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 360-site NEA COVID-19 wastewater surveillance. 100+ Tastek industrial RTUs (embedded SIM) 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 hydroponic SMEs. AWS S3 data pipeline. 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. Deployed as a single demo rack at an indoor farm on the west coast of Singapore. Featured on Channel News Asia in May 2022.
Final Year Project contributing to SP's first SAE Level 3 autonomous 5G vehicle. Led a 5-person IoT subteam building a cloud-based monitoring dashboard in React, Node.js, and MySQL. Node-RED firmware on Raspberry Pi captured telemetry over MQTT, with alerting on environmental hazards and battery thresholds. Featured at SP Engineering Show 2021.
Bootstrapped plant e-commerce since July 2021. End-to-end supply chain for perishable, regulated botanical inventory including NEA phytosanitary certifications and CITES compliance. 98% on-time fulfillment, grew social following 600 to 1000+ organically.
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; click to open full size and pan or zoom around the four clouds.
Two-surface product for a dental clinic chain: patient mobile app (appointments, recall reminders) and operations dashboard (retention by outlet, no-show analytics).
Internal operations dashboard for Signpost Collective. SMU-X engagement with real client use. Admin and member role-based access plus analytics views.
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.
Hardened vulnerable Windows Server 2000 against common exploitation vectors. Restricted DNS zone transfers, deployed IIS Lockdown Tool, replaced insecure remote access with CopSSH, enforced strong password policies via Group Policy. Validated through active penetration testing (nslookup zone transfers, nmap port scanning).
Architected hub-and-spoke WAN topology in Cisco Packet Tracer Multi-User mode. Connected 3 branch offices to central HQ across simulated internet backbone with hierarchical IP addressing (172.23.0.0/16), RIPv2 routing with PPP auth, DHCP, and standard/extended ACL policies.
Self-hosted virtualized datacenter on VMware Workstation. 4 Windows Server 2012 R2 instances (Domain Controller, DNS/DHCP, File Server, Web Server). Active Directory with hierarchical OUs, scripted bulk user provisioning for 50+ accounts via PowerShell, enforced Group Policies with 5GB storage quotas.
Multi-site enterprise network using 7 Cisco routers and 5 switches in a hybrid environment (Packet Tracer + SP physical server racks). Star-topology LAN supporting 12+ endpoints and 2 internal servers. VLSM IP scheme, OSPF multi-area routing with failover, ACL-based access policies.