Senior Embedded C++ Engineer - Defence & Secure Systems

Alten; Crawley Down; On-site; GBP 75,000 - 110,000; Full time

Benefits offered by this job

Private Medical Insurance

Cycle & Tech Scheme

Employee assistance programme

Life insurance & Pension Scheme

Social atmosphere & team buildings

Flexible working (role dependent)

Job summary

ALTEN is seeking an accomplished embedded software engineer to develop C++ for high-reliability defence communication and signal-processing systems. You will work across embedded platforms demanding robustness, security, and deterministic performance, contributing to secure and mission-critical operations.

The role requires senior-level expertise (8+ years) with on-site presence in Crawley and eligibility for UK SC security clearance.

Qualifications

• Bachelor’s or Master’s degree in Software Engineering, Computer Science, or related discipline or relevant military background with equivalent experience.
• Must be eligible to hold UK SC Security Clearance.
• Experience with embedded C++ in defence or high‑reliability systems is advantageous.

Responsibilities

• Design, implement, and maintain embedded C++ software for real-time communication and signal-processing systems.
• Develop and support software for embedded communication modules, modems, and RF-adjacent components.
• Conduct debugging, optimisation, and performance testing across embedded targets.
• Produce clear design specifications, requirements, and documentation per regulated development practices.
• Ensure secure coding standards and governance are followed.
• Support integration with wider engineering teams and participate in architecture reviews.

Skills

Embedded C++

Communications systems

Embedded debugging

Performance optimization

Secure coding

Traceability

Education

Bachelor's or Master in Software Engineering/CS

Tools

Linux kernel drivers

CI/CD tooling

Model-based design

Job description

ALTEN is seeking an accomplished embedded software engineer to develop C++ for high-reliability defence communication and signal-processing systems. You will work across embedded platforms demanding robustness, security, and deterministic performance, contributing to secure and mission-critical operations.

The role requires senior-level expertise (8+ years) with on-site presence in Crawley and eligibility for UK SC security clearance.