Senior Embedded Software Engineer

Company Description

ALTEN is a global engineering and technology consultancy operating across over 35 countries worldwide. We partner with industry leaders across sectors including Aeronautics, Aerospace, Defence, Naval, Automotive, Energy, Rail, IT and many more to deliver innovative engineering solutions that drive technological advancement & support sustainable transformation.

Our teams of passionate and agile engineers work on cutting-edge projects that shape the future of technology and sustainability. At ALTEN, we empower talented engineers to innovate, solve complex challenges, and deliver impactful solutions that build tomorrow’s world—today.

Join us and start building tomorrow’s world today!

Job Description

Join our team to develop embedded C++ software for high‑reliability communication and information‑exchange systems used in defence environments. You’ll contribute to next‑generation communication and signal‑processing technologies, working across embedded platforms that demand robustness, security, and deterministic performance. This role is ideal for an engineer experienced in embedded C++ who enjoys contributing to complex systems that underpin secure and mission‑critical operations.

Location:

Crawley
On‑site: 4 days per week
Seniority:
Senior (8+ years of experience)
Clearance:
Candidates must be willing and eligible to obtain SC clearance.

Key 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 to ensure reliability under operational loads.
Produce clear and traceable design specifications, requirements, and documentation aligned with regulated development practices.
Ensure adherence to secure coding standards, governance policies, and safety‑critical development procedures.
Support integration activities with wider engineering teams and contribute to architecture and design reviews.

Qualifications

Required Skills

Strong proficiency in C++ for embedded systems (C++11/14/17).
Experience in embedded development for communications or signalling systems (modems, radios, data links, or similar).
Familiarity with embedded debugging, performance optimisation, and hardware‑software interaction.
Understanding of secure coding practices, configuration management, and development governance.

Experience with requirements traceability, verification, and system‑level testing.

Soft Skills & Collaboration

Strong communication skills for cross‑discipline collaboration.
Ability to work rigorously within regulated environments.
Proactive, problem‑solving mindset with attention to detail.

Required Qualifications

Bachelor’s or Master’s degree in Software Engineering, Computer Science, or related discipline or  relevant technical military background with equivalent experience.
Must be eligible to hold or already hold UK SC Security Clearance. Desirable Skills

Experience with communication stacks, DSP concepts, or RF‑adjacent technologies.
Familiarity with embedded Linux or RTOS environments.

Experience with CI/CD tooling, model‑based design, or static analysis tools.
Background in defence, avionics, or secure‑systems engineering.

Additional Information

Why join us?

We bring together entrepreneurial, tech-driven people to deliver innovative solutions for leading companies.

At ALTEN, you’ll work on exciting projects, supported by ongoing learning, mentoring, and clear career development tailored to your goals.

Join a passionate team and help build tomorrow, today.

In short you get:

A personalised career path and a rewarding management style
A huge diversity of engineering projects and industries
Private Medical Insurance
Cycle & Tech Scheme
Employee assistance programme
Life insurance & Pension Scheme
Social atmosphere, regular gatherings & team buildings
Flexible way of working (role dependent)
We are proud to support the Armed Forces Covenant & actively encourage applications from members of the Armed Forces community, including veterans, reservists, service leavers, and military…