Overview

Embedded Software Engineer, Outside IR35 – Hybrid working arrangement. Based in Bristol with occasional on-site visits. Role is on a secure, real-time software solution for advanced defence platforms including UAVs, Radar Systems and electronic warfare applications. Part of a multi-disciplinary engineering team delivering reliable, secure and performant software within strict safety and regulatory constraints.

Key Responsibilities

• Design, develop, and maintain embedded software for real-time systems (bare-metal and RTOS).
• Work on safety-critical and security-sensitive applications in compliance with MOD and NATO standards.
• Collaborate with systems, hardware, and test engineers to deliver robust software under stringent requirements.
• Implement and verify communication protocols (CAN, Ethernet, SPI, MIL-STD-1553, etc.).
• Develop documentation to support certification and audits (DO-178C, DEF STAN 00-55).
• Perform low-level debugging, performance tuning, and integration testing.
• Participate in formal reviews, risk assessments, and safety case support.

Required Skills and Experience

• 5+ years of embedded C/C++ development.
• Strong knowledge of ARM-based microcontrollers and real-time systems.
• Experience with RTOS (e.g. FreeRTOS, VxWorks, or INTEGRITY).
• Familiar with low-level hardware interaction, board bring-up, and peripheral control.
• Working knowledge of defence industry standards (e.g. DEF STANs, MISRA C).
• Ability to produce clear and maintainable technical documentation.
• Experience with DO-178C, DO-254, or ISO 26262 standards.
• Exposure to secure boot, crypto modules, and trusted execution environments.
• Familiarity with version control and CI/CD (Git, Jenkins, Bitbucket).
• Working knowledge of signal processing or control systems is a plus.
• Prior work with UK MOD, NATO, or Tier 1 defence contractors.
• Hybrid working: Remote with some on-site presence required for classified work (frequency depends on project phase).
• SC Clearance / Eligibility for SC Clearance.
• Dual Nationality is eligible.
• Contract Length: 12 Months (Potential to extend).

Company and Application Notes

CMC provide expert engineering solutions on an international capacity for advanced engineering projects. We are open to applications from persons of any age or experience. No terminology in this advert is intended to discriminate on the grounds of age or experience.