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Functional Core, Imperative Shell – Using Structured Concurrency to Write Maintainable gRPC Endpoints in Kotlin

In the process of migrating from a python monolith to a service-oriented architecture using gRPC microservices in Kotlin, DoorDash Engineering had the opportunity to better define patterns for how we implement gRPC endpoints.

How to leverage functional programming in Kotlin to write better, cleaner code

As DoorDash transitioned from Python monolith to Kotlin microservices, our engineering team was presented with a lot of opportunities to improve operational excellence and continue our obsession with reliability.