Heiko Schaefer
Freelance at Heiko Schaefer IT
Mannheim, Baden-Württemberg, Germany
Summary
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Senior🎓
Top SchoolHeiko Schaefer is a seasoned freelance software engineer with over 20 years of experience building backend systems, databases and secure, free-software environments from his base in Mannheim, Germany. He combines deep Unix/GNU Linux and *BSD system administration skills with extensive Java ecosystem experience and a current focus on Rust and OpenPGP tooling, including smartcard and PKCS#11 HSM integrations and work around openpgp-ca.org. Heiko has designed complex service-oriented architectures using both relational and NoSQL stores (notably CouchDB) and REST-based workflows, and brings practical security expertise to federation and distributed-system challenges. As an independent consultant since 2008, he pairs hands-on implementation with architectural analysis and optimisation, often in privacy-conscious or cryptographic contexts. An observant engineer, he blends long-term infrastructure stewardship with active interest in modern systems languages and hardware-backed keys.
20 years of coding experience
6 years of employment as a software developer
Diplom, Informatik (Softwaretechnik), Diplom, Informatik (Softwaretechnik) at Universität Stuttgart
English, German
Stackoverflow
341reputation
4kreached
6answers
8questions
Github Skills (116)
minecraft10
mechanics10
fabric10
gameplay10
esx10
paper10
high-performance10
spigot10
java10
anticheat10
bukkit10
discord-bot10
mineflayer9
azerothcore9
forge9
Programming languages (7)
Github contributions (5)
velnias75/NetMauMau
Oct 2014 - Apr 2020
Server for the popular card game Mau Mau (similar to UNO®)
Contributions:20 releases, 650 commits, 3 PRs in 5 years 6 months
azerothcoresimilarunodedicated-serverphp
velnias75/diskfit
Aug 2016 - Feb 2020
Contributions:2 PRs, 131 pushes, 8 branches in 3 years 7 months
calculatordiskfit
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