AI Interview Prep
Score your resume, read AI Insights, then follow a day-by-day prep plan for the role you want.
The product
Paste the JD and resume — each day opens notes, tasks, and quizzes tied to your gaps and target role.
Your payments bullet invites questions on idempotency, duplicate charges, and rollback paths.
Draw the request flow: client → API → processor → webhook
Explain how you guarantee at-most-once settlement
Name one production bug you fixed and the metric it moved
Resume-specific notes
Every note starts with a line from your resume and your JD—talking points, rewrites, and interview traps for that story, not generic prep.
Built payment processing service handling $2M monthly volume with Stripe webhooks
Your bullet names Stripe and volume but not idempotency, duplicate charges, or rollback paths. Expect follow-ups on webhook retries and reconciliation.
Idempotency key strategy on POST /charges and webhook dedupe table
One incident: duplicate charge race — how you detected it and the error-rate delta after the fix
Settlement flow: client → API → processor → webhook → ledger update
Shipped idempotent payment ingestion for $2M/mo volume; cut duplicate-charge incidents 40% via webhook dedupe and reconciliation jobs
Process