Jan Koscielniak
Senior Software Engineer at Red Hat
Brno, South Moravia, Czechia
Summary
👤
Senior🎓
Top SchoolJan Koscielniak is a Senior Software Engineer at Red Hat with a decade of experience building and hardening cloud-native tooling and test automation. He combines hands-on Python development for container and OpenShift ecosystems with a strong DevOps habit—CI/CD, testing, and observability are central to his workflow. He mentors junior engineers and interns, helping teams adopt reliable engineering practices while driving measurable quality improvements. His open-source contributions include security-focused protocol testing—enhancing the tlsfuzzer suite with timing tests, refactoring, and docs—demonstrating attention to both robustness and maintainability. Based in Brno, he pairs formal training in information assurance with practical experience across roles from internships to senior engineering, making him comfortable across security, QA, and production delivery. Colleagues describe him as pragmatic: focused on elegant solutions that scale and on lifting others as projects mature.
10 years of coding experience
4 years of employment as a software developer
Bakalář (Bc.), Information Technology, Bakalář (Bc.), Information Technology at Brno University of TechnologyGymnázium Bystřice nad PernštejnemInženýr (Ing.), Computer and Information Systems Security/Information Assurance, Inženýr (Ing.), Computer and Information Systems Security/Information Assurance at Vysoké učení technické v Brně
English, German, Czech
Github Skills (15)
mtls10
testing-library10
test-framework10
test-suite10
tls1210
mstest10
python10
tls1310
ui-testing10
teste10
libtls10
testing10
test-automation9
automation9
automations9
Programming languages (14)
Github contributions (5)
tlsfuzzer/tlsfuzzer
May 2020 - Jun 2020
SSL and TLS protocol test suite and fuzzer
Role in this project:
QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:22 commits, 1 PR, 2 comments in 1 month
Contributions summary:Jan made several commits focused on enhancing and improving the existing test suite for SSL and TLS protocols. These changes included modifications to the timing tests, making dpkt a soft dependency, and refactoring of the log structure. They also added a new test example and documentation, demonstrating active involvement in test development and refinement.
security-vulnerabilitytesting-toolsdrowntlslitetest-automation
kosciCZ/operator-pipelines
Sep 2021 - Aug 2023
OpenShift Pipelines for Partner Operator Bundle certification
Contributions:24 pushes, 5 branches in 2 years
bundlepartneropenshiftoperatorkubernetes
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.