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Set up Sentry for error tracking with source map upload, release tracking, performance monitoring, and alert routing that won't create alert fatigue.
Navigate ESM and CommonJS in Node.js 22. Master require(esm), package.json exports, moduleResolution bundler, and learn when to go full ESM.
Decouple services and handle long-running operations with event-driven architecture, using CloudEvents and Kafka for reliable, observable event flows.
Order created at 10:00. Order cancelled at 10:01. Your consumer processes them in reverse — cancellation arrives first, then creation "succeeds." The order is now in an invalid state. Event ordering bugs are subtle, expensive, and entirely avoidable.
Event sourcing for AI compliance: immutable audit trails, GDPR Article 22 compliance, replaying AI decisions, PII masking, and temporal queries for regulated industries.