NetflixSystem Design·60 minMembers
Subscription Billing System (300M Subscribers)
Members only
Design monthly subscription billing for 300M users: charge on the right date, never double-charge (idempotency at Redis + DB + gateway), retry failed payments with a dunning schedule, and survive sche...
SWE
Infra Eng
payment
idempotency
scheduling
scaling
transactions
hard
Frequency
Single report
Last asked
2026-01-19
Stage
onsite-system-design
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