Functional

• Long URL, generate unique shoretened url
• Short URL, redirect to original url
• (Optional) Custom url for users

Non-Functional

• high availability : available all the time, user must be redirected
• low latency : redirect should be fast (<10ms)
• consitency : 1 short url must only be mapped to 1 long url
• security : prevent abuse (rate limiter)

API Design

Define the APIs expected from the system. This is your chance to analyze and define the read and write paths so that you can come up with the high-level design...

High-Level Design

Describe the overall system architecture. Identify the main components needed to solve the problem end-to-end. Use the diagramming tool to create a block diagram.

Detailed Component Design

Deep dive into 2-3 key components. Explain how they work, how they scale, discuss tradeoffs, capacity, and any relevant algorithms or data structures.