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4
Build a Webhook Notification System
CodingmediumCommon
webhooksreal-timeevent-driven
Reported
8 times
Last seen
2026-03-20
First seen
2025-07-22
Active in
2025, 2026
Description
Implement a system that notifies applications of account changes (new transactions, balance updates) in real-time with delivery guarantees.
Approach Tips
Cover at-least-once delivery with idempotency keys. Discuss batching notifications, retry policies, and webhook verification.
Sources
Blind·SDE-2·2026-03-20
Glassdoor·SDE-3·2025-11-15
PL
Plaid
Fintech/Infra
Typically appears in: Phone Screen
60 min — Algorithmic coding problem. Focus on clean code and problem-solving approach.