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India scale
Tatkal bursts, UPI volumes and a billion cricket fans: the traffic shapes that teach scale.
Path
System design
Level
Foundation
Core
Senior
Staff
Design questions only
Narrow
Reliability
1
Caching
1
Transactions and locking
2
Concurrency
1
Real-time
1
Rate limiting and overload
1
Payments
1
3 pages
Design a UPI style payment rail
System design · Staff · 27 min
Payments
Transactions and locking
Reliability
Design IRCTC tatkal booking
System design · Senior · 25 min
Transactions and locking
Concurrency
Rate limiting and overload
Design live cricket score fan out
System design · Senior · 23 min
Real-time
Caching
