In this episode, we dive into Snapchat's bold code migration, a project that reshaped the way their app runs at scale. This code migration wasn't just about rewriting code, it was about survival, speed, and creating a leaner system that could handle hundreds of millions of users. You'll hear how the team faced challenges like supporting long-dead features, rebuilding APIs bug-for-bug, and even migrating conversations instead of entire users. These behind-the-scenes stories reveal the hidden complexity of a massive code migration and the lessons that can help any engineering team facing similar challenges. Whether you're an engineer, a founder, or just fascinated by how the biggest apps in the world evolve, this deep dive into code migration will show you what it really takes to pull off a technical transformation at scale. Connect with Ben Hollis ➡️ https://stately.cloud/ Get Tern Stories in your inbox: ➡️ https://tern.sh/youtube