Good understanding of API design, request/response lifecycles, and common integration patterns. * TypeScript backend development experience using Node.js/TypeScript for API or service layer development, understanding runtime considerations, type driven development, dependency injection, and module architecture. * Microservice architecture familiarity with distributed system concepts such as service boundaries, interservice communication, API gateways, observability, logging/metrics, configuration management, and handling failure modes gracefully (timeouts, retries, backoff, circuit breakers).
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