Practice from evidence
Defend a real change. Explain what you mastered.
A grounded room is seeded by another product: OpenThunder tells you the change and its risks; Repo Mastery tells you what you know and where you are weak. The counterpart presses on those exact points. Sources below are illustrative.
OpenThunderpayments-service
Change Defense: payments dedupe key
OpenThunder flagged a high-risk deploy window and an untested rollback. Defend the change.
You will be pressed on 3 points.
OpenThunderauth-gateway
Change Defense: session token rotation
Session invalidation is unenforced and two paths are unverified. Defend it to a skeptic.
You will be pressed on 3 points.
Repo Masterypayments-service
Design Review: settlement architecture
You mastered settlement + ledger. Explain them; expect pressure on idempotency and a stale area.
You will be pressed on 3 points.
Repo Masteryplatform-core
Design Review: platform core
Strong on the scheduler, weaker on cache invalidation. Explain the design under questioning.
You will be pressed on 3 points.