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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - Marine Training Systems - **Company:** Expleo - **Location:** Portsmouth, UK - **Experience:** Expert - **Contract:** Temporary contract - **Skills:** Testing (Software), Microsoft Windows, Active Directory, Software Applications, Systems Engineering, C++ (Programming Language), Software Debugging, Hardware Interface Design, Integrated Development Environments, Microsoft Visual Studio, Windows Servers, Network Configuration and Change Management, Software Maintenance, Release Management, Software Deployment, Software Engineering, Software Systems, Subversion, Systems Integration, TortoiseSVN, VMware Virtualization, Computer Networking Systems, Software Verification, SC Clearance, Information Technology, Operational Systems, Software Version Control, Vmware - **Published:** July 29, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=f5d438c3e856d7df ## About the Role * Degree qualified in Software Engineering, Computer Science, Systems Engineering or a related STEM discipline. * Equivalent industry experience will be considered where supported by relevant technical expertise and engineering delivery experience. Essential skills: * Strong software development skills in C and/or C++. * Software debugging, troubleshooting and fault investigation. * Software testing and verification. * Microsoft Visual Studio development environment. * Windows operating systems and applications support. * Configuration and version control using SVN/Tortoise SVN or equivalent tools. * Experience integrating software with hardware interfaces and networked systems. * Strong analytical and problem-solving capability. * Technical documentation and communication skills. * Ability to work effectively within multidisciplinary engineering teams. Desired skills: * ADA development experience. * Active Directory administration and support. * VMware virtualisation technologies. * Windows Server administration. * Software deployment and release management. * Training and simulation systems experience. * Maritime or naval systems knowledge. * Defence systems integration. * Network configuration and troubleshooting. * Security-focused software maintenance and patching. Experience: * Significant experience in software engineering within a commercial, defence or regulated engineering environment. * Experience developing software using C and/or C++. * Experience supporting software verification and test activities. * Experience maintaining and enhancing operational or deployed software systems. * Experience working within structured release and deployment processes. * Experience integrating software with hardware and networked systems. * Experience troubleshooting and resolving complex software defects. * Experience working as part of multidisciplinary engineering teams. Desired Experience: * Defence sector experience. * Maritime, naval or training systems experience. * Experience within simulation or synthetic training environments. * Active Directory administration experience. * Experience working within secure facilities or classified environments. * VMware administration or support experience. * Experience supporting customer deployments and operational acceptance activities. * Experience maintaining legacy software systems and mixed-language codebases. What do I need before I apply: * Must be eligible to obtain and maintain UK Security Clearance (SC). * Willingness to work within secure defence facilities and controlled environments. * Willingness to travel occasionally to customer sites. * Must be capable of working on operational support and maintenance activities for deployed systems. * Must be eligible to work in the United Kingdom. ## Description Expleo is seeking a Senior Software Engineer - Marine Training Systems to support the development, maintenance, integration and deployment of advanced training and simulation systems operating within secure defence environments. The role is focused on sustaining and enhancing operational simulation and training solutions throughout their support lifecycle. Working as part of a multidisciplinary engineering team, the successful candidate will contribute to software development, verification, system integration, release activities and customer deployments across a range of naval and defence training platforms. This position offers the opportunity to work on complex, mission-critical systems used by defence customers, supporting software updates, capability enhancements and the ongoing reliability of operational training environments. This role is based full-time on-site, working directly alongside customer engineering and assurance teams throughout programme execution. Responsibilities: * Develop, modify and maintain software applications supporting training and simulation systems. * Perform software testing, verification and defect resolution activities. * Support software patching, server updates and system maintenance activities. * Participate in system integration activities involving hardware interfaces, networks and external systems. * Support software releases through established acceptance and deployment processes including FAT, TRR, TCR and customer site deployment. * Investigate and resolve complex technical issues affecting operational systems. * Produce and maintain technical documentation and engineering artefacts. * Support deployment, installation and troubleshooting activities at customer locations. * Work collaboratively with systems, software, integration and support teams. * Contribute to continuous improvement of engineering and support processes. * Ensure compliance with quality, safety and security requirements, + 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 ## Related Videos - [Great DevEx and Regulatory Compliance - Possible?](https://www.wearedevelopers.com/videos/1426-great-devex-and-regulatory-compliance-possible) - [Defeat that legacy monster! 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