Callstack Engineers Courses

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

React Native at Scale With NFL

Discover how the NFL leverages React Native to deliver seamless experiences across mobile, web, and TV platforms at massive scale with millions of users.

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

Building iOS Live Activities with React

Discover how to build iOS Live Activities using React and JSX instead of Swift, enabling real-time experiences like order tracking and live sports through Voltra's innovative approach.

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

Writing Your First TurboModule in Swift

Master building React Native TurboModules with Swift by creating a Local Storage API, covering TypeScript specs, Codegen, and JavaScript integration in this hands-on tutorial.

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

Observability for Application Deployments

Discover how to debug application performance issues using observability techniques, from global latency to hydration delays and multi-service bottlenecks.

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

Brownfield Incremental React Native Adoption with React Native Enterprise Framework

Discover how to seamlessly integrate React Native into existing native apps using RNEF, with practical techniques for smooth migration without disrupting your current workflow.

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

Elevate React Native Observability With OpenTelemetry

Discover how OpenTelemetry transforms React Native app observability through advanced tracing, logging, and metrics to identify performance bottlenecks and enhance reliability.

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

Observability and OpenTelemetry in React Native

Discover how to implement OpenTelemetry in React Native apps to eliminate blind spots in performance monitoring, crashes, and user behavior with expert insights on mobile observability.

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

Native Apps Without a Build Step

Discover how React Native Enterprise Framework cuts CI build times by 90% using remote caching, native build fingerprinting, and reusable artifacts across environments.

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

Run LLMs Locally with React Native and MLC

Discover how to run large language models directly on mobile devices using React Native and MLC, enabling offline AI apps with real-time text generation on iOS and Android.

• YouTube
• 1 hour 26 minutes
• Self-Paced
• Free Video

User-Focused Performance Tracking for React Native

Discover user-focused performance tracking strategies for React Native, emphasizing UX metrics over technical measurements to improve app experience and ship fixes faster.

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

Tips and Tricks From the Ultimate Guide to React Native Optimization 2025

Unlock React Native performance secrets with React 19 hooks, native view optimization, Hermes configuration, and debugging tactics for faster, smoother mobile apps.

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

From Hours to Minutes: Making Your React Native CI Builds 20x Faster

Discover how to reduce React Native build times from 40 minutes to 2 minutes using Callstack's open-source Enterprise Framework, with practical demos of native build caching that works across development environments.

• YouTube
• 1 hour 5 minutes
• Self-Paced
• Free Video

Build High-Performance Modules in React Native with Node-API

Master Node-API to build stable, cross-platform native modules for React Native using C++, Rust, and Swift that work across JavaScript engines without rewriting code.

• YouTube
• 2 hours 43 minutes
• Self-Paced
• Free Video

How to Gradually Migrate From React Native Community CLI to Expo

Discover how to incrementally migrate your React Native Community CLI app to Expo without breaking functionality, featuring expert guidance on integration strategies and tooling benefits.

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