At Chaayos, I own Java/Spring Boot services connecting Kettle POS with four delivery aggregators across 200+ cafes. I built the Ownly integration and event-driven SQS and Redis flows with retries and reconciliation, bringing lost partner orders and status syncs to near zero.
I also work on kitchen IoT and attendance platforms, including Android device control over WebSockets and MQTT, and a multi-tenant attendance system for 2,000+ employees. I built a Python and Flask procurement agent over ClickHouse data, using governed SQL queries and SSE streaming.
