 environments Support the modernisation of Legacy business systems Develop and maintain integrations with internal and external systems Troubleshoot and resolve application issues Work closely with technical and non-technical stakeholders to understand requirements and deliver solutions Contribute to system improvements, performance optimisation and best...

Power Apps Developer Duration: Until end of November 2026 Location: Remote working with occasional travel to the West Midlands (Candidates must be UK based) Rate: £440.00 per day - Outside IR35 Our leading manufacturing client in the West Midlands is partway through a data platform programme consolidating a large number of source systems into a modern Lakehouse built on Microsoft Fabric. The programme now needs a dedicated Power Apps Developer to design and build an operations and administration application - a "warehouse manager" Front End. You will own the build of a Power Apps-based administration tool sitting over the Fabric data platform. An outline specification/framework will be provided by the client's technical lead, but the successful candidate will be expected to shape the detail, make sensible design decisions independently, and deliver at pace with minimal hand-holding. Essential Skills & Experience Power Apps expertise: Strong, demonstrable...

Power Apps Developer Duration: Until end of November 2026 Location: Remote working with occasional travel to the West Midlands (Candidates must be UK based) Rate: £440.00 per day - Outside IR35 Our manufacturing client is partway through a data platform programme consolidating a large number of source systems into a modern Lakehouse built on Microsoft Fabric. The programme now needs a dedicated Power Apps Developer to design and build an operations and administration application - a "warehouse manager" front end - so the platform can be run day-to-day without engineers diving into workflows, reading logs, or hand-writing SQL. You will own the build of a Power Apps-based administration tool sitting over the Fabric data platform. An outline specification/framework will be provided by the client's technical lead, but the successful candidate will be expected to shape the detail, make sensible design decisions independently, and deliver at pace with minimal hand-holding....

Power Apps Developer Duration: Until end of November 2026 Location: Remote working with occasional travel to the West Midlands (Candidates must be UK based) Rate: £440.00 per day - Outside IR35 Our manufacturing client is partway through a data platform programme consolidating a large number of source systems into a modern Lakehouse built on Microsoft Fabric. The programme now needs a dedicated Power Apps Developer to design and build an operations and administration application - a warehouse manager front end - so the platform can be run day-to-day without engineers diving into workflows, reading logs, or hand-writing SQL. You will own the build of a Power Apps-based administration tool sitting over the Fabric data platform. An outline specification/framework will be provided by the client 's technical lead, but the successful candidate will be expected to shape the detail, make sensible design decisions independently, and deliver at pace with...

Senior Test Analyst (API & Integration Testing) – Contract Location: Milton Keynes (2-3 days onsite per week) Rate: £390-£400 per day Contract: Outside IR35 The Role Our customer, a leading automotive organisation, is seeking a Senior Test Analyst to support a major transformation programme involving system integrations, API-driven applications, and data migration activities. Working closely with business stakeholders, developers, and project teams, you will be responsible for ensuring the quality and reliability of business-critical systems through comprehensive testing across multiple platforms and integrations. Essential Experience Strong commercial experience in API, Integration, and Manual Testing Hands-on experience with Postman Experience testing complex system integrations and interfaces Data Migration testing experience, including data validation and reconciliation Experience creating and executing test plans, test cases, and test scripts...

Software Test Engineer / Lead – Outside IR35   My client is the fastest growing technology company who is seeking a Software Test Engineer / Lead for an initial 12-month contract. As a Software Test Engineer / Lead you should have experience with both Manual and Automated Testing, Regression Testing or Performance Testing. As a team player you will be liaising with other multi-functional testers and software designer / developers to understand the business requirements and product functionality, You will be involved in software test spec, manual test cases, automated test scripts and performance testing solutions that will need to be implemented throughout the delivery pipeline. Involvement in production and maintenance of system testing and systems integration of hardware and software components through to resolution of all faults found in the software. You will ideally be degree educated in an engineering or science subject, with a good IT content and ISTQB® certification is...

C++ Developer - Remote UK - £400/day Outside IR35 | C++ | MS SQL | .NET | Memory Management | Templates | Concurrency Models | Performance‑critical programming We’re looking for Senior C++ Developers to join a client of mine and support the ongoing evolution of a large‑scale platform transformation . You’ll be part of a collaborative engineering team delivering modern, scalable SaaS solutions within a complex, business‑critical environment. This role offers the opportunity to influence the technical direction of a major SaaS transformation programme , modernising long‑standing legacy capabilities while delivering new platform functionality. As a Senior C++ Developer on the project, you’ll work end‑to‑end on mission‑critical applications , building high‑performance solutions using C++ and .NET , with a strong focus on memory management, templates, concurrency models, and system performance . You’ll contribute to the design and development of core platform...

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...

C++ Developer - Remote UK - £400/day Outside IR35 | C++ | MS SQL | .NET | Memory Management | Templates | Concurrency Models | Performance‑critical programming We’re looking for Senior C++ Developers to join a client of mine and support the ongoing evolution of a large‑scale platform transformation . You’ll be part of a collaborative engineering team delivering modern, scalable SaaS solutions within a complex, business‑critical environment. This role offers the opportunity to influence the technical direction of a major SaaS transformation programme , modernising long‑standing legacy capabilities while delivering new platform functionality. As a Senior C++ Developer on the project, you’ll work end‑to‑end on mission‑critical applications , building high‑performance solutions using C++ and .NET , with a strong focus on memory management, templates, concurrency models, and system performance . You’ll contribute to the design and development of core platform...