C++ Software Engineer – Cyber Security

Avanti Recruitment; Melbourn; Hybrid; GBP 59,000 - 72,000; Full time

Benefits offered by this job

Annual bonus

8% pension contribution

Private healthcare

25 days holiday

Share ownership scheme

Training and career development

Job summary

Avanti Recruitment is seeking a C++ Software Engineer for a cybersecurity hardware and software environment in Cambridge/Melbourn. Hybrid work with a strong emphasis on secure, reliable software across embedded and networking domains.

You will contribute to modern C++ with Python automation and Linux-based development, joining a small, skilled team delivering impactful security technologies. You should have commercial C++ experience, familiarity with Linux environments, and an interest in

Qualifications

• Experience developing software in modern C++ with exposure to Python and Linux environments.
• Embedded software experience is a big bonus, including bare-metal or embedded Linux/RTOS.
• Experience with networking, multithreading, real-time systems or cyber security is valuable.
• Strong emphasis on clean, maintainable code, TDD and collaborative design.

Responsibilities

• Develop software in modern C++ and STL for secure networking products.
• Contribute to Python-based automation and tooling.
• Perform Linux application development and integration tasks.
• Work on embedded software and low-level systems across hardware boundaries.
• Handle real-time networking protocols and secure data transfer concepts.
• Collaborate with peers to ensure code quality and test coverage.

Skills

Modern C++

Python

Linux

Embedded software

Multithreading

RTOS/Real-time

Networking

Cyber security

Job description

C++ Software Engineer – Cyber Security

Cambridge / Melbourn (Hybrid) | Up to £65,000 + Bonus

I'm recruiting for an established engineering company with a specialist scale-up team developing advanced cyber security products used to protect some of the UK's most sensitive networks across defence, government, energy and critical infrastructure.

The company designs and manufactures its technology in-house, including hardware-enforced data diodes that allow information to flow securely between networks with different security levels. It's a chance to work on technically challenging products where software reliability, performance and security are critical.

The Role

You’ll join a small, highly skilled engineering team working on both existing products and the next generation of secure networking technology.

The work covers a variety of areas, including:

• Modern C++ and STL development
• Python development and automation
• Linux application development
• Embedded software and low-level systems
• Real-time networking and communication protocols
• Network security and secure data transfer
• Linux platform integration and bring-up

There's plenty of opportunity to get involved in different parts of the technology, influence design decisions and develop new skills.

What They're Looking For

Ideally, you’ll have commercial experience developing software in modern C++, with some exposure to Python and Linux environments.

Embedded software experience would be a big bonus, particularly bare-metal development, embedded Linux or RTOS.

Experience with networking, multithreading, real-time systems or cyber security would also be valuable, although you don’t need to tick every box.

The team places a strong emphasis on clean, maintainable code, test-driven development (TDD), pair programming and collaboration.

Why Consider It?

• Work on specialist cyber security technology with real-world impact.
• Develop products used to protect critical national infrastructure.
• Join a small engineering team with the backing of a large, established organisation.
• Gain exposure to embedded Linux, networking, security and low-level development.
• Work alongside experienced engineers in a collaborative, learning-focused environment.
• Opportunities for technical progression and continued development.

Salary & Benefits

Salary: Up to £65,000 depending on experience

Location: Cambridge / Melbourn, hybrid working

Benefits include:

• Annual performance bonus
• 8% employer pension contribution
• Private healthcare, including family cover
• 25 days' holiday, with the option to purchase 5 additional days
• Share ownership scheme
• Training and career development

Security Clearance: Due to the nature of the projects, candidates must be eligible for UK security clearance, including the project's UK Eyes Only requirements.