Callstack Engineers Courses

Mission Unistyles - The Hunt for Zero-Cost Runtime Styling

Explore React Native's styling pipeline internals and discover how Unistyles achieves near-zero-cost runtime styling through C++ optimization and native recomputation.

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

Legend List - Optimizing for Mobile and Web

Discover how to build the fastest React list implementation with Legend List v2's core optimizations for mobile and web performance.

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

Bridging the Platform UI Gap with GenAI

Discover how GenAI coding agents can automate React Native migration, converting 10,000+ web components to mobile UI while reducing weeks of manual work to hours.

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

React Native Releases in 2025 - Towards a Stable Future

Discover React Native's strategic release overhaul with 6 predictable yearly releases, automated testing, and simplified upgrades for a stable development future.

• YouTube
• 18 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

AI for the Other Parts of Your Technical Job - Building Custom Developer Tools with AI

Discover how to build custom AI-powered tools for developers, including presentation engines and collaborative notebooks, to replace generic workflows with personalized solutions.

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

React Native AI - Bringing On-Device LLMs With AI SDK

Discover how to build custom AI SDK providers for on-device LLMs in React Native apps, integrating MLC LLM Engine and Apple's foundation models for offline AI functionality.

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

AI SDK 5 - What's New and What's Next

Explore AI SDK 5's major rewrite featuring multimodal support, type-safe UI layers, and advanced agentic tool-calling loops for modern AI application development.

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

Spec-Driven Development With Kiro.dev - AI Assistant for React TV App Adaptation

Discover how Kiro.dev transforms AI coding from unpredictable to structured, adapting React apps for TV with spec-driven development and focus management techniques.

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

Module Federation vs. Centralized Updates - OTA Deployment Strategies and Trade-offs

Explore the debate between OTA as emergency hotfixes versus Module Federation for decentralized deployment across web, BFF, and native stacks with industry experts.

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

The OTA Illusion - What No One Tells You About Instant Updates At Scale

Uncover the reality of implementing OTA updates at scale, from Klarna's custom architecture serving 100M+ users to diff-based payloads, reliability techniques, and real-world pitfalls.

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

The Past, Present and Future of Nitro - React Native Library Development

Explore Nitro's evolution from JSI experiments to powering high-performance React Native libraries, covering threading, type safety, and cross-platform C++/Swift/Kotlin bridging.

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

Adopting Cross-Platform React Native at Scale - Zalando's Learnings

Discover Zalando's enterprise-scale React Native adoption strategy, covering brownfield integration, framework architecture, and cross-platform development lessons.

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

Exploring Lynx JS - From Quick Start to CLI Workflow

Dive into Lynx JS developer experience, comparing official docs setup with community CLI workflow through hands-on "Hello World" app building and best practices.

• YouTube
• 2 hours 1 minute
• Self-Paced
• Free Video