Full Stack Engineer interview practice

End-to-end ownership: API contracts, schema migrations, auth pipelines, and realtime features — evaluated across the whole stack in one sitting.

Topics this interview probes

API design & versioning Schema migrations Auth & sessions Realtime (WebSockets, SSE) Edge caching Observability

How would you design a zero-downtime database migration for a table with 50 million rows?
Compare session-based and token-based auth for a multi-tenant SaaS — what would you choose and why?
A customer wants live dashboards. Walk me through WebSockets versus server-sent events for their scale.

The live interviewer generates fresh, role-tailored questions — and drills down when your answers are vague.