Where does Szymon Rybczak work?

Szymon Rybczak is Founder of TesterArmy.

What companies did Szymon Rybczak found?

Szymon Rybczak founded TesterArmy.

Szymon Rybczak

Founder

Founder at TesterArmy

San Francisco, California, United States

FoundedTesterArmy · YC

Find your path to Szymon

10,163 people in our graph share verified history with Szymon — schools, employers, funds. One of them is your warm intro.

Mauricio OrtizunlockedSzymon: together at YC X26 (2026)

×11Szymon: together at Y Combinator

About

Szymon Rybczak is co-founder and CEO of TesterArmy. He has contributed to React Native and maintained open-source libraries, and previously worked on v0 iOS with Vercel.

Founder at TesterArmy YC X26

Intro paths

Szymon went through Y Combinator (Spring 2026) — any YC alum in your network can reach them through the YC community.

Their group partner at YC was Pete Koomen, General Partner at Y Combinator — the partner who ran TesterArmy's batch and knows the company first-hand. YC profile ↗

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In turn, Szymon can intro founders to TesterArmy's investors below.

TesterArmy's investors · 1

Y CombinatorSan Francisco · $500K checks · since 2026

Co-founders at TesterArmy

Oskar KwaśniewskiFounder

Experience

TesterArmy (YC P26)Co-Founder & CEOcurrent2026 — presentRejon Zatoki San Francisco
CallstackSenior React Native Developer2022 — 2026
MyMusicReact Native Developer2021 — 2022
LiveKidMobile Developer2021Cracow, Małopolskie, Poland

Frequently asked questions

Who is Szymon Rybczak?: Szymon Rybczak is co-founder and CEO of TesterArmy. He has contributed to React Native and maintained open-source libraries, and previously worked on v0 iOS with Vercel.
Where does Szymon Rybczak work?: Szymon Rybczak is Founder of TesterArmy.
What companies did Szymon Rybczak found?: Szymon Rybczak founded TesterArmy.