Senior Rust Developer

Office: Toulouse

Start date: ASAP

Contract: CDI

We are CYSEC, a fast growing European information security company based in Switzerland, France and Italy. 

We bring security solutions to protect sensitive information and datalinks, on Earth and in Space. We develop and offer three different innovative products securing:

• The space data link between the Ground Station and the Satellite [ARCA SATLINK]
• The satcom link providing internet connectivity to end users through satellites [ARCA SATCOM]
• IT execution environments on untrusted or third party infrastructures [ARCA Trusted OS]
  

We’re a team of engineers and software security experts, combining deep technical expertise with hands-on industry experience. Our mission is to deliver agile, cutting-edge security solutions tailored for even the most exotic infrastructures — and we're always ready to tackle the toughest challenges. As a proud multinational and multilingual team, we believe that true innovation and excellence are driven by diversity and inclusion. Join us in shaping the future of cybersecurity.

Find out more at: www.cysec.com

Context

ARCA SATLINK is a two-part solution — ARCA SATLINK Ground and ARCA SATLINK Space — designed to secure communications between ground stations and satellites. It leverages the state-of-the-art CCSDS Space Data Link Security Protocol to protect space data links.

With the rapid growth in satellite deployments, securing telecommands, telemetry and payload communications has become more critical than ever. In this role, you’ll contribute to the development of advanced cryptographic software that safeguards the data exchange between satellites and ground infrastructure.

Your Mission

Join us in contributing to the development of the Ground component of our ARCA SATLINK solution.

What We’re Looking For

Are you an experienced Rust developer with a passion for space and security? Are you motivated, result-driven, and excited by the opportunity to bring innovation to the fast-evolving space ecosystem? If so, we want to hear from you.

Your skillset:

Core proficiency:

• Rust

Comfortable with:

• Git
• HashiCorp Vault or OpenBao
• PostgreSQL
• Docker

Nice to have:

• Knowledge of applied cryptography (encryption, authentication, key distribution)
• Background in embedded systems, particularly in space-focused deployments
• Experience with security assessments or threat modeling

If you're ready to take your skills to orbit and help shape the future of secure space communications, this role is made for you.

Work environment & your Team

You'll be joining a team of passionate engineers with a strong background in security and software development. Collaboration, curiosity, and a problem-solving mindset are at the core of how we work. We're deeply committed to delivering high-quality, secure solutions — and we do it together, supporting each other every step of the way.

At the same time, you’ll be in an environment that encourages continuous learning, hands-on experience, and meaningful contributions to impactful projects.

Our office is based in the heart of Toulouse, easily accessible by public transport and surrounded by delicious lunch spots and after-work hangouts — making it a vibrant and enjoyable place to work.

How to apply ?

Send us your CV and motivation letter.

We will get back to you for the next steps.