Portsmouth

SC Cleared Software Engineer

Posted on Tuesday, 14th July 2026

IT and Internet
Portsmouth
£45k - 65k per year
Permanent

Join Our Client as a SC Cleared Software Engineer

Organisation Overview

Our Client is a leading provider of advanced software solutions primarily serving the defence, nuclear, space, and energy industries. Renowned for their innovation and technical excellence, they are committed to delivering impactful projects that support critical national infrastructure and strategic initiatives. Their collaborative culture fosters continuous growth and development, making it an exceptional place for talented professionals to thrive. With a focus on cutting-edge technologies and a reputation for excellence, they offer a supportive environment alongside comprehensive benefits.

Role Summary

In response to increased project demands and strategic growth, our Client is seeking a highly skilled Software Engineer with security clearance at the SC (Security Check) level. This vital role will be instrumental in advancing complex software development projects that require strong technical aptitude combined with security compliance. The position offers a unique chance to contribute to secure and impactful solutions within a dynamic team, making a real difference in areas vital to national interests.

Responsibilities

  • Develop, test, and maintain secure software applications aligned with project specifications.
  • Collaborate with multidisciplinary teams to design innovative solutions for simulation, modelling, or autonomous system development.
  • Analyse technical requirements and translate them into effective software solutions.
  • Ensure all development work adheres to necessary security standards and protocols.
  • Document technical processes and prepare detailed reports for internal review and client delivery.
  • Support integration and testing activities on client sites as needed.
  • Maintain awareness of evolving security requirements and best practices in software development.

Essential Skills & Experience

  • Proven experience in software engineering, with a strong background in developing large, complex applications.
  • Existing security clearance at SC level or higher.
  • Proficiency in programming languages such as C/C++ and Python.
  • Knowledge of simulation and modelling techniques, including experience with simulation engines or autonomous systems.
  • Ability to understand and work with hardware performance considerations and large codebases.
  • Excellent technical reporting and communication skills.
  • Demonstrable problem-solving skills with the ability to interpret complex requirements.
  • Willingness to travel within the UK and work at client sites.

Desirable Skills & Experience

  • Previous involvement in defence-related projects or working within secure environments.
  • Experience working with defence industry standards and protocols.
  • Academic background in STEM or computing disciplines.
  • Familiarity with tools such as MS Office (Excel, PowerPoint, Word).
  • Experience working with gaming engines like Unreal Engine or similar is advantageous but not essential.

Call to Action

If you are a forerunner in software engineering with active SC security clearance and are eager to make a meaningful impact through cutting-edge projects, we encourage you to submit your CV today. Join a team dedicated to excellence, innovation, and national security-your expertise can drive the future of secure technology solutions.

Apply for this role