Have you done any migration projects?
💡 Model Answer
Yes, I led a migration project from an on‑premises Oracle database to Amazon RDS for PostgreSQL. The goal was to reduce maintenance overhead and enable cloud‑native analytics. I started by performing a data inventory and mapping source tables to target schemas, using AWS Schema Conversion Tool to automate much of the conversion. Next, I designed a phased migration plan: a pilot migration of a small subset of tables to validate data integrity, followed by bulk data transfer using AWS Database Migration Service (DMS). I implemented CDC (Change Data Capture) to keep the source and target in sync during the cut‑over window. Throughout the process, I coordinated with DBAs, developers, and business stakeholders to schedule downtime and communicate progress. The migration completed two days ahead of schedule, with a 99.9% data accuracy rate and a 30% reduction in query latency on the new platform. This experience taught me the importance of thorough testing, clear communication, and leveraging managed services to streamline complex migrations.
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