Cyber Software Engineer

• Full-time onsite role in Romsey, Hampshire
• Day rate up to £725 per day, inside IR35
• Active DV clearance required
• Long-term programme delivering mission-critical national security solutions

Our client is a highly trusted technology partner within the UK national security community, delivering complex, mission-critical solutions across cyber, software, and advanced analytics.

They bring together engineers, scientists, and technologists to solve some of the most challenging problems in defence and security. Due to continued programme growth, they are seeking an experienced Cyber Software Engineer to join their onsite team in Romsey.

As a Cyber Software Engineer, you will work across the full lifecycle of secure systems, from research and reverse engineering through to design, development, testing, and operational deployment. You will contribute to projects spanning embedded devices, user equipment, servers, and cloud environments, collaborating closely with multidisciplinary teams and end clients.

Key responsibilities include:

• Reverse engineering and analysis of complex software and firmware
• Designing and developing secure, resilient software solutions
• Building automated testing and CI and CD pipelines
• Working across Linux, Windows, Android, and cloud-based platforms
• Supporting research and experimentation to solve novel technical problems

• Strong experience in software analysis and reverse engineering on x86, x64, or ARM
• Deep understanding of operating systems, firmware, and security architectures
• Proven delivery of software in C, C++, Java, or C#
• Scripting and tooling experience with Python, Bash, Power Shell, or similar
• Experience with modern development practices, automated testing, and Agile delivery

Please either apply through this advert or email me directly at rob For further information, call me on

By applying, you give express consent for us to process and submit your application to our client for this vacancy only.

Cyber Software Engineer, Reverse Engineering, Binary Analysis, IDA Pro, Ghidra, C, C++, Java, C#, Python, Bash, Power Shell, Linux, Windows, Android, Firmware, Embedded Systems, CI CD, Dev Ops, Agile, DV, National Security, NSD