Searchability NS&D
Oct 23, 2026
Full time
PRINCIPAL SOFTWARE ENGINEER - eDV CLEARED NEW PERMANENT OPPORTUNITY AVAILABLE IN LONDON FOR AN eDV CLEARED PRINCIPAL SOFTWARE ENGINEER Salary: Up to £120,000 + Clearance Bonus Location: London Clearance: Active eDV clearance required for high-side IT access Type: Permanent To apply, email: I'm currently working with a leading technology organisation operating across National Security and Defence, who are looking for an experienced Principal Software Engineer to join their growing engineering function. This is a senior technical leadership position where you'll be working on complex, mission-critical systems, taking ownership of technical delivery across multiple teams and helping shape solutions that have a genuine impact. THE ROLE As a Principal Software Engineer, you'll act as a senior technical authority, working closely with engineering teams, technical leads, customers and external partners. You'll be responsible for: Taking ownership of deliverables across multiple engineering teams and defining technical approaches to meet customer requirements. Acting as a key technical point of contact for your area of responsibility. Working with senior customers and external partners, coordinating technical activity across organisations. Providing technical leadership, mentoring engineers and supporting the development of engineering capability. Contributing to technical architecture, design, development and delivery planning. Helping teams overcome complex technical and delivery challenges. WHAT WE'RE LOOKING FOR We're looking for an experienced Software Engineer who has progressed into a senior/principal-level technical leadership role. You'll ideally have strong experience across one or more of the following: Backend: Java, Spring Boot, Maven and/or Python Frontend: JavaScript, TypeScript, React and npm Designing, developing and deploying scalable software systems. DevOps and CI/CD practices. Containerisation technologies including Docker and Kubernetes. Cloud technologies, ideally AWS. Agile software development environments. Leading, mentoring or providing technical direction to other engineers. Strong communication and problem-solving skills are essential, alongside the ability to work with both technical and non-technical stakeholders. WHY JOIN? You'll be joining an organisation working on highly sensitive, technically challenging projects where your work will directly contribute to critical national security capabilities. Alongside a salary of up to £120,000, the role offers a strong benefits package including: Flexible working options, including a compressed fortnight. Private healthcare. Cash health plan. Holiday purchase/sell scheme. Performance-based bonus opportunities. Specialist training and career development programmes. A range of wellbeing, financial and lifestyle benefits. Relocation assistance may be available. SECURITY CLEARANCE You must currently hold an active eDV clearance to be eligible for the high-side IT access required for the position. If you're an experienced Software Engineer, Senior Software Engineer, Lead Engineer or Principal Engineer with active eDV clearance and you're interested in working on genuinely mission-critical technology, I'd be keen to speak with you. Apply now or get in touch for a confidential discussion.