How to Migrate a Legacy System Without Breaking Production

This is a submission for the Google Cloud NEXT Writing Challenge How do you change an entire production system… without a single minute of downtime? 🤔 There’s a common mistake many teams fall into: “Let’s throw away the old system and rewrite everything from scratch.” That’s the classic Big Bang Rewrite. And the usual result? 🔥 Delays 🔥 Bugs 🔥 Production issues 🔥 And in the end… crawling back to the old system 😅 💡 The smarter approach: Strangler Fig Pattern The idea is simple: Instead of