Projects / E-Commerce Platform Migration
E-Commerce Platform Migration
Backend Developer // Apr 2021 - Jun 2021
Highlights
- Migrated 8,000+ products, 15,000+ orders, and 5,000+ customer records
- Phase-based migration with independent rollback per phase
- Validation checkpoints comparing record counts and financial totals
- Deduplication logic resolved hundreds of duplicate customer accounts
- Zero data loss during final weekend cutover
- Legacy schema normalization across 8 years of inconsistent data
About This Project
A data migration service built for an e-commerce retailer transitioning from a legacy custom PHP monolith to a modern headless commerce architecture. The project involved extracting, transforming, and loading product catalogs, customer accounts, order history, and inventory data while the business continued operating.
The Python pipeline extracted data from the legacy MySQL database, normalized inconsistent schemas accumulated over 5 years of organic growth, and loaded clean records into the new PostgreSQL database. Custom transformation scripts handled edge cases including duplicate customer records, orphaned orders, and malformed product variants.
The migration ran in phases with validation checkpoints comparing record counts, financial totals, and referential integrity between source and target. A rollback mechanism preserved the ability to revert each phase independently. The final cutover completed over a weekend with zero data loss and minimal downtime.