C/C++ Developer


Most of our jobs are open to a 4 day work week (i.e. 32hrs @ 80% salary). We also offer flexible working hours.

  • 4 x 8hr days
  • 80% salary
  • Hybird Remote, Tubize
  • Offers relocation

Only considering candidates eligible to work in Tubize, Belgium ⚠️

Location: Tubize, Belgium

Thales people architect solutions at the heart of the defence-security continuum. Interoperable and secure information and telecommunications systems for defence, security, and civil operators, are based upon innovative use of radiocommunications, networks, and cybersecurity. We are ground breaking new digital technologies such as 4G/5G mobile communications, cryptography, cloud computing and big data for use in physical protection systems, and critical information systems.

Thales Belgium SA, Belgium competence center of Thales, is a company located on 2 sites, one in Tubize (near Brussels) and the other one in Herstal (near Liège). Thales Belgium, which employs more than 280 collaborators, is specialized in the design, development and supply of critical information systems for customers in the sectors of Defense, Security (including Cyber) and Aerospace.

In this context, we are looking for a:

Medior C/C++ Developer


As a Medior Software Engineer, you will join the aero team for the FCAS program.

You will develop using the newest features and development techniques.

Main Responsibilities:

As Medior Software Engineer, you will be responsible for:

  • Technical design and implementation of applications
  • Application management in an Agile development practice
  • Software design and working with architects
  • Participate in the entire development process
  • Writing and execution of tests (unit, functional/functional, integration, etc.), and automating them, if possible.
  • Resolve incidents/root cause analysis in collaboration with teams
  • Monitoring the life cycle of the different applications linked to the domain's activity.
  • Write consumable documentation for sustainable knowledge management.
  • Mentor and coaching of younger colleagues
  • Peer review of code and architecture


  • You have a Bachelor's or Master's degree in IT orientation or equivalent experience.
  • You have at least 3 years of experience as a C/C++ developer.
  • You want to get involved in a company project strongly oriented towards collective intelligence and self-management.
  • You will be able to be autonomous.
  • You have experience in most of the following technical areas:
  • Linux as dev and target env (knowledges about yocto is a plus).
  • Unit testing/mocks, continuous integration, code versioning (Git), Agile…
  • PKI, TLS and secure communication in general
  • Network Protocols (TCP/UPD,…)
  • Code benchmarking and performance optimization
  • Knowledge in the following technologies is a plus:
  • Knowledge in embedded is a plus but not necessary (STM32, FPGA, ...)
  • Concurrent, multi-threaded programming, and distributed systems
  • Secure coding
  • Rust (or you are eager to learn it)
  • Full professional proficiency in English. French and/or Dutch is a plus.

At Thales we provide CAREERS and not only jobs. With Thales employing 80,000 employees in 68 countries our mobility policy enables thousands of employees each year to develop their careers at home and abroad, in their existing areas of expertise or by branching out into new fields. Together we believe that embracing flexibility is a smarter way of working. Great journeys start here, apply now!


Apply now! Click on the button below to upload your profile and show your interest.

Diversity Statement

We actively support a working pattern that suits your lifestyle and helps you reach your ambitions. That means that equal opportunities, inclusion and an informal culture are integral to our success. It also means that your well-being and happiness matter to us! That’s why we offer you the flexibility to do what’s important to you; whether that’s part time hours, job sharing, remote working, or the ability to flex your start and finish times.


A global technology leader in defense, aerospace, security, and transportation.

Working Week

Most of our jobs are open to a 4 day work week (i.e. 32hrs @ 80% salary). We also offer flexible working hours.

  • Mon
  • Tue
  • Wed
  • Thu
  • 🏖️

Our Vacation Policy

Vacation varies by role but for many countries we offer 40 days of paid time off annually.

  • 40 days PTO
  • 52 unpaid Fridays
  • 92 days off per year

Remote Working Policy

Most employees work hybrid remotely, working from home per week.

Company Benefits

  • Health insurance
  • 401(k) company contribution
  • Flexible working hours
  • Generous parental leave
  • Dentalcare
  • Company retreats
  • Equipment allowance
  • Life & Disability Insurance
  • Yearly bonuses
  • Mental Health Support

Our Team

We're a team of 77k across 19 departments:

  • engineering
  • sales
  • business development
  • information technology
  • support
  • human resources
  • finance
  • operations
  • consulting
  • +10 more teams

Desirable Skills and Experience

  • C
  • C++
  • Rust
  • Technical design
  • Application management
  • Agile development
  • Software design
  • Unit testing
  • Functional testing
  • Integration testing
  • Root cause analysis
  • Mentoring
  • Code review

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