Essential
* 5+ years of professional backend development experience
* Strong Node.js + TypeScript skills — this is your primary tool
* Solid experience with WebSockets / socket.io
* Good grasp of REST API design: auth, error handling, versioning
* Comfortable with Redis (pub/sub, caching, queues)
* SQL and relational database experience — AWS RDS / MySQL preferred
* Experience with message/job queues (Bee Queue, SQS, or similar)
* Solid logging and observability practice (structured logs, metrics, alerting)
* Proven experience with AWS services and a real understanding of AWS networking
* Comfortable working at pace in a small, high-trust team
Nice to Have
* Exposure to IoT systems — firmware interaction, physical device constraints, debugging connectivity
* Experience with real-time mobile app communications
* API versioning and backward compatibility experience
* Monitoring and alerting setup experience
* A track record of scaling systems through periods of significant growth
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