From Celery/Redis to Temporal: A Journey Toward Idempotency and Reliable Workflows

The author shares their migration journey from Celery/Redis to Temporal for a KYC orchestrator, driven by challenges in guaranteeing idempotency and managing complex stateful workflows. Celery's fire-and-forget model caused duplicate GPU-intensive face recognition tasks and scattered state management logic. Temporal's stateful workflow engine solved these issues by providing deterministic replay-based orchestration, built-in wait conditions, and structured retry policies.