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 an experienced ADA/C++ Software Engineer to play a key role in the development and sustainment of mission-critical software within the Defence sector. This position offers an exciting opportunity to contribute directly to the reliability, safety, and performance of embedded software solutions that support vital defence programmes. The successful candidate will be involved across the full software development lifecycle - from requirements analysis and design to implementation, integration, testing, and support - ensuring compliance with defined processes, industry standards, and customer expectations. Design, develop, and maintain real-time embedded software using ADA/C++.Produce, review, and maintain software design documentation, test artefacts, and associated technical deliverables.Conduct peer reviews of software code, designs, and test cases to ensure quality and adherence to standards.Plan and execute unit, integration, and system-level testing activities.Develop reusable software modules and support continuous improvement of development practices.Ensure all software and documentation align with Defence and industry sta