Freelance Security Engineer — Post-Quantum & Applied Cryptography

2/2026 – offen

Security reviews of DEX and DeFi protocols before trading capital is exposed: 30+ protocol onboarding evaluations covering smart-contract review, security analysis and risk scoring for trading desks.

Weekly on-call incident handler, triaging and closing roughly 200 security incidents per month using SOAR and detection tooling.

Evaluated and integrated on-chain monitoring, anomaly-detection and smart-contract auditing tooling; hardened smart-contract and node deployments together with trading and engineering teams; set the security policy for internal AI tooling.

Technologies: threat detection, incident response, SOAR, on-chain monitoring, smart-contract auditing, DeFi security, application security, Python.

IT Sicherheit (allg.), Kryptographie, Incident-Management

8/2025 – 12/2025

Implemented hybrid classical-quantum cryptographic protocols combining quantum random number generator (QRNG) entropy with NIST post-quantum algorithms (ML-KEM, ML-DSA).

Validated entropy quality against NIST SP 800-22 and SP 800-90B using TestU01 and Dieharder, and built an HMAC-DRBG profiler aligned with NIST SP 800-90A for cryptographic key generation.

Remote contract engagement.

Technologies: Python, NIST SP 800-22 / 800-90A / 800-90B validation, TestU01, Dieharder, QRNG, ML-KEM, ML-DSA, Git.

IT Sicherheit (allg.), Kryptographie, Python

9/2024 – 7/2025

Implemented a hybrid classical/post-quantum key exchange for the Neuropil protocol framework in C using liboqs, integrating ML-KEM (FIPS 203) and ML-DSA (FIPS 204) while preserving backward compatibility with existing X25519/Ed25519 nodes.

Benchmarked classical against hybrid builds on multi-node test clusters: quantified join-handshake overhead, isolated lattice-operation cost to under 1 ms and confirmed steady-state throughput was unaffected.

Verified byte-level conformance with FIPS 203/204 against the published test vectors and delivered the C implementation together with validation reports. The code is merged and running in pi-lar's production product.

Technologies: C, liboqs, ML-KEM, ML-DSA, hybrid protocol integration, performance benchmarking, Git.

C (Programmiersprache), Kryptographie