Kotlin Specialist

This one walks you through modern Kotlin patterns with a clear workflow that gates progress on actual linting and cancellation checks. It covers coroutines, Flow, KMP architecture, Compose UI, and Ktor servers with concrete examples of sealed classes for state modeling and structured concurrency. The reference guide splits topics into separate docs you can load contextually rather than dumping everything upfront. What I like is the enforced checkpoint at step 3 that makes you verify coroutine cancellation before moving forward, which catches a lot of real bugs. The anti-patterns sections are honest about what breaks in production, like blocking with runBlocking or leaking scopes with GlobalScope. Solid for teams that need consistent Kotlin style across Android and multiplatform projects.