A team project. I owned the backend: real-time WebSocket notifications via Supabase Realtime, a social graph schema in PostgreSQL for bidirectional friend connections, and file uploads with access controls. The trickiest bit was the notification system. Multiple client sessions per user, each needing consistent real-time delivery without duplicates or dropped messages. WebSocket connection management with automatic reconnection handled most of it, but the edge cases around concurrent sessions took real thought.

Key Features

  • Real-time notification system using WebSockets and Supabase Realtime for instant updates
  • Custom social graph implementation with bidirectional friend connections in PostgreSQL
  • RESTful API layer with optimistic updates for responsive friend operations
  • Secure file upload system integrated with Supabase storage
  • Robust authentication flow with multiple providers
  • WebSocket connection management with automatic reconnection handling

Technical Architecture

Frontend

Integrated the backend services with the team's Next.js/React frontend. Implemented Tanstack Query for efficient state management and optimistic updates, significantly improving perceived performance. Built reusable hooks for WebSocket management and real-time data synchronization.

Backend

Architected and implemented a real-time notification system using WebSockets and Supabase Realtime, ensuring reliable message delivery across multiple client sessions. Designed an efficient social graph schema in PostgreSQL, optimizing friend relationship queries and management. Built RESTful APIs with comprehensive validation and error handling.

Infrastructure

Implemented a secure authentication flow using Supabase, supporting multiple providers and session management. Built a scalable file upload system with proper access controls and storage optimization. Set up WebSocket infrastructure with connection pooling and automatic recovery.