System Development

• Contributed to development of an all-in-one POS system, consolidating diverse functionalities into a unified platform

• Designed and engineered APIs for in-house tools to streamline order processing, employee management, and daily operations

• Redeveloped the front-end UI for reservation systems using modern frameworks, ensuring a seamless user booking experience

• Built a real-time calendar-based scheduling system with WebSocket, enabling efficient order management and team collaboration

• Implemented a rule engine–based campaign and coupon system to support configurable and scalable promotional workflows

Performance Optimization

• Improved high-demand endpoint response times by over 60% through code refactoring and database query optimization

• Resolved concurrency issues in the queue system, ensuring reliable, scalable operation under heavy traffic loads

• Optimized backend processes for reservation systems, reducing CPU usage on Azure-hosted MySQL

• Migrated critical workflows to efficient libraries, achieving faster and more reliable performance

Automation & Scalability

• Developed and automated key operational processes, including scheduled batching, customer notifications, and dynamic schedule generation, utilizing cron services and Azure Logic Apps

Payment Integration & Optimization

• Maintained and optimized integrations with third-party payment gateways, ensuring secure and seamless transaction processing

Deployment & Monitoring

• Managed CI/CD pipelines with GitHub Actions for deployment across local, staging, and production environments, ensuring consistent software delivery

• Monitored system performance using SEQ, proactively addressing potential issues to maintain system stability

System Support & Collaboration

• Conducted bug fixes across backend and frontend systems, ensuring efficient resolution of system issues

• Collaborated within cross-functional Agile teams to design and implement solutions aligned with evolving business needs