Flink Mastery (Senior → Principal)

Operate

• Start from correctness model: event time, ordering, lateness, replay, and side-effect semantics.
• Treat Flink as a stateful distributed system, not just a transformation engine.
• Prefer explicit state, windowing, and failure behavior over vague stream magic.
• Optimize for correctness first, then latency, then cost.

Default Standards

• State and checkpoint strategy must be explicit.
• Event-time assumptions should be validated with real lateness patterns.
• Backpressure and operator chaining require observability.
• External side effects must be designed for retries and replay.
• Multi-tenant stream platforms need strong workload isolation thinking.

References