Thayne McCombs Interview
summary
Company moves to continuous delivery and faces test coverage, backward-compatibility and release-safety gaps while shipping more often. Relational data is being sharded by application boundary with separate databases per service, which reduces vertical scaling but adds operational complexity and coupling that causes cascading failures. All services live in a single AWS region now; plans include multi-region deployment and geographic data sharding. Backend uses many threads and adopts functional programming with immutable data pipelines to reduce data races.
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