Lukasz Usarz
Senior React Native Engineer
Tarnow Metropolitan Area Poland
Summary
🤩
Rockstar🎓
Top SchoolLukasz Usarz is a Senior React Native Engineer with a decade of experience building efficient, scalable apps and shipping measurable business value. He blends mobile and full-stack skills—particularly Java, NodeJS and modern front-end work—and has a track record of improving developer experience through thoughtful refactors and testing improvements. His open-source contributions include refactoring high-profile JavaScript testing tools like Vue Test Utils and Karma, and meaningful maintenance on a decentralized finance desktop app (Bisq), showing attention to code quality and maintainability. Comfortable across startups and product teams in Europe and the US, he also brings hands-on experience in backend APIs, devops tasks and occasional Android development. Based in Tarnów, Poland, Lukasz pairs an academic background in applied computer science with a practical obsession for simplifying complex systems.
10 years of coding experience
10 years of employment as a software developer
Wyższa Szkoła Biznesu - National Louis University w Nowym SączuMaster of Science (M.Sc.), Applied Computer Science, Master of Science (M.Sc.), Applied Computer Science at AGH University of Krakow
Polish, English
Stackoverflow
195reputation
17kreached
4answers
7questions
Github Skills (31)
javascript10
testing10
test-runner10
gui-application10
javafx10
desktop-application10
java10
desktop10
javas10
component-testing10
vue10
refactoring10
vue-jsx10
k10
test-automation10
Programming languages (10)
Github contributions (5)
karma-runner/karma
Dec 2017 - Jan 2019
Spectacular Test Runner for JavaScript
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:52 commits, 76 PRs, 20 pushes in 1 year
Contributions summary:Lukasz primarily contributed to refactoring and improving the codebase, with a focus on modernizing JavaScript and related files, switching to ES2015 syntax. They addressed bugs by providing more detailed error information, which improved debugging. Furthermore, the user contributed to the project's core functionality by refactoring and improving the watch and formatters modules to improve the project's maintainability.
spectacularbrowsertestingjavascriptbdd
vuejs/vue-test-utils
Sep 2017 - Apr 2018
Component Test Utils for Vue 2
Role in this project:Front-end Developer
Front-end DeveloperContributions:7 commits, 18 PRs, 55 comments in 7 months
Contributions summary:Lukasz primarily focused on refactoring and optimizing the Vue.js test utility library. Their contributions include simplifying code, improving component testing, and refactoring existing methods for better performance and maintainability. The user made changes across multiple files, including core utility files and component-specific testing modules, demonstrating a good understanding of the library's structure. The work suggests a focus on code quality and developer experience within the context of testing Vue components.
vueutilsvue-2test-utilsvuejs
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