Design a Ride-Sharing Service

Requirements

A ride-sharing service connects a rider who needs a trip with a nearby available driver.

Functional:

• Drivers go online and send their location continuously.
• A rider requests a ride from A to B and sees nearby drivers and a fare estimate.
• The system matches the request to a driver, who accepts or declines.
• Both sides track the trip live; payment happens at the end.

Non-functional:

• Matching in seconds; location shown with a delay of a few seconds at most.
• No driver is assigned to two riders, and no rider gets two drivers.
• Available in busy cities during peaks.

Out of scope: payment internals (see the payment lesson), maps and routing engines, pooling.