Przemyslaw Czaus
Software Engineer at OlSys.pl
Warmian-Masurian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolPrzemyslaw Czaus is a seasoned full-stack software engineer with 11 years of experience building scalable, secure web services and applications across PHP, Go, Java, C++ and more. He has led backend teams and projects at major publishers and currently contributes to high-scale systems at Fandom while running his own development studio, OlSys.pl. His open-source work includes backend contributions to notable projects like Wikia/app and the cloud-native identity platform Ory Kratos, focusing on sitemap optimization, auth flows and session management. Comfortable across the stack—from microservices and Kubernetes to embedded microcontrollers—he pairs hands-on engineering with practical team and project leadership. He holds advanced academic training in computer science and brings a pragmatic focus on reliability and high performance to every system he touches.
11 years of coding experience
11 years of employment as a software developer
Master's degree, Computer Studies, 5, Master's degree, Computer Studies, 5 at Uniwersytet Warmińsko-Mazurski w Olsztynie
Polish, English
Stackoverflow
51reputation
7kreached
1answer
2questions
Github Skills (27)
mediawiki10
sitemap10
back-end-development10
session-management10
sitemap-xml10
user-authentication10
authentication10
identity-management10
user-management10
php10
go10
xml-sitemap10
registrar9
database-migrations9
oid9
Programming languages (8)
Github contributions (5)
Wikia/app
Jan 2019 - Nov 2020
Wikia Application Code
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 reviews, 340 commits, 58 PRs in 1 year 10 months
Contributions summary:Przemyslaw primarily focused on back-end development tasks within the Wikia/app repository. Their commits show a focus on optimizing and refactoring the sitemap generation process, including creating new features to generate sitemaps and fixing related issues. They also implemented changes to improve redirect functionality, and they made fixes to handle special cases within the application's logic, which showcases their understanding of the codebase and related PHP/Mediawiki framework.
wikiphpwikiamediawiki
ory/kratos
Jul 2021 - Jun 2022
Headless cloud-native authentication and identity management written in Go. Scales to a billion+ users. Replace Homegrown, Auth0, Okta, Firebase with better UX and DX. Passkeys, Social Sign In, OIDC, Magic Link, Multi-Factor Auth, SMS, SAML, TOTP, and more. Runs everywhere, runs best on Ory Network.
Role in this project:Back-end Developer
Back-end DeveloperContributions:25 reviews, 20 commits, 7 PRs in 11 months
Contributions summary:Przemyslaw's commits primarily focus on bug fixes and new feature implementations within the Ory Kratos project, particularly concerning Facebook sign-in, session management, and admin recovery. The user has modified backend code related to OIDC, recovery tokens, and session refreshing, which required updates to database migrations. Furthermore, the user implemented changes that allow for wildcard domains for redirect_to checks and added capabilities to extend sessions. This suggests a focus on authentication and identity management backend aspects of the project.
yubikeyidpsignheadachesthink
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