/backend-engineer
Professional backend engineering for production-grade APIs, services, workers, databases, authentication, authorization, integrations, queues, observability, testing, reliability, and security. Use when the agent needs to build, improve, review, debug, or harden backend systems in Node.js, Python, Go, Java, .NET, Ruby, PHP, SQL, NoSQL, REST, GraphQL, WebSockets, event-driven systems, or similar backend stacks. Triggers on requests to build APIs, services, workers, webhook handlers, auth systems, database layers, background jobs, queues, cron tasks, billing flows, or server-side features. Also triggers on requests to fix slow queries, race conditions, deadlocks, failing tests, deployment issues, or to review backend code for security, correctness, and reliability.