Experience

Built a Node.js migration pipeline between MongoDB and OracleDB, processing 200K+ records daily in production.

Designed and shipped the Chatbot KPI backend in Node.js from scratch, reducing production bugs by 40%.

Contributed to chatbot system design with LLM integrations to improve response quality and orchestration flow.

Developed a Spring Boot microservice for chatbot node management with PostgreSQL, Redis caching, and MinIO asset integration.

Implemented and refactored core chatbot backend modules including API security, conversation sessions, and back-stack navigation.

Built a background analytics service in Spring Boot using Redis Streams producers, consumers, and consumer groups for async analysis.

Delivered analytics backend on Spring Boot + OpenSearch with Docker sync jobs between MongoDB and OpenSearch.

Created front-end utility modules with the Qt framework to streamline repeated UI workflows.

Refactored existing modules to improve maintainability, readability, and execution efficiency.

Enhanced system functionality and runtime performance through targeted algorithm improvements.

Developed interfaces that improved integration consistency between front-end and back-end systems.