The original title is "What I Learned After Building a Redis Queue Feature in SyncFlow"

Short summary

Building a Redis queue feature for background jobs requires thinking beyond just working code. Type checking, dependency locking, environment variable validation, health endpoint design, queue data flows, type-safe job payloads, and security controls all matter. The author learned this by building SyncFlow's inventory sync queue—and catching multiple issues in code review that would have broken production.

• •Type checking and dependency management are non-negotiable before commit
• •Every queue needs a worker and clear data flow; retry logic requires explicit handling
• •Environment variables must be validated at startup; health endpoints should be defensive and protected

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