Overview
Narrative
Annotated
Ride-Sharing Service
(Uber-class)
request → match → live tracking → payment · 20M riders · 1M concurrent drivers · 250K pings/s · 1.5M sockets
arrows
0/26
cards
14
letters
A–N
happy-path
side-effect
failure-comp
new-infra
▶
BOTE — canonical numbers
(every N- chip in the rail links here)
▶
Failure playbook (A–N)
▶
What breaks first · interview framing