React Native Development
Ship scalable React Native at AI speed
Work with Core Contributors who help shape React Native, not just use it. Move faster, dodge the pitfalls, ship to iOS, Android, and 10+ platforms from one codebase. Agents move the work forward. Experts make the calls.

Scale React Native without lowering the bar.
Core Contributors on your team
We hold 300+ commits to React Native. You get the people who shape the framework, embedded in your codebase within the first week.
One codebase, 10+ platforms
iOS, Android, web, tvOS, visionOS. We extended one app to 10+ platforms with 80% code reuse for a global TV brand.
Unblock stuck upgrades
Outdated versions, custom forks, broken native modules. We get you current on the New Architecture without stalling delivery.
The last 10%, polished
Layout shifts, animation glitches, accessibility gaps. We fix the device-specific details that delay launches, not just the happy path.
Knowledge that stays
We pair on features and architecture, transferring what we know so your team keeps shipping after we leave. Proof by doing, not slides.
You own everything we build
Modular architecture, scalable navigation, CI/CD, and tests, structured so your team takes over with confidence.
AI-native engineering
Agents scaffold features, refactors, and tests in parallel while our Core Contributors make the architecture calls. You ship more each sprint without lowering the engineering bar.
Built for enterprise scale
Architecture proven across 100+ enterprise projects serving billions of users for global brands, so it scales with your org, not against it.
Unblock your React Native team
Extra capacity, architecture support, or a path to more platforms. Tell us where you're stuck and we'll map the first move.

Scope → Build → Scale
Turn roadmap scope into shipped features.
Scope
We map your problem, align on deliverables, and define success metrics. No surprises once work starts.
Build
Engineers ship with AI-native workflows from sprint one. Code, decisions, and ownership, not discovery decks.
Scale
Expand scope, add platforms, or hand off to your team. The stack, tooling, and raised bar stay with you.
Case studies
What shipping at AI speed looks like
10 years of React Native → Now in your AI stack
Unblock your React Native team
Extra capacity, architecture support, or a path to more platforms. Tell us where you're stuck and we'll map the first move.
Why teams bet on Callstack
From billion-user apps to React Native core, this is why teams choose Callstack when they need to move fast and get it right.

10 years in React Native. Now shaping agentic engineering.
For a decade, we have helped define how teams ship with React Native. Now we are helping shape how they work with agents.
Founded in 2016 ·Backed by Viking Global Investors
React Foundation members. Core Contributors.
We are founding members of React Foundation and Core Contributors to React Native. You get direct access to people close to the decisions shaping the frameworks you use.
Open source since 2016. Our code runs in your app.
We contribute to React Native and maintain libraries across its ecosystem. Our code runs in apps used by millions of people every day.
39M+
Downloads / month67K+
GitHub stars300+
React Native commits100+ Enterprise clients with 7B+ users.
We work with teams shipping at real scale. You get a partner used to high-stakes products, not learning on your roadmap.


































Agent Conf. The conference for the Agentic era.
The conference we built for the shift from writing code to orchestrating agents.


We are Codex Ambassadors.
We run meetups, workshops, and hands-on sessions that help teams learn Codex and apply it in real work.

10 years in React Native. Now shaping agentic engineering.
For a decade, we have helped define how teams ship with React Native. Now we are helping shape how they work with agents.
Founded in 2016 ·Backed by Viking Global Investors
React Foundation members. Core Contributors.
We are founding members of React Foundation and Core Contributors to React Native. You get direct access to people close to the decisions shaping the frameworks you use.
Open source since 2016. Our code runs in your app.
We contribute to React Native and maintain libraries across its ecosystem. Our code runs in apps used by millions of people every day.
39M+
Downloads / month67K+
GitHub stars300+
React Native commits100+ Enterprise clients with 7B+ users.
We work with teams shipping at real scale. You get a partner used to high-stakes products, not learning on your roadmap.


































Agent Conf. The conference for the Agentic era.
The conference we built for the shift from writing code to orchestrating agents.


We are Codex Ambassadors.
We run meetups, workshops, and hands-on sessions that help teams learn Codex and apply it in real work.
Let’s find the right path
for your product.
Whether you’re planning new work or unblocking an existing product, we’ll help you choose the right path forward.
Can you join our team mid-project?
Yes. We frequently embed with existing teams at any stage of the project, whether you're launching, scaling, or stabilizing an app.
How do you typically work with in-house developers?
We pair program, review architecture, and take ownership of high-impact tasks, while supporting your team’s decision-making and knowledge growth.
Can you help stabilize a team that’s moving too slowly?
Yes. We help identify bottlenecks in process, code, or roles, and work with you to refactor, unblock, or redistribute ownership across the team.
What if our team isn’t sharing enough code across platforms?
We help strike the right balance between code sharing and platform-specific behavior, so you can move faster without compromising UX.
How fast can you get started?
We’re used to joining active codebases quickly and productively, most teams see impact within the first week.
Can you help us polish the last 10% of the app before release?
Definitely. We focus on the overlooked details, layout bugs, accessibility gaps, inconsistent animations, and device-specific issues that delay launches.
How do you use AI without lowering the engineering bar?
Agents scaffold features, refactors, and tests in parallel while our Core Contributors make the architecture calls. You ship more each sprint, with experts owning every decision that matters.
Can you get us unstuck on a stalled React Native upgrade?
Yes. Outdated versions, custom forks, broken native modules, we get you current on the New Architecture without stalling delivery.
Unblock your React Native team
Extra capacity, architecture support, or a path to more platforms. Tell us where you're stuck and we'll map the first move.
We had been struggling with React Native application performance until we met Callstack.
Huỳnh Chí Hùng
Associate Director / MOMO
Open Source
Want to build it on your own?
We open-source the tools behind our delivery model.
Use them, fork them, or let us run them for you.
Insights
Worth your time, by engineers.

Mobile Module Federation with Re.Pack: When Runtime Delivery Is Worth the Complexity

Less Boilerplate, More Type Safety: React Navigation 8's Typed Hooks

Keeping Screens Visible With <Activity mode="hidden">

Building Apps Where AI Generates the UI

Sparkling: The Missing App Layer for Lynx.js?

A Practical Guide to React Native Monorepo With Yarn Workspaces

Bringing CSS Clipping to React Native

How to Cleanly Swap Between React Native Storybook 10 and Your App

Integrating Swift Package Manager With React Native Libraries

Exploring Lynx JS: From Quick Start to CLI Workflows

Using Expo Libraries on Horizon OS: A Guide to Compatibility

Getting Started With Expo on Meta Quest

Bridging Animated.Value and SharedValue in React Native

Debugging Android Connectivity Issues with Metro Bundler

How to Use Liquid Glass in React Native

React Native Enterprise Framework is now Rock

Introducing Rozenite: A Plugin Framework for React Native DevTools

Performant and Cross-Platform Shimmers in React Native Apps

New in Re.Pack 5.1: Preloading Remotes, Runtime Hooks, and Faster Startups

Re.Pack 5: Mobile Microfrontends, 5x Faster, Less Configuration

Your Next React Native App Will Still Be Done With Paper (2.0)

Your React Native Offline Tool Belt

Why Is It Worth to Automate Your Dependency Management with `Autolinking`?

Typed Redux

Type-Checking React and Redux (+Thunk) With Flow - Part 2

The Complete Developer Guide to React 19, Part 3: Upgraded Support

The Story of Rewriting React-Native-Opentok and the Challenges Encountered

The React Native CLI Has a New Home

The Power of GraphQL Directives

The Complete Developer Guide to React 19, Part 1: Async Handling

Sweet Render Hijacking With React

Setting Up Notifications With AWS Amplify Gen 1

Solving Swift Modular Header Issues in React Native for Good

Shaping the Future of Super Apps in React Native

Setting up React Native Monorepo With Yarn Workspaces

Sending Events to JavaScript From Your Native Module in React Native

Receiving a Live Stream With Amazon IVS in React Native

ReanimatedArc - Build Circular Animated UI Elements in React Native

Releasing React Native 0.63.1

React Native: Handling Language Changes on Android the Right Way

React Native and Native Modules: The Android SyncAdapter

React Native Paper 5.0 - What’s New?

React Native Paper 4.0 - What’s New?

React Native CLI 3.1.0 and 4.0.0 - What's New?

React Native Animations Revisited - Part III

React Native Animations Revisited - Part II

Make a React Hook out of Your Native Module

Manage Async Code Like a PRO With RxJS

Introducing the OMH Cloud Storage Module

Introducing React-Native-iOS-Kit

Introduction to the React Native OMH Maps Library

Implementing Code Splitting in React Native with Re.Pack

How to Use Module Federation With Re.Pack 3

How to Build a Chrome Extension: A Step-by-Step Guide

How to Make Mobile Payment in a React Native App With Stripe and Expo in 15 Minutes

How to Debug Faster and Better with Flipper

How to Create a Universe in React VR

How Can React Native Paper Help Startups and Enterprises?

How Did Gutenberg Change Content Creation With React Native?

How Is Linaria Different From Emotion and Styled Components?

Exposing SwiftUI Views to React Native: An Integration Guide

Grow Your Business With React Native SDK Wrapper

Getting Started With ReasonML and React Native

From Native to Multiplatform Development: Unpacking Kotlin and Compose

ECMAScript ES8 and Beyond

Develop React (Native) Apps Like a PRO

Custom Screen Transitions in React Navigation

Color Your Apps in React Native Using Material Palette

Building Component Libraries for React Native Apps

Challenges and Opportunities of Building React and React Native Apps - Discussion With Wix.com

Android Drawer and StatusBar Done Right for React Native

Announcing React Native for Apple Vision Pro

Announcing React Native Tab View 2.0

Announcing Rebolt

Amazing React Native Apps with Apollo React

Adding an Example App to Your React Native Library

A Successful Cooperation With a Client Doesn't End at Software Development

Open Mobile Hub: Non-GMS and Cross-Platform Possibilities

Module Federation






















































































