War Story: Ditching MongoDB 6 for PostgreSQL 17 Saved Our 50M User App from Data Inconsistencies

War Story: Ditching MongoDB 6 for PostgreSQL 17 Saved Our 50M User App from Data Inconsistencies Our social commerce platform hit 50 million monthly active users in Q3 2024, powering 1.2 million daily transactions across 30 countries. For three years, we’d run on MongoDB 6, lured by its flexible document model and horizontal scaling. But by mid-2024, data inconsistencies were threatening our core business: duplicate orders, missing user preferences, mismatched inventory counts, and support ticke