Self-Service Database Mobility: How We Built Trendyol’s Internal PostgreSQL Migration Platform The Hidden Cost of “Simple” Solutions Your first instinct might be: “We’ll just dump and …

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Trendyol's Database Platform team built a self-service PostgreSQL migration platform using Temporal.io to replace manual, DBA-intensive migration scripts. The platform addresses key challenges including WAL bloat, sequence synchronization, replication slot continuity, and safe cutover mechanics. It uses a hybrid pg_dump + logical replication approach with parallel restore, DDL safeguards via event triggers, and intentional human approval gates at critical decision points. The result is a system where teams can trigger migrations autonomously while DBAs retain strategic oversight, reducing migration time from days or weeks of constant attention to a largely automated process.

Self-Service Database Mobility: How We Built Trendyol’s Internal PostgreSQL Migration Platform

The Hidden Cost of “Simple” Solutions