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Expleo • United Kingdom
Role & seniority: Test Systems Software Engineer; hands-on software engineer (seniority not explicitly stated)
Stack/tools: C/C++ and/or C#; LabWindows/CVI, NI TestStand or similar; debugging in lab environments; serial and network communications (RS232/422/485, Ethernet, CAN, Modbus, 1553); data acquisition/instrumentation interfaces; scripting languages; CI/CD and build pipelines
Design and develop software for automated/semi-automated engineering test systems across the product lifecycle
Interface with instrumentation, data acquisition devices, and custom hardware; integrate with communications/control interfaces
Create modular test frameworks, apply software engineering best practices (unit tests, reviews, CI), document requirements and test artefacts
Strong C/C++ and/or C# programming
Experience in software for test, instrumentation, or hardware-integrated systems
Knowledge of automated test principles, test frameworks (LabWindows/CVI, NI TestStand), lab debugging, and version control/CI
Familiarity with serial/network communications and ability to read schematics
Problem-solving, analytical skills, and cross-functional collaboration
Electronics or embedded systems knowledge; ATE architectures; DAQ/PXI/GPIB/VISA
Python or PowerShell scripting; continuous integration/build tooling; DevOps practices
Experience in regulated/safety-critical industries; Agile/Scrum e
Overview Expleo is a trusted partner for end-to-end, integrated engineering, quality services and management consulting for digital transformation. We help businesses harness unrelenting technological change to successfully deliver innovations that will help them gain a competitive advantage and improve the everyday lives of people around the globe. We are seeking a Test Systems Software Engineer to join a specialist Test Engineering Software group supporting the design, development and sustainment of engineering test equipment used to validate complex defence systems and sub-assemblies. This role focuses on developing robust, maintainable software for test equipment and engineering test solutions across the full product lifecycle, from early concept and prototyping through to production and in-service support. You will work in a software engineering lab environment closely integrated with electronics, instrumentation and hardware teams, collaborating across multiple engineering disciplines to deliver high-quality, reliable test capability to meet programme delivery schedules. This position suits a hands-on software engineer who enjoys working at the intersection of software, hardware and electronics rather than purely desktop or web-based development. Responsibilities Design and develop software for automated and semi-automated engineering test systems Implement test solutions using C, C++, C# and appropriate scripting languages Develop software to interface with instrumentation, data acquisition devices and custom electronic hardware Integrate software with communications and control interfaces (Ethernet, serial, field buses, etc.) Support hardware bring-up, system integration, debugging and fault-finding activities in lab environments Create modular, maintainable and reusable test frameworks and architectures Apply software engineering best practices including unit testing, code reviews and continuous integration Contribute to automation, build pipelines and DevOps workflows Produce technical documentation, requirements traceability and test artefacts Collaborate with systems, electronics, firmware and production teams to define and deliver test capability Support issue resolution and ongoing improvement of deployed test systems Qualifications Degree (or equivalent experience) in Software Engineering, Computer Science, Electronic Engineering or a related technical discipline. Essential skills Strong programming skills in C/C++ and/or C# Experience developing software for test, instrumentation or hardware-integrated systems Understanding of automated test principles and engineering test methodologies Experience with LabWindows/CVI, NI TestStand, or similar test frameworks Familiarity with serial and network communications (RS232/422/485, Ethernet, CAN, Modbus, 1553, etc.) Practical debugging and fault-finding skills in lab environments Knowledge of software quality practices (unit testing, clean design, version control, CI/CD) Ability to read schematics and work alongside electronics hardware Strong problem-solving and analytical capability Effective communication and cross-functional collaboration skills. Desired skills Electronics or embedded systems knowledge Experience with automated test equipment (ATE) architectures Hardware control and data acquisition integration (DAQ, PXI, GPIB, VISA, etc.) Scripting languages (Python, PowerShell or similar) Continuous integration/build tooling and DevOps practices Experience working within regulated or safety-critical industries (defence, aerospace, automotive, medical) Exposure to Agile/Scrum environments Experience Proven experience developing software for engineering or hardware-integrated systems Experience delivering test systems or manufacturing/production test solutions preferred Experience working across the full development lifecycle from concept through deployment and support Experience working within multi-disciplinary engineering teams. What do I need before I apply Eligibility and willingness to obtain SC Clearance (Security Check Clearance) is essential. Benefits Collaborative working environment – we stand shoulder to shoulder with our clients and our peers through good times and challenges We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects Expleo Academy - enables you to acquire and develop the right skills by delivering a suite of accredited training courses Competitive company benefits Always working as one team, our people are not afraid to think big and challenge the status quo