Principal Software Engineer (C++ / Unreal Engine)

Portsmouth
1 month ago
Applications closed

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Principal Software Engineer
Portsmouth | Hybrid, 3 days onsite
£75,000-£85,000 plus bonus and benefits

This Principal Software Engineer role is designed for a hands-on technical leader with strong C++ and Unreal Engine expertise, working at the forefront of complex, performance-critical software delivery. The role combines advanced engineering with genuine technical authority, shaping how simulation-driven and autonomy-focused systems are designed, built and evolved.

The position sits within a fast-growing software and data science consultancy delivering end-to-end solutions across defence, energy, transport and health. You will work closely with subject matter experts and senior stakeholders on high-impact programmes spanning modelling and simulation, autonomy, geospatial systems, synthetic environments and digital twins.

This is a true principal-level role. You will remain deeply technical while setting direction, leading teams and acting as the technical authority across projects.

What you will be doing

  • Leading the design and delivery of complex software solutions using C++ and Unreal Engine
  • Acting as technical lead across modelling and simulation, wargaming and autonomous systems
  • Applying mathematical and computational techniques to solve real-world problems
  • Owning key technical decisions across architecture, tooling and performance
  • Mentoring engineers and enabling high-performing delivery teams
  • Delivering technical consultancy engagements and leading selected projects
  • Building trusted relationships with customers and stakeholders
  • Supporting bids, proposals and technical reporting

    What you will bring
  • Extensive experience, typically 15+ years, delivering high-performance software
  • Proven technical leadership at Principal or Technical Lead level
  • Strong hands-on expertise in C++ and Unreal Engine
  • Background in simulation, autonomy, robotics or game-engine-driven environments
  • Experience working with large, complex codebases and performance constraints
  • Strong stakeholder management, communication and influencing skills

    What's on offer
  • Salary up to £85,000, flexible for exceptional technical leaders
  • 7 percent employer pension contribution
  • Vitality private healthcare
  • 25 days holiday with the option to buy or sell additional days
  • Life assurance
  • EV salary sacrifice scheme
  • Discretionary bonus linked to company performance
  • Structured mentoring and ongoing technical development

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