Senior Software Engineer

• Design, develop, test, and maintain secure, high-assurance software solutions
• Work within collaborative engineering teams to deliver customer-focused capabilities
• Conduct peer reviews and support mentoring of junior engineers
• Apply secure development principles throughout the software lifecycle
• Contribute to CI/CD and automated testing practices
• Identify potential security vulnerabilities and recommend mitigations
• Work with emerging technologies and adapt to evolving technical challenges

• Strong software engineering experience using languages such as C++, Java, or C#
• Experience with utility or scripting languages such as Python or JavaScript
• Familiarity with development tools including IDEs, source control, and debuggers
• Understanding of secure or high-assurance development principles
• Experience with testing methodologies, CI, and modern software engineering practices
• Ability to work across multiple operating systems and technologies
• Strong communication and collaboration skills

• Dedicated training budget in your first year
• Opportunities to attend major cybersecurity conferences and specialist training
• Flexible working arrangements and strong work-life balance
• Minimum 25 days holiday plus bank holidays
• Private medical and dental insurance
• Competitive pension scheme
• Additional flexible benefits package including cycle to work scheme and wellbeing support
• Clear progression pathways and ongoing career development

A leading cyber and national security organisation is seeking experienced Software Engineers to join a highly skilled operational cyber team delivering mission-critical capabilities across a range of secure programmes. This role offers the opportunity to work on some of the UK's most challenging cybersecurity projects, developing high-assurance software solutions that directly support national security operations. The team works across a broad range of technologies, platforms, and secure environments, with strong investment in training and career development.