Mid-Level (3–6 years) · Module B
Migrating a Customer Off a Legacy Integration Safely
Why 'cut over and hope' fails, and what to run in parallel instead.
What this session covers
- Run old and new in parallel before cutting over — comparing outputs side by side catches discrepancies while the safety net still exists.
3 more key points, the audio walkthrough and the diagram are in the full session, which unlocks with any paid plan.
What mid-level FDE interviews look for
Mid-level candidates are expected to own integrations end to end: estimate timelines they can hit, make build-vs-configure calls, run postmortems, negotiate scope and lead a customer engagement without formal authority.