Software Engineer / Senior Software EngineerLevel: £42,000 – £70,000 (depending on level) + bonus and benefitsLocation: Gloucester, UK | Hybrid & flexible working optionsFunction: Software Engineering | Data Processing | Cloud DevelopmentIndustry: Public Sector | National Security | DefenceDeliver software that safeguards communities. Contribute to projects that protect children, counter terrorism, and tackle serious organised crime.Our client’s National Security team in Gloucester is expanding and seeking Software Engineers and Senior Software Engineers. You’ll develop, test, and maintain software critical to national security, collaborate with analysts and engineers, mentor junior colleagues, and contribute to technology and cyber initiatives.About the RoleAs a Software Engineer or Senior Software Engineer, you’ll design, code, test, and document software systems that support national security operations. You’ll work across teams to ensure reliability, security, and performance. Senior engineers will additionally provide technical leadership, oversee design decisions, and mentor junior developers.What You’ll Be DoingDesigning, coding, testing, and documenting software programs for engineered information and communications systemsEstimating development effort for software projects and delivering solutions on timeWorking on data processing applications and AWS Cloud infrastructureMentoring junior developers and providing technical oversight (Senior level)Analysing code defects and implementing timely fixes to maintain system reliabilityIdeal BackgroundStrong back-end development experience in Java, JavaScript, Node.js, Python, or C/C++Passion for solving complex technical problems supporting child protection, counter-terrorism, and serious organised crimeDesire to continuously learn and develop new skillsKnowledge of cloud engineering (AWS, Docker, Microservices) is desirable but not essentialComfortable working in Agile teams, sharing knowledge, and mentoring peersWhat You’ll ReceiveSoftware Engineers: £42,000 – £62,000Senior Software Engineers: £60,000 – £70,000£5,000 referral bonusHybrid and flexible working arrangementsCareer progression and professional development and certifications Opportunities to engage in community tech and cyber initiativesInclusive culture valuing diversity, merit, and integrityWho Should ApplyThis role suits back-end or full-stack developers with Java, JavaScript, Node.js, Python, or C/C++ experience who want to make a tangible impact on national security. You should enjoy collaborating in Agile teams, mentoring others, and be eligible for UK security vetting.