End-to-End Product Development

Ship every platform from one codebase.

We take full ownership of your product, from architecture to release. One senior AI-native team builds and ships it end to end, so you get to market faster with less delivery complexity.

Book consultationExplore services

Trusted by 100+ Enterprise clients

Why build with Callstack

Launch once across every platform.

One senior AI-native team owns architecture, development, QA, CI/CD, and release across product surfaces. You reach market faster with a React foundation that can extend later.

  • Launch on more platforms.

    Bring the product to mobile, web, desktop, TV, or AI-native experiences through one codebase strategy.

  • Work with one senior team.

    Architecture, development, QA, CI/CD, and release stay under one roof from start to finish.

  • Reach market faster.

    Small senior teams using AI-native workflows shorten the path from scope to release.

  • Extend the product later.

    A modular React foundation makes it easier to add platforms, features, and new product lines without a rewrite.

Services

Ship the product across every platform.

  • App Development

  • Super App Development

    One app that bundles multiple products and services behind a single shell, often with mini-apps inside.

  • Mobile App Development

    Native iOS and Android apps built from a single React Native codebase, shipped to both stores with native performance and the platform feel users expect.

  • Web App Development

    React and Next.js applications for the browser, from marketing sites to the full product, sharing components and logic with the mobile app when built alongside it.

  • Streaming App Development

    Video and media apps for tvOS, Android TV, and web, with playback, navigation, and discovery tuned for remote-control UX and large-screen layouts.

  • VR App Development

    Immersive 3D applications for headsets like Vision Pro, Quest, and WebXR, built with React frameworks that extend into spatial computing environments.

  • Desktop App Development

    Native macOS, Windows, and Linux apps from the same React Native codebase, so one team ships the product across mobile and desktop without separate stack.

  • Generative AI Development

    Apps where LLMs are part of the core experience: chat, agents, drafting, and reasoning built across mobile and web with streaming, tool use, and memory.

  • Product Design

  • Cross-Platform Product Design

    Design production-ready product experiences across mobile, web, desktop, and TV, with platform constraints considered from the start.

  • TV Product Design and 10-Foot UX

    Design remote-first TV interfaces with focus management, content discovery, and performance constraints built in.

  • Rapid Prototyping for Real Devices

    Build device-grade prototypes with real navigation, gestures, and motion to validate complex flows before full implementation.

  • AI Product UX

    Design interfaces for chat, agents, generative UI, human-in-the-loop flows, trust, control, and review.

End-to-End Product Development

Start with a product scoping call.

Tell us what you're building and who it's for, and we'll come back with a platform plan, team shape, and a realistic timeline to first release.

Book a scoping call

How we work together

Take one product from scope to scale.

  • Extend your team

    Our senior engineers join your team to ship features, guide technical decisions, and strengthen delivery.

    • Your roadmap and workflow
    • Expertise shared as we work
    • Flexible timezone coverage

  • Deliver a project

    We take agreed work from technical planning to release, with clear responsibilities and progress you can see.

    • 3 Callstack engineers ship like 6
    • Impact visible before sprint two
    • End-to-end delivery

  • Solve specific challenge

    We address a performance, migration, or infrastructure challenge, or run training around your team’s needs.

    • Focused reviews or implementation
    • Knowledge your team keeps
    • Outcomes guaranteed with contract
100+
Enterprise projects delivered
React Foundation Founding Member
300+ commits to React Native
3x
Delivery acceleration
80%
Effort executed by agents
Industry runs on our tooling
50M+
OSS downloads / month
5
Platforms under one React Native codebase

Expensify uses agent-device. Mobile bug evidence and profiling are part of its documented usage story.

10 years of React Native → Now in your AI stack

Start with a product scoping call.

Tell us what you're building and who it's for, and we'll come back with a platform plan, team shape, and a realistic timeline to first release.

Book a scoping call

Open Source

Build with our open-source tools.

We open-source the tools behind our delivery model.
Use them, fork them, or let us run them for you.

Check All ToolsExplore AI Infrastructure

React Native Paper

Material Design for React Native (Android & iOS)

2M downloads/mo

React Navigation

Routing and navigation for your React Native apps

218.4K downloads/mo

React Native Pager View

React Native wrapper for the Android ViewPager and iOS UIPageViewController

5.5M downloads/mo

React Native Slider

React Native component exposing Slider from iOS and SeekBar from Android

6M downloads/mo

React Native Bottom Tabs

Native Bottom Tabs for React Native

408.8K downloads/mo

Liquid Glass

iOS Liquid Glass in React Native

539.2K downloads/mo

Voltra

Voltra lets React Native developers build native iOS Live Activities, Dynamic Island layouts, and widgets as React components without writing Swift.

88.1K downloads/mo

React Native Vision OS

A framework for building native visionOS applications using React Native

1.1K stars

React Native AI

On-device LLM execution in React Native with Vercel AI SDK compatibility

227.7K downloads/mo

Insights

Worth your time, by engineers.

Explore Insights
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Aug 31Article

Working With the React Native Super App Showcase Repository

This article explains how the Super App Showcase structures a React Native super app around a Host Shell, federated mini apps, and a Shared SDK. It covers how Re.Pack and Module Federation load feature bundles at runtime while the host keeps native code and shared singletons consistent. The cold-start sequence shows how these parts work together, while the sections that follow cover module setup, shared state, real-time data, and UI performance. The final section focuses on production requirements for remote bundle discovery and version compatibility.

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Jul 21Article

A Step-By-Step Guide to Super App Development With Re.Pack 5

This hands-on guide shows how to turn two React Native applications into a minimal super app. Configure Re.Pack 5 and Module Federation, expose a mini app, register it in a host, and load it with React.lazy while handling loading and error states.

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Jul 7Podcast

What AI Changes for Paywalls and Monetization

Perttu Lähteenlahti (RevenueCat) talks about AI-generated paywalls, MCP tooling, monetization experiments, and what RevenueCat is building next across mobile and web.

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Jun 29Podcast

How Voice Agents Handle Latency, Turn-Taking, and Safety

Kræn Hansen (ElevenLabs) talks voice-agent UX, from turn-taking and safety to layered SDK design for React and React Native.

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Jun 17Article

Why Banking App Modernization Stalls Before It Ships

This article looks at why banking app modernization often slows down after the strategy is set. We cover the delivery problems that show up as apps grow, from release coordination and testing to observability and cross-team ownership. We also explain why architecture alone does not solve them and what a shared platform function can do to help banks ship faster without losing control.

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Jan 12Podcast

Building v0 iOS and Fixing React Native Along the Way

A technical look at building v0 mobile with React Native and Expo, covering iOS-first decisions, native modules, and fixes pushed to React Native core. Featuring Fernando Rojo, Szymon Rybczak, and Oskar Kwaśniewski.

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Dec 8Article

Mobile vs. VR: Key Differences in Features, UI, and UX

This article highlights the core shifts developers face when moving from mobile screens to VR windows. It explains how windowing, typography, spacing, accessibility, and interaction patterns behave differently in a headset, and shows how to apply those changes in React Native. By understanding these differences, you can design 2D UIs that feel natural, readable, and comfortable on Meta Quest.

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Dec 4Live Stream

React Native on Meta Quest: What We Learned About Building for VR

See Meta Quest used as a practical dev setup and watch the team build and test React Native features directly inside a VR workspace.