- Engineered reliable event processing with retry mechanisms, exponential backoff with jitter, circuit breaker, idempotency checks, and DLQ handling, validated through k6 load testing.
- Optimized API key authentication with an in-memory LRU cache and 10-minute TTL, eliminating redundant MongoDB reads and boosting throughput by 2.5× from 310 to 780 RPS.
Node.jsExpress.jsRabbitMQMongoDBPostgreSQLDockerLRU Cachek6