Grzegorz Nosek
Industrial Cleaning Manager at Derrycourt Cleaning Specialists
Cork, Ireland
Summary
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RockstarGrzegorz Nosek is an Industrial Cleaning Manager based in Cork with 26 years of hands-on experience blending operations leadership and mechanical engineering know-how in facilities services. He pairs practical management skills—scheduling, team supervision and communication—with a rare software systems background, having contributed to low-level, performance-sensitive open source projects like sysdig and falcosecurity/libs. His technical work includes kernel- and eBPF-level tracing improvements, a performance-refactored nginx load‑balancer module, and robust FastCGI tooling, reflecting deep comfort with systems programming and reliability. That combination of shop‑floor operational leadership and kernel-space engineering gives him a pragmatic, systems-oriented approach to problem solving and process optimization. Colleagues describe him as detail-focused and resilient, able to translate field constraints into stable, maintainable technical and operational solutions.
26 years of coding experience
Github Skills (32)
fastcgi10
algorithms10
docker10
posixct10
apidoc10
load-balancing10
kernel-module10
c-programming10
c1110
linux-kernel10
containerization10
dockers10
c1710
system-calls10
api10
Programming languages (9)
Github contributions (5)
gnosek/nginx-upstream-fair
Oct 2007 - Apr 2012
The fair load balancer module for nginx
Role in this project:
Back-end Developer
Back-end DeveloperContributions:63 commits in 4 years 6 months
Contributions summary:Grzegorz's primary contribution involved developing and refactoring the load-balancing logic for the nginx module. They implemented shared memory management using nginx's primitives, and then rewrote the core load balancing algorithm to improve performance and reliability. The user also incorporated features such as weight-based load balancing, and added a status handler for monitoring the upstream servers. Their work significantly enhanced the module's functionality and stability.
nginxmonitoringload-balancerbalancer
gnosek/fcgiwrap
Mar 2007 - Apr 2015
Simple FastCGI wrapper for CGI scripts
Role in this project:Back-end Developer
Back-end DeveloperContributions:47 commits, 3 PRs, 4 pushes in 8 years 2 months
Contributions summary:Grzegorz primarily contributed to the core logic of the `fcgiwrap` project, focusing on improving its robustness and security. Their work involved refactoring the code for better structure and readability, optimizing file permission handling, and implementing environment variable management for CGI processes. Additionally, they addressed issues related to CR/LF handling in headers and improved overall system stability. The user also added support for preforking and binding to a socket.
cgipythonfastcgi
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