Hasan Çalişir
Senior System Architect at PSAUXIT
Istanbul, Istanbul, Turkey
Summary
👤
Senior🎓
Top SchoolHasan Çalişir is a Senior System Architect based in Istanbul with nine years of hands-on experience building and operating resilient Linux infrastructure and automation at scale. As co-founder of PSAUXIT and an official Gentoo developer/maintainer, he combines production-grade systems administration with open-source package stewardship across security and networking toolchains. He is fluent in Bash and Python, routinely converting legacy Korn shell libraries to portable Bash, automating middleware deployments (TIBCO, Apache, ELK) and orchestrating multi-wave data center migrations. His background spans HPC, high-availability services, load-balancing and penetration testing, giving him a rare blend of performance tuning, security-minded engineering, and operational pragmatism. Known for documentation and community collaboration, he maintains numerous Gentoo packages for security scanners and DNS tools, reflecting a commitment to reproducible, upstream-friendly solutions.
9 years of coding experience
6 years of employment as a software developer
Matematik, Matematik at Halit Armay Süper LisesiLisans Derecesi, İktisat, Lisans Derecesi, İktisat at Uludağ University-Economics
English
Github Skills (81)
moodle10
python10
anti-bot10
npp10
authentication10
security10
dns10
monitoring10
multicore10
linux10
control-panel10
golang10
management10
ids10
intrusion-detection10
Programming languages (8)
Github contributions (5)
psaux-it/nginx-fastcgi-cache-purge-and-preload
Dec 2022 - Mar 2025
Nginx Cache Purge & Preload for Wordpress
Contributions:14 releases, 40 PRs, 1284 pushes in 2 years 3 months
cachefastcgi-cachenginxnppphp
hsntgm/gentoo
Mar 2019 - Jul 2022
The Gentoo ebuild repository mirror
Contributions:3071 pushes, 88 branches, 1 comment in 3 years 4 months
ebuildgentoorepository-mirrorebuild-repository
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