- Refactored React class components into functional components.- Redesigned the scheduling page to enhance clashing schedule visibility and user experience.- Developed new features in collaboration with other engineers, ensuring seamless cross-team integration.- Improved the task runner by breaking large tasks into smaller ones, enabling cancellation of running tasks, and scheduling retries to reduce downtime while waiting for expanding server capacity.- Managed library upgrades, including React Native version upgrades.- Identified and resolved technical debt bugs to enhance system stability.- Built and maintained the ERP system using Stripe, HubSpot, and Zapier to automate the billing process.- Migrated from Firebase Realtime Database to PostgreSQL to reduce costs.- Collaborated with data analysts to capture performance metrics for web and mobile apps,improving tracking capabilities and visibility into key issues.- Researched and analyzed Segment's billing structure,proposing optimizations to reduce costs.

- Developed the admin panel for a mobile sports field booking app (WePlay, no longer available on the Play Store).- Maintained APIs to ensure seamless app functionality and backend communication.

- Developed multiple CMS-based websites for small shops and their landing pages.- Built an internal chat tool using WebSocket, supporting image uploads with progress indicators.- Created a basic booking system for children’s crafting courses, streamlining the registration process and enhancing customer experience.

- Developed and deployed websites for various clients, ensuring functionality and user satisfaction.- Assisted with production deployments in collaboration with the DevOps Engineer, taking responsibility when the part-time DevOps Engineer was unavailable, as we managed our self-hosted server.- Collaborated with frontend developer to integrate backend into user interfaces.

I attended a bootcamp at Refactory for mobile programming (Android), where I learned to develop mobile applications using React Native, Firebase, and Laravel (API).

I taught basic robotics to young learners, including kindergarten and elementary school students, using various robotic kits such as Roborobo, VEX IQ, and VEX EDR.

I worked part-time as a private mathematics tutor for elementary and junior high school students.