Senior Embedded C++ Engineer – Defence & Secure Systems

Owen Thomas B Corp; Crawley; Hybrid; GBP 85,000 - 105,000; Full time

Benefits offered by this job

Private Medical Insurance

Cycle & Tech Scheme

Employee assistance programme

Life insurance & Pension Scheme

Social atmosphere & team events

Flexible working (role dependent)

Job summary

ALTEN UK is seeking an embedded software engineer to design and maintain real-time C++ software for secure, high‑reliability communication systems. You will work across embedded platforms, ensuring robustness, determinism, and strong traceability in a regulated environment.

The role is based in Crawley with on-site work 4 days a week, requiring senior-level expertise and eligibility for UK SC clearance. A military background and experience with defence projects are advantageous.

Qualifications

• Bachelor’s or Master’s degree in Software Engineering, Computer Science, or a related discipline.
• Eligible to hold UK SC Security Clearance or already cleared.
• Experience with embedded C++ for high-reliability systems.

Responsibilities

• Design, implement, and maintain embedded C++ software for real-time comms and signal processing.
• Develop software for embedded communication modules and RF-adjacent components.
• Conduct debugging, optimisation, and performance testing on embedded targets.

Skills

C++ (embedded)

embedded debugging

performance optimisation

secure coding practices

requirements traceability

system-level testing

UK SC Clearance

Education

Bachelor’s or Master’s in Software Engineering/Computer Science

Relevant technical military background (or equivalent)

Tools

Linux kernel drivers

CI/CD tooling

model-based design

static analysis tools

Job description

ALTEN UK is seeking an embedded software engineer to design and maintain real-time C++ software for secure, high‑reliability communication systems. You will work across embedded platforms, ensuring robustness, determinism, and strong traceability in a regulated environment.

The role is based in Crawley with on-site work 4 days a week, requiring senior-level expertise and eligibility for UK SC clearance. A military background and experience with defence projects are advantageous.