Kafka Streams Topology Skill

Expert knowledge of Kafka Streams library for building stream processing topologies in Java/Kotlin.

What I Know

Core Abstractions

KStream (Event Stream - Unbounded, Append-Only):

• Represents immutable event sequences
• Each record is an independent event
• Use for: Clickstreams, transactions, sensor readings

KTable (Changelog Stream - Latest State by Key):

• Represents mutable state (compacted topic)
• Updates override previous values (by key)
• Use for: User profiles, product catalog, account balances