Projects are things I built, shipped, or have run for real users. Coursework projects are Singapore Management University and Singapore Polytechnic related.
Azure-hosted pipeline for NEA COVID-19 wastewater surveillance. 100+ Tastek industrial RTUs with SIM card slots, streaming directly over cellular to a single Azure VM running Mosquitto, the database, and the dashboard. Twilio WhatsApp alerts to the on-call engineers. Contributed to the Lee Hsien Loong IDM Smart Nation Award 2022. Straits Times feature.
ESP32-driven irrigation and lighting automation for vertical farms and grow setups. Device-agnostic relay control over standard socket panels, MQTT through HiveMQ Cloud, telemetry landed in S3. SMU BIG grant funded. Showcased to Ministers Indranee Rajah and Desmond Lee at World Cities Summit 2024.
Raspberry Pi rig with DHT22 humidity, a CO2 sensor, and relay-driven control of the grow lights and water pump. One demo rack deployed at their facility on the west coast. Featured on Channel News Asia in May 2022.
Final Year Project at Singapore Polytechnic. IoT subsystem for SP's first SAE Level 3 autonomous 5G vehicle. Featured at SP Engineering Show 2021.
Bootstrapped plant e-commerce. Live at nepseeds.com since July 2021.
Multi-region AWS (Singapore, Tokyo, Sydney) + Azure DR (Hong Kong) + Cloudflare edge with GCP secondary NS. Architecture diagram embedded inline on the case study page.
Two-surface product for a dental clinic chain: patient mobile app (appointments, recall reminders) and operations dashboard (retention by outlet, no-show analytics).
SMU-X project for Signpost Collective. Built a reference internal operations dashboard and shared the codebase openly with their team.
Ride-hailing aggregator concept: one screen to compare prices and wait times across Grab, Tada, and the other apps before booking. Won 1st place at the SMU PMx Internal Product Challenge.
Blue-team hardening lab on a deliberately vulnerable Windows Server 2000 box.
Three-branch hub-and-spoke WAN, built fully virtual in Cisco Packet Tracer Multi-User Mode.
Self-hosted four-VM Windows Server 2012 R2 datacenter on VMware Workstation, glued together with Active Directory.
Multi-site enterprise LAN with OSPF. Designed in Cisco Packet Tracer, then replicated on SP's physical Cisco rack.