Job Title

Location: Bristol, On-site, 5 days per week (due to project classification) Salary: Up to 65,000 + bonus & excellent benefits Clearance: British Citizen or Dual UK National with British citizenship Copello are working with a leading defence technology partner seeking a Principal Software Engineer to join their New Product Development team, driving the next generation of mission planning and control systems . The Role Youll lead the design and delivery of complex software solutions across the full development lifecycle, collaborating with international teams and mentoring engineers within a dynamic, high-performing environment. What Youll Bring Strong proficiency in Core Java and/or C++ Proven experience delivering complex software systems end-to-end Solid understanding of the software development lifecycle Strong communication skills and stakeholder engagement experience Experience mentoring and developing junior engineers Benefits Include Up to 2,500 annual bonus (performance-based) Pension up to 14% combined contribution Flexi leave (up to 15 extra days) Enhanced parental leave Paid overtime and flexible working arrangements Excellent on-site facilities including subsidised meals and free parking TPBN1_UKTJ