Cryptographic Systems

Cryptographic Systems & Security Engineer Defence & Space

Location:
Luxembourg (Hybrid: 80% Onsite / 20% Remote) Contract Type: Full-time, Permanent Are you eager to tackle the next generation of cybersecurity challenges at the intersection of defence, post-quantum cryptography (PQC), and satellite/tactical communications? Integrasys SARL is an innovative, international telecommunications software company specializing in solutions for satellite (SatCom) and terrestrial radio systems. We are expanding our team in Luxembourg to contribute to high-impact EU and NATO defence R&D initiatives. We are looking for a Cryptographic Systems & Security Engineer who thrives on understanding how cryptographic algorithms, network protocols, and software binaries interact across complex, multi-domain environments.

What you'll do
You'll help build tools that discover and assess cryptographic implementations across networks, radios and embedded devices, evaluate them against evolving national and NATO/EU compliance standards, and work on European next-generation communication systems. REQUIREMENTS
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Education:
Bachelor's or Master's degree in Computer Science, Cybersecurity, Computer Engineering, Mathematics, or a related field.
• Applied Cryptography: Solid grasp of applied cryptographic concepts (PKI, symmetric/asymmetric encryption, KEMs, digital signatures, key management).
• Network & Protocol Familiarity: Working knowledge of mainstream secure protocols (TLS, IPsec, MACsec, SSH) and network analysis tools (Wireshark, Scapy, PCAP parsing).
• Software Development: Strong practical proficiency in C/C++ and Python.
• PQC Awareness: Familiarity with NIST Post-Quantum Cryptography standards (ML-KEM, ML-DSA) and awareness of PQC migration challenges.
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Experience:
At least 2 years of relevant experience in cybersecurity, system security, network traffic analysis, or applied cryptography.
• Languages: Advanced English proficiency (spoken and written). DESIRABLE / NICE-TO-HAVE SKILLS
• Experience with reverse engineering tools or binary analysis frameworks (e.g., Ghidra, IDA Pro, Binwalk).
• Exposure to AI/ML applications in network traffic analysis or anomaly detection.
• Understanding of permissioned blockchain / distributed ledger technology (DLT) for secure auditing.
• Background or strong interest in tactical C2 systems, satellite communications (SatCom), or RF environments.
• Knowledge of NATO, EU, or national cryptographic compliance guidelines and profiles.

WHAT WE OFFER
• Direct Impact: Work on state-of-the-art defence and space projects defining the future of post-quantum security in Europe.
• Career Growth: Continuous professional development, certifications, and hands-on exposure to cutting-edge tools and frameworks.
• Work-Life Balance: Hybrid work model (80% onsite / 20% remote) in Luxembourg.
• Competitive Package: Attractive salary aligned with your experience, alongside a collaborative, international environment.