Oskar Kwaśniewski is co-founder and CTO of TesterArmy, a Y Combinator company. He has contributed extensively to React Native with over 100 merged pull requests and created multiple open-source libraries. He has worked with companies including Vercel, Meta, and AT&T.
Intro paths
YC
Oskar went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.
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In turn, Oskar can intro founders to TesterArmy's investors below.
TesterArmy's investors · 1
Co-founders
Szymon Rybczak· Founder