Senior Software Engineers (ADA 95)

Expleo · Portsmouth, HPH

Senior Software Engineers (ADA 95) at Expleo, based in Portsmouth, HPH. This is a permanent role.

Salary
Competitive
Location
Portsmouth, HPH
Contract
Permanent
Posted
4 days ago
Closes
17 Sep 2027
Sector
Software Developer

Reference 7ddd774943c83a443ecd2e386369cdf6d7431125

About the role

Overview

Expleo is seeking a Senior Software Engineer to support the development, sustainment, integration and deployment of advanced test & simulation systems operating within secure and regulated environments. The role covers the full software development lifecycle, including defect investigation, software design and modification, integration, verification, regression testing, release preparation and deployment support. The successful candidate will work with existing, long-life software baselines and contribute to the delivery of approved changes, defect resolutions and system enhancements. Working as part of a multidisciplinary engineering team, the Senior Software Engineer will provide technical leadership for complex software investigations, support engineering reviews and help ensure that software outputs are technically complete, traceable and appropriately controlled. The position provides the opportunity to work on complex, mission-critical systems that support operational training and simulation capabilities. The role is primarily site-based within a secure engineering environment and may involve occasional travel to authorised locations for integration, testing and deployment activities.

Responsibilities

  • Develop, modify and maintain software applications supporting test & simulation systems.
  • Lead or undertake software defect investigation, root-cause analysis and fault resolution.
  • Analyse change requirements and produce engineering assessments, effort estimates and technical recommendations.
  • Design and implement approved software changes and system enhancements.
  • Undertake code reviews and provide constructive technical challenge.
  • Support software integration across hardware interfaces, networks, operating systems and external systems.
  • Plan and undertake unit, integration, regression and defect-verification testing.
  • Generate objective test evidence and produce clear, auditable test reports.
  • Maintain traceability between defects, approved changes, source-code updates, test evidence and release artefacts.
  • Apply configuration-management and version-control processes to software and supporting documentation.
  • Generate controlled software builds and prepare release candidates.
  • Produce and maintain technical documentation, including design information, configuration records, test evidence and release documentation.
  • Support release reviews, deployment preparation and authorised deployment activities.
  • Investigate and resolve complex issues affecting operational or representative test environments.
  • Participate in sprint planning, technical reviews, peer reviews, retrospectives and backlog-refinement activities.
  • Provide accurate progress reporting, including deliverable status, risks, issues, dependencies and planned activities.
  • Identify and escalate technical risks and issues through the appropriate engineering routes.
  • Support transition and knowledge-transfer activities where required.
  • Work collaboratively with software, systems, integration, test, assurance and support teams.
  • Comply with applicable quality, safety, security, software-development and engineering-governance requirements.

Qualifications

  • Degree, HNC, HND or equivalent qualification in Software Engineering, Computer Science, Electronic Engineering, Systems Engineering or a related STEM discipline.
  • Equivalent practical software-engineering experience will also be considered where supported by relevant technical expertise and evidence of delivery.
  • Evidence of continued professional development in software engineering, systems integration, verification, configuration management or a related discipline is desirable.
  • Professional registration or progress towards professional registration is desirable but not essential.

Essential skills

  • Strong software design, development, debugging and maintenance skills.
  • Demonstrable software-development experience using Ada 95.
  • Software-development experience using C++ and/or C#.
  • Ability to understand, modify and review existing and long-life software baselines.
  • Structured software defect investigation and root-cause analysis.
  • Code-review and peer-review skills.
  • Unit, integration and regression testing.
  • Verification of software fixes and production of objective test evidence.
  • Software configuration management and controlled change management.
  • Version-control experience using Git, Subversion or an equivalent repository tool.
  • Software-build generation and release-candidate preparation.
  • Ability to maintain traceability across requirements, defects, changes, source code, tests and releases.
  • Working knowledge of Microsoft Windows and Linux operating environments.
  • Ability to produce clear technical documentation, engineering assessments and test reports.
  • Ability to estimate software-engineering activities and communicate assumptions, dependencies and technical risks.
  • Strong analytical and problem-solving capability.
  • Clear written and verbal technical communication.
  • Ability to work effectively within a multidisciplinary engineering team.
  • Ability to work within formal engineering-governance, configuration-control and security processes.
  • Ability to deliver work through sprint-based or iterative engineering processes.

Experience

  • Significant experience delivering software engineering within a commercial, defence, aerospace, maritime or other regulated engineering environment.
  • Experience developing, maintaining or supporting software using Ada 95.
  • Experience developing or maintaining software using C++ and/or C#.
  • Experience maintaining and enhancing operational, deployed or long-life software systems.
  • Experience working with mixed-language software baselines.
  • Experience investigating and resolving complex software defects.
  • Experience undertaking structured root-cause analysis.
  • Experience designing and implementing approved software changes.
  • Experience working under formal change-control and configuration-management arrangements.
  • Experience conducting code reviews and technical peer reviews.
  • Experience with unit, integration, regression and defect-verification testing.
  • Experience generating objective test evidence and formal test reports.
  • Experience producing controlled software builds and supporting release activities.
  • Experience preparing release notes, deployment information or other release artefacts.
  • Experience integrating software with hardware interfaces, operating systems, networks or external systems.
  • Experience producing and maintaining controlled technical documentation.
  • Experience working as part of a multidisciplinary engineering team.
  • Experience communicating technical findings, estimates, risks and recommendations to engineering stakeholders.
  • Experience working within sprint-based or iterative delivery environments.
  • Experience supporting software deployment and post-deployment regression testing.
  • Experience operating within secure facilities or controlled engineering environments.
  • Experience of test & simulation systems is desirable.
  • Experience of defence, maritime, training or synthetic-environment systems is desirable.
  • Experience using Jira or an equivalent backlog and defect-management tool is desirable.
  • Experience using Teamcenter or an equivalent pr

Reference: 7ddd774943c83a443ecd2e386369cdf6d7431125 · Posted 4 days ago · Closes 17 Sep 2027 · Listed via Expleo

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