Offer workflow: state, idempotency, outbox

Design the service that creates an offer, accepts/cancels it, records every transition, and safely notifies downstream systems.

Explain the architecture from API to DB to async workers, then survive failure-mode probes.

No term dump. Explain what happens, why, what breaks, and how you prove it.

Concept rescue

막히면 여기서 바로 본다

지금 말하다가 막히는 단어를 검색해라. 이 패널은 스파링을 떠나지 않고 개념을 다시 잡는 용도다.

Selected target

Explain why status changes should use a transition endpoint, not a field update.

voice

Make me explain

Mechanism starters

Start in your own words: I would make the database the source of truth.

네 말로 설명하면 여기에 transcript, 기술 피드백, 영어 교정, 다시 말할 senior answer가 뜹니다.