--- title: "C++ Development" description: "Design and build C++ for graphics, media, and real-time processing that powers demanding apps across iOS, Android, and beyond." url: https://www.callstack.com/services/c-development updated: 2026-11-09T15:59:36.442Z --- # C++ Development Design and build C++ for graphics, media, and real-time processing that powers demanding apps across iOS, Android, and beyond. _[Expert Engineering](/ai-native-engineering) › [Feature Development](/capabilities/feature-development)_ **C++ where performance is non-negotiable** Some work cannot ship in JavaScript. We design and build the C++ under demanding apps - graphics, media, real-time processing - integrated cleanly with React Native through JSI. ## Feature Development - React Foundation Founding Member · 300+ commits to React Native · Contributing since 2016 - 100+ Enterprise projects delivered - Industry runs on our tooling · 50M+ OSS downloads / month - 3.7× Lower task cost vs Opus 5.5 - “With the release of Re.Pack 5 we now have an easy way to create the MiniApps and federated mobile apps that our users have been asking for.” — Zackary Chapple, CEO / Zephyr Cloud - ~6x Faster prototyping · 60+ Components mapped with full coverage · Figma · Claude · Server · Tailwind · Tokens · React · Cursor · ESLint - React Native Paper · A component library in our open-source toolkit for building React Native interfaces. ## What you get: Native performance, engineered deliberately. - **Performance-critical modules** Audio, video, image processing, and heavy compute in modern C++, profiled on real devices. - **One core, every platform** Shared C++ logic compiled for iOS, Android, desktop, and embedded, so behavior stays identical. - **Clean JSI integration** Type-safe bindings that expose native capability to React Native without bridge overhead. - **Memory and thread safety** Sanitizers, static analysis, and disciplined ownership models applied throughout. - **Benchmarks, not guesses** Latency, memory, and battery measured per device tier, before and after optimization. - **Maintainable handover** Documented architecture and build tooling, so the core never becomes a black box. ## How we work together: Turn roadmap scope into shipped features. ### Extend your team (1 week) 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 (1-12 months) 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 (as needed) 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 ## What shipping at AI speed looks like. - [React Universe App: Networking Evolved With Liquid Glass](/case-studies/react-universe-app-networking-evolved-with-liquid-glass): 63% adoption rate; majority of attendees registered in the app - [Building a browser-based React Native playground for Expo](/case-studies/building-a-browser-based-react-native-playground-for-expo) - [Migrating AutoZone’s Storefront to Next.js for Better Performance and SEO](/case-studies/migration-to-nextjs-for-autozone): #1 SEO rank, recovering from 3-9 - [Creating React Native SDK Wrapper for Rive](/case-studies/creating-react-native-sdk-wrapper-for-rive): 100k weekly downloads on npm **Native speed, one codebase.** A C++ core under your cross-platform app: faster, smaller, identical everywhere. [Book a call](/contact) > We had been struggling with React Native application performance until we met Callstack. > > — Huỳnh Chí Hùng, Associate Director, MOMO We’ll connect you with the right expert within 24 hours. ## Let’s find the right path for your product. **When does C++ beat Swift or Kotlin modules?** When the same logic must run on multiple platforms, or when you need SIMD, custom allocation, or tight loops. For single-platform API access, a Swift or Kotlin module is usually the simpler answer. **Can you integrate a C++ library we already have?** Yes. That is a dedicated offering - C++ Library Integration for React Native - and we scope the work accordingly. **How do you manage build complexity?** We own the CMake setup, toolchains, and CI integration, and keep native builds cached so iteration stays fast. **Does this work with the New Architecture?** Yes. JSI is the foundation of the New Architecture, and we build against it directly. **How do you keep C++ debuggable for a JavaScript team?** Clear module boundaries, structured logging across the JSI boundary, and crash reporting with symbolication set up from the start. **Who maintains the core afterwards?** Your team, with our documentation and optional support. We hand over architecture docs, tests, and build runbooks as part of delivery. ## Open source - [React Native Paper](https://github.com/callstack/react-native-paper): Material Design for React Native (Android & iOS) - [React Native Bottom Tabs](https://github.com/callstackincubator/react-native-bottom-tabs): Native Bottom Tabs for React Native - [React Navigation](https://github.com/react-navigation/react-navigation): Routing and navigation for your React Native apps - [Liquid Glass](https://github.com/callstack/liquid-glass): iOS Liquid Glass in React Native - [Voltra](https://github.com/callstackincubator/voltra): Voltra lets React Native developers build native iOS Live Activities, Dynamic Island layouts, and widgets as React components without writing Swift.