The original title is "How We Split a Legacy Monolith Into Microservices Without a Single Outage"

Short summary

A telecom platform serving 30M+ subscribers was migrated from a legacy monolith to microservices using the Strangler Fig pattern with zero outages. The approach routes traffic through a facade, migrates one capability at a time, uses anti-corruption layers to avoid database coupling, and validates new services via shadow traffic before cutover. Each slice is kept small enough to be boring, and the business never stops shipping features.

• •Strangler Fig pattern enables incremental monolith-to-microservices migration without feature freezes
• •Start with high-value, low-risk slices; use anti-corruption layers to prevent database coupling
• •Shadow traffic validates new services against real production traffic with zero customer impact

Generated with AI, which can make mistakes.