React Universe Meetup, San Francisco
React Universe Meetup series is a Unique community of innovators, builders & creators
React Universe Meetups are events designed to engage with the Community. Every meetup is the opportunity to connect with React and React Native professionals, learn about the latest industry trends, and gain insights at the intersection of technology and business. Our speakers are experts in their fields, and they'll share their experiences, challenges, and successes with you.
Event details
📆 Date: Thursday, April 24, 2025
⏰ Time: 5:30 - 9:00 pm (PDT)
📍 Location: Expensify Office, 88 Kearny St 16th Floor, San Francisco, CA 94108, USA
Agenda
5:30 PM – Doors open
6:00 PM – Intro and special announcement by Mike Grabowski
6:20 PM – Native Apps Without a Build Step (Michał Pierzchała)
If you’ve worked with React Native, you’re probably familiar with the complexity of Android and iOS build tools like Xcode, Gradle, Cocoapods, and CMake. The lengthy build times can also be a real chore. But with React Native, we’re mostly editing JavaScript files, so why do we need to rebuild our apps over and over again, either locally or on a CI server, which gets expensive quickly with macOS runners?
In this talk, I’ll show you the new React Native framework we’ve built for this use case (among others), which will allow you to skip the builds most of the time and reuse them across CI jobs for building, testing E2E, and dev environments.
6:45 PM – Q&A Session
7:00 PM – Talk by Expensify (details TBA)
7:30 PM – Networking time
How to join
🎟️ Please register to attend in person or access the exclusive livestream using the form above.
meet THE speakers

Mike Grabowski
CTO & Founder at Callstack

Michał Pierzchała
Principal Engineer at Callstack
