DatabasesBackend
Database Migration
Also written as Schema Migration
A structured, often version-controlled change to a database's schema (adding a column, changing a data type) that can be applied and rolled back safely, especially on a live production database.
Think of it like
Like renovating a building's plumbing while tenants still live there — planned, staged, and reversible, instead of just ripping out pipes and hoping for the best.
Junior or senior?
Junior sounds like
Has only written a local schema change.
Senior sounds like
Has run a risky migration on a live production database and can describe how they minimized downtime or risk.
Ask them
“Tell me about the riskiest database migration you've run on a live production system. How did you minimize the risk?”