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NDC Conferences: Migrating from a monolith to a new service - Connell Sharp - NDC Copenhagen 2025

Connell Sharp takes us behind the scenes of how the Stack Overflow team sliced a small feature out of their giant monolith and turned it into a standalone microservice—complete with its own database and a fresh microfrontend UI—all rolled out with zero downtime. Along the way, he gets real about tackling eventual consistency, multi-tenancy quirks, circular references, CORS headaches and more.

You’ll hear why they picked the strategies they did, what alternatives they kicked around, and the key lessons they walked away with from this live migration experiment.

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