CASE STUDY 01
Caarvn Mobility Platform
A full-stack, cloud-native carpooling platform engineered from initial product concept and UI/UX design through high-concurrency backend development and AWS production deployment.
Flutter (BLoC)
Node.js & Express
PostgreSQL & Prisma
Redis Caching
AWS (EC2, S3, Nginx, PM2)
OpenStreetMap
OTP & JWT Auth
Gov ID Verification
Concurrency Protection
Admin Dashboard
Engineering Summary
"Built from concept to active cloud deployment: Caarvn features sub-200ms REST APIs, real-time location-based ride discovery, BLoC state management, automated ride lifecycle schedulers, and zero double-booking race condition guarantees."
01 / Concept & Product Architecture
Caarvn was built to eliminate urban commuting friction by pairing drivers with extra seat capacity with passengers heading along identical travel corridors. We took full ownership of the product lifecycle—shaping user flows, defining transaction safety guarantees, designing system contracts, and delivering a battle-tested infrastructure ready for production traffic.
02 / Core Engineering Pillars
Mobile App & State Architecture
Developed with Flutter using BLoC state management to guarantee predictable state transitions across complex ride lifecycles. Features OTP phone authentication, JWT session persistence, and smooth location discovery powered by OpenStreetMap services.
Trust, Safety & Verification
Integrated secure government ID and driving license upload workflows using encrypted AWS S3 storage. Enforced multi-tier vehicle registration, passenger check-in tokens, and post-ride rating loops for platform safety.
High-Concurrency Backend
Built with Node.js, Express, and PostgreSQL using Prisma ORM. Redis caching powers high-speed session handling and rate limiting, while transactional locks prevent double-booking and race conditions during simultaneous seat reservations.
AWS Production Deployment
Architected and deployed on AWS EC2 behind an Nginx reverse proxy with HTTPS/SSL, PM2 process management, automated background ride-lifecycle schedulers, push notifications, and production error tracking.
03 / Platform Engineering Checklist
Every layer of the Caarvn platform was built with strict production requirements, security checks, and edge-case handling:
- Flutter BLoC State Architecture
- Secure OTP & JWT Authentication
- Location-Based OpenStreetMap Search
- Concurrency & Double-Booking Locks
- Govt ID & License Document Uploads
- Encrypted AWS S3 File Storage
- Redis Caching & Rate Limiting
- PostgreSQL & Prisma ORM Engine
- Auto-Ride Lifecycle Schedulers
- Push Notifications & Reminders
- Full Admin Platform & Verification Audit
- AWS Nginx, PM2 & SSL Production Hardening