Principal Software Engineer
Copello
Overview
In this role you will own the end-to-end software lifecycle for secure, mission-critical products in a defence environment. You’ll lead embedded and/or application software development, shaping architecture with cross-functional teams and mentoring engineers. You will drive robust testing, modern engineering practices, and technical reviews to deliver reliable, scalable solutions. This position offers hands-on impact, technical growth, and the chance to influence secure software at scale.
Pay / Benefits- bonus
- private medical
- enhanced pension
- 25 days' holiday + bank holidays
- flexible benefits
- potential early Friday finish
- Design and develop embedded and/or application software
- Use C/C++ across bare-metal, RTOS, and Linux environments
- Apply Object-Oriented Design and SOLID principles
- Support software architecture, requirements, and technical design
- Advocate TDD/BDD, CI, DevSecOps, and automated testing
- Collaborate with Systems, Hardware and Firmware engineers
- Lead technical reviews and contribute to engineering decisions
- Mentor less experienced engineers
- Contribute to technical proposals, bids, and future product development
- Drive improvements in software tools, processes, and engineering practices
- Strong C/C++ experience
- Significant embedded software development experience
- Experience with bare-metal, RTOS and/or Embedded Linux
- Strong understanding of SDLC and best practices
- Experience with Object-Oriented Design and Design Patterns
- Strong testing and design-for-test experience
- Experience in complex or regulated environments
- Knowledge of Rust, TCP/IP, MISRA, DevSecOps, CI/CD, DOORS, UML, SysML or Enterprise Architect would be advantageous
- Mentoring and coaching
- Technical leadership
- Collaborative cross-functional collaboration
- C/C++
- Embedded software development
- Bare-metal/RTOS/Embedded Linux
Reference: WJ-747_31290325 · Posted 12 Nov 2026, 10:40 AM