Cryptographic Systems & Security Engineer

Integrasys S.à r.l. 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:

• Build tools that discover and assess cryptographic implementations across networks, radios, and embedded devices.

• Evaluate implementations against evolving national and NATO/EU compliance standards.

• Work on European next-generation communication systems in defence & space.

Requirements:

• 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.

• 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).

• Work Authorization: Must have a valid work permit for the EU.

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.

• Work-Life Balance: Hybrid work model (80% onsite / 20% remote) in Luxembourg.

• Competitive Package: Attractive salary aligned with your experience in a collaborative, international environment.Excellent verbal and written communication skills