Callstack Engineers Courses

Bring Your Favorite Language to React Native - Using WebAssembly to Integrate Multiple Languages

Discover how to integrate native libraries in React Native using PolyGen, a toolkit that leverages WebAssembly to embed code from languages like Rust, Go, and COBOL without writing TurboModules.

• YouTube
• 24 minutes
• Self-Paced
• Free Video

Master JavaScript Performance in React Native - Part 2

Dive into advanced JavaScript performance optimization for React Native with practical solutions for debouncing, Context API usage, Redux selectors, Concurrent React features, and off-thread processing using Worklets.

• YouTube
• 1 hour 11 minutes
• Self-Paced
• Free Video

The Ultimate Dev Machine Setup: Experts' Must-Haves and Community Picks

Discover how to transform a factory-reset laptop into the ultimate development environment for React, React Native, and web development with expert-recommended tools, utilities, and productivity hacks.

• YouTube
• 2 hours 23 minutes
• Self-Paced
• Free Video

Scaling React Native at Zalando - How Brownfield Migration Paid Off

Discover how Zalando successfully integrated React Native into their decade-old mobile architecture, covering migration strategies, technical challenges, and proven business value.

• YouTube
• 1 hour 16 minutes
• Self-Paced
• Free Video

Understanding Threads and Queues in Swift TurboModules

Master threading in React Native TurboModules with Swift, covering JS thread management, GCD queues, and async implementations to prevent UI freezes and optimize performance.

• YouTube
• 23 minutes
• Self-Paced
• Free Video

Two Threads of Lynx.js - Part 2

Explore Lynx.js dual-threaded architecture with practical examples, API guidance, and live coding to optimize React Native app performance and structure.

• YouTube
• 2 hours 16 minutes
• Self-Paced
• Free Video

How to Add Type-Safe Constants to Swift TurboModules

Discover how to expose native Swift constants to JavaScript with full type safety using React Native TurboModules and Codegen for robust cross-platform development.

• YouTube
• 12 minutes
• Self-Paced
• Free Video

Sparkling - A New Framework for Lynx

Explore Sparkling, TikTok's open-source cross-platform framework, and its integration with Lynx through live demos, architectural insights, and expert perspectives from the engineers behind it.

• YouTube
• 1 hour 47 minutes
• Self-Paced
• Free Video

From Teddy Bears to Voice Agents - Voice AI, Local-First and App Security

Explore local-first architecture, voice AI, and app security through real-world experiences with React Native, MongoDB, and ElevenLabs voice agents.

• YouTube
• 58 minutes
• Self-Paced
• Free Video

How to Optimize Your Health with React Native

Discover how to build a production React Native health app that transforms Heart Rate Variability data into actionable readiness scores using Apple HealthKit integration.

• YouTube
• 30 minutes
• Self-Paced
• Free Video

Building a Video Experience with React Native - Lessons from Early Adoption

Discover how to build high-performance video experiences in React Native, from custom Fabric players to reducing jank by 87% through optimization techniques and architectural decisions.

• YouTube
• 22 minutes
• Self-Paced
• Free Video

LLM Inference On-Device in React Native - The Practical Aspects

Explore practical aspects of running LLM inference directly on mobile devices using React Native, covering model constraints, acceleration tradeoffs, and optimization techniques.

• YouTube
• 31 minutes
• Self-Paced
• Free Video

Performance Comparisons in Brownfield React Native Projects

Discover how to measure performance during incremental React Native migrations without rebuilding from scratch, featuring Zalando's production-tested approach to brownfield projects.

• YouTube
• 12 minutes
• Self-Paced
• Free Video

Beyond React Native - Lynx's Native CSS and Two-Thread Model

Discover Lynx framework's native CSS support and two-thread architecture for seamless web-to-mobile migration and hybrid UI synchronization solutions.

• YouTube
• 16 minutes
• Self-Paced
• Free Video

React Native Stability, Platform Expansion, and Brownfield Adoption

Explore React Native's 10-year evolution focusing on stability, multi-platform expansion challenges, and practical brownfield adoption strategies for enterprise integration.

• YouTube
• 16 minutes
• Self-Paced
• Free Video