Software Engineer

Frontier Resourcing; Cheltenham; On-site; GBP 70,000 - 90,000; Full time

Job summary

Frontier Resourcing LTD is seeking a Senior C++ Engineer in Cheltenham to design and maintain high‑performance software for national security projects.

The role focuses on delivering scalable systems in Linux, with active DV clearance preferred. Salary £70,000-£90,000 and a 37.5‑hour work week.

You will influence architectural decisions, mentor colleagues and stay at the cutting edge of ultra-low-latency software.

Qualifications

• Experience with modern C++ in a Linux environment.
• Strong software engineering fundamentals and design practices.
• Ability to tackle complex technical problems and deliver maintainable code.
• Active DV clearance or recently active DV clearance.
• Willingness to learn continuously and contribute to the team.

Responsibilities

• Design, develop and maintain high‑performance software and systems.
• Drive technical solutions and influence engineering decisions.
• Support and mentor colleagues to raise engineering quality.
• Challenge existing approaches and explore new technologies, including ultra-low latency applications.

Skills

Modern C++

Linux

Software engineering principles

Problem solving

Learning mindset

Collaboration

DV clearance

Influence engineering decisions

Job description

Senior C++ Engineer

Location: Cheltenham

Salary: £70,000-£90,000

Security Clearance: Active DV or recently active DV

Build technology that makes a real difference

Are you a Senior C++ Engineer looking for your next challenge? Want to work on complex, high-performance software where your technical expertise genuinely matters?

We're looking for experienced Senior C++ Engineers to join a growing engineering team delivering challenging projects across the UK National Security and Defence sector.

This is an opportunity to tackle demanding technical problems, influence engineering decisions and develop cutting-edge software alongside talented engineers in a collaborative, engineer-led environment.

Why join?

You'll be joining a team where engineering excellence, continuous learning and collaboration are central to the culture.

• Meaningful engineering: Work on complex software and digital infrastructure challenges supporting national security.
• Technical influence: Shape architecture, influence engineering decisions and introduce new ideas.
• Continuous development: Dedicate 10% of your working time to training and professional development.
• Collaborative culture: Work alongside talented engineers who value knowledge-sharing, creativity and technical problem-solving.
• Work-life balance: Enjoy a 37.5-hour working week and a supportive working environment.

The role

As a Senior C++ Engineer, you'll design, develop and maintain high-performance software, contributing to scalable, reliable and supportable systems. You'll help drive technical solutions, tackle challenging engineering problems and support the development of colleagues around you.

You'll be encouraged to challenge existing approaches, explore new technologies and contribute to software development where performance and efficiency are critical, including ultra-low-latency applications.

What we're looking for

• Strong experience developing software using modern C++.
• Experience working within a Linux environment.
• A solid understanding of software engineering principles, design and development practices.
• The ability to solve complex technical problems and deliver robust, maintainable code.
• A proactive approach to learning, collaboration and continuous improvement.
• The confidence to contribute to technical discussions and influence engineering decisions.
• Active DV clearance or recently active DV clearance.