Oskar Kwaśniewski

Co-Founder & CTO @ TesterArmy (YC P26)

Co-founder

TesterArmy· Spring 2026 San Francisco Bay Area

in LinkedIn 𝕏 @o_kwasniewski

2026Co-founder· TesterArmy (YC P26)

Founder · since 2026

Company

TesterArmy (YC P26)

Role

Co-Founder & CTO

current

Stage

—

no public source

Raised

—

no public source

Based

San Francisco Bay Area

current

Founder / co-founder — the company's markEmployee / research role

Source: LinkedIn work history

Profile coverage5 of 7 · missing posts, contact

TesterArmy

Test your app with AI, catch bugs before users do

Spring 2026

Experience

Career

TesterArmy (YC P26)
Co-founder
Co-Founder & CTO · San Francisco Bay Area · 2026 – Present
2026
Callstack
Senior React Native Developer · 2022 – 2026
2022
MyMusic
React Native Developer · 2021 – 2022
2021
eTechnologie.pl - wykorzystaj potencjał Internetu!
Frontend Web Developer · Szczecin, Zachodniopomorskie, Poland · 2019 – 2021
2019

Bio

Co-founder & CTO of TesterArmy (YC P26). React Native Core Contributor (100+ PRs merged), created 5+ open-source libraries with over 2.5M downloads. Worked with Vercel, Meta, AT&T, and more.