MongoDB to PostgreSQL Migration

The platform was running on MongoDB, which was causing high operational costs and performance issues. The healthcare platform needed better query performance, more reliable data consistency, and reduced operational expenses to scale effectively. Additionally, the platform was adding new monitoring integrations which required a more robust data layer.

I was given complete end-to-end ownership to orchestrate a complete platform database migration from MongoDB to PostgreSQL, ensuring zero downtime and maintaining system reliability throughout the process.

I designed a zero-downtime migration strategy and implemented two-way real-time data synchronization between MongoDB and PostgreSQL, maintaining both systems running simultaneously during migration. I designed and implemented a new API architecture, optimized backend API responses and database queries, and optimized PostgreSQL queries with custom indexes and query analysis. I retired legacy services after successful migration.

This project taught me the importance of careful migration planning and real-time synchronization strategies. The zero-downtime approach required extensive testing and careful coordination, but was essential for a healthcare platform where availability is critical.