RailRadar is a real-time train detection and arrival prediction system built for communities impa...RailRadar is a real-time train detection and arrival prediction system built for communities impa...
The network for creativity
Join 1.25M professional creatives like you
Connect with clients, get discovered, and run your business 100% commission-free
Creatives on Contra have earned over $150M and we are just getting started
RailRadar is a real-time train detection and arrival prediction system built for communities impacted by rail crossings.
Using a distributed network of camera-based tripwire sensors, RailRadar detects train movements at the edge and generates bias-corrected ETAs that adapt to real-world conditions. The system delivers timely, reliable alerts without relying on railroad-provided data or centralized tracking feeds.
RailRadar is designed for resilience and accuracy in the field. The platform supports community alerts, operational monitoring, and future integrations with municipal and transportation systems.
This project includes full-stack system design, edge sensing logic, backend services, alerting infrastructure, and deployment workflows focused on real-world reliability, not demos.
IQrate — Flutter Fintech App for iOS & Android
IQrate is a fintech mobile app that helps home buyers in Singapore
compare home loan packages and interest rates from multiple banks,
then apply directly with the bank of their choice.
I worked on this project as a Flutter developer, building a single
cross-platform codebase that ships to both iOS and Android.
What I delivered:
Cross-platform Flutter app for iOS and Android
Bank rate comparison and loan filtering by budget and tenure
REST API integration with the backend loan engine
Secure authentication and encrypted data handling
Push notification setup
App Store and Google Play submission, including Data Safety compliance and content rating
The app is live on both stores and rated 5.0 on Google Play.
With budget and tenure both changing the results, how did you handle overlapping API requests so a slower response could not replace the latest comparison?
Architected and deployed a full production B2B SaaS platform for restaurants, bars, and hospitality businesses with active daily operations and paying subscribers.
Key Engineering & Product Highlights:
• Integrated AI Operations Assistant: In-app conversational assistant powered by Google Gemini API, allowing restaurant managers to query sales velocity, stock anomalies, and daily operational metrics in real-time.
• Granular Inventory Engine: Real-time ingredient tracking down to the gram/milliliter linked directly to recipe consumption upon checkout.
• Real-Time Kitchen Sync: Bi-directional WebSocket events keeping order queues synchronized across multiple kitchen stations with zero page reloads.
• Multi-Branch & Multi-Tenant: Robust tenant data isolation, custom role-based permissions (Cashier, Waiter, Kitchen, Admin), and multi-location management.