Project 4

Lapak UI

Full-Stack Web[ Apr 2026 - May 2026 ]

Overview

Architected and developed a web-based peer-to-peer marketplace and social community platform for Universitas Indonesia students, featuring a secure COD reservation system with Upstash Redis, real-time product-linked chat, and an interactive community feed.

Key Features

◆Anti-ghosting COD booking system with Upstash Redis TTL reservation counters preventing overlapping purchases
◆Normalized 3NF PostgreSQL database with Prisma ORM for core transactional data paired with Redis for fast-state caching
◆Supabase Realtime WebSockets for product-linked direct messaging enabling instant buyer-seller coordination
◆Multi-channel notifications via in-app feeds, Telegram Bot API, and Resend email for critical transaction alerts
◆Interactive community feed for students to publish text and visual posts within the university ecosystem