Marek Klein
Technical Lead at comforte AG
Wiesbaden, Hesse, Germany
Summary
👤
Senior🎓
Top SchoolMarek Klein is a Technical Lead with 11 years of experience building and securing cloud and cryptographic systems from Wiesbaden, Germany. He blends low-level C/C++ crypto engineering with higher-level Java and .NET work, shipping mission-critical features for data-in-transit and at-rest protection. At comforte AG he leads teams while onboarding and mentoring engineers, maintaining a hands-on role in core server-side components and integration libraries. His academic work on privacy-preserving cloud processing and early projects implementing OpenSSL engines and HSM-backed providers underline deep expertise in applied cryptography. An active contributor to OpenSSL—adding ESSCertIDv2 support, HKDF demos and fixing OIDs—he has influenced a widely used security library beyond his day job. Colleagues describe him as a minimalist coder who treats code as art, pairing precision with pragmatic engineering.
11 years of coding experience
1 year of employment as a software developer
Information Technology, Information Technology at Tallinna TehnikaülikoolEngineer’s Degree, Applied Informatics - Security of Information Technologies, Engineer’s Degree, Applied Informatics - Security of Information Technologies at Slovak University of Technology in Bratislava
English, German, Slovak
Github Skills (12)
c1710
mtls10
ssl10
tls1210
c1110
tls1310
cryptography10
openssl10
libtls10
asn19
hkdf8
pkcs8
Programming languages (3)
Github contributions (5)
openssl/openssl
May 2021 - May 2021
TLS/SSL and crypto library
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 1 commit, 7 PRs in 1 day
Contributions summary:Marek primarily contributed to the OpenSSL library by implementing and modifying cryptographic functionalities. Their work included moving definitions, enhancing encoding of explicit text, and adding support for ESSCertIDv2, enhancing the library's time-stamping capabilities and general security aspects. The user also addressed an incorrect object identifier (OID) and integrated a demonstration for HKDF (HMAC-based Key Derivation Function). This demonstrates their focus on core cryptographic algorithms and low-level security implementations.
crypto-librarycryptographyssltlscrypto
kleinmrk/openssl
Jan 2016 - Sep 2022
TLS/SSL and crypto library
Contributions:58 pushes, 15 branches in 6 years 9 months
crypto-librarycryptographyssltlscrypto
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.