Test Systems Software Engineer

  • Expleo
  • Stevenage, Hertfordshire
  • 16/06/2026
Full time Information Technology Telecommunications

Job Description

Overview

Expleois 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 ourpeers 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
  • ExpleoAcademy - 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
  • As a Disability Confident Committed Employer we have committed to:
    • Ensure our recruitment process is inclusive and accessible
    • Communicating and promoting vacancies
    • Offering an interview to disabled people who meet the minimum criteria for the job
    • Anticipating and providing reasonable adjustments as required
    • Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people

"We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age".

We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive