Lukasz Jernas
Senior Software Engineer at Allegro
Greater Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolŁukasz Jernas is a Senior Software Engineer with 23 years of experience building reliable systems and services, currently driving engineering work at Allegro from backend to UI. He is proficient in Kotlin, Java, and Python and brings strong database and Linux administration skills (PostgreSQL, MySQL, server ops) from a long career that evolved from NOC and monitoring roles into full-stack development. An active open-source contributor, Łukasz has improved internationalization and UI polish for SparkleShare and helped enhance Backstage developer portal features and docs, showing attention to developer experience and localization. His background in early Linux distribution development and hands-on monitoring/ops gives him a practical systems-first perspective that informs scalable, maintainable code.
22 years of coding experience
10 years of employment as a software developer
Bachelor of Engineering Information Technology, Bachelor of Engineering Information Technology at Collegium Da VinciSoftware Development, Software Development at Poznan University of Technology
English
Github Skills (19)
typescript10
internationalization10
user-interface10
backstage10
localization10
gtk10
front-end-development10
web-developer10
typescript-types10
portal10
i18next10
typescripts10
react10
javascript9
csharp9
Programming languages (20)
Github contributions (5)
hbons/SparkleShare
Jun 2010 - Nov 2011
Share and collaborate by syncing with any Git repository instantly. Linux, macOS, and Windows.
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:306 commits in 1 year 5 months
Contributions summary:Lukasz primarily focused on improving the user interface and internationalization aspects of the SparkleShare application. Their work involved refactoring and updating the UI strings using string formatting to ensure proper translation, and adding logic to handle different languages and regions through the use of i18n. Furthermore, the user contributed to the Nautilus extension by integrating it into the build system.
hacklanglibgit2sharingcollaborationcollaborate
backstage/backstage
Jul 2024 - Mar 2025
Backstage is an open framework for building developer portals
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:39 reviews, 18 PRs, 49 comments in 8 months
Contributions summary:Łukasz Jernaś primarily contributed to the Backstage developer portal, focusing on both frontend and backend improvements. His work involved fixing typos and standardizing TechDocs casing in doc strings. He also implemented features related to user settings, including searching for user avatars within entities and updating the user profile card. Further contributions involved refining the codebase and merging updates to align with the project's ongoing development.
portalsinfrastructureopen-platformdxbackstage
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