Agata Kosior
Senior React Native Developer
Poland
Summary
🤩
Rockstar🎓
Top SchoolAgata Kosior is a Senior React Native Developer based in Poland with nine years of front-end and mobile development experience, currently advancing cross-platform apps at Callstack. She progressed internally from React Native Developer to a senior role, bringing deep practical expertise in building production-grade React and React Native applications across consultancy and product teams. A recipient of a full Nanodegree scholarship from the Google Developer Scholarship Challenge, she combines formal perseverance with hands-on delivery. Her background includes multi-year stints at Mobile Reality and Spyrosoft, where she focused on user-facing performance and maintainable component architectures. Unusually for a senior developer, Agata began academic studies in medicine, reflecting a disciplined, analytical mindset that she applies to debugging and system design.
9 years of coding experience
5 years of employment as a software developer
Lekarz, Medicine, Lekarz, Medicine at Jagiellonian University
English, Polish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (36)
financial10
ios10
mobile-development10
react-native10
finance10
app-framework10
react-native-component10
cross-platform10
chat10
menu10
android10
mern10
mobile10
collaboration10
react10
Programming languages (9)
Github contributions (5)
koko57/ScoreBoard
Mar 2019 - Dec 2022
React Native scoreboard app📱
Contributions:6 PRs, 18 pushes, 2 branches in 3 years 8 months
react-nativereactscoreboard
koko57/App
Mar 2023 - Jul 2025
Welcome to New Expensify: a complete re-imagination of financial collaboration, centered around chat. Help us build the next generation of Expensify by sharing feedback and contributing to the code.
Contributions:908 pushes, 137 branches in 2 years 4 months
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