System Design AI
Explore designs

Design preview

Design an Online Judge like LeetCode

Run strangers' code safely in single-use microVMs, return verdicts within 5 seconds, and rank 100,000 contestants live: one-hour boards for junior, senior and staff, with the theory behind them.

online-judgesandboxingfirecrackersqsleaderboardredisawsinterview-board

Shared by System Design AIOfficial

Outline of the design layout

Explore the complete design

Open the diagram and design notes, discuss trade-offs with the community, or make a private copy to build with Coach.

Checking your sign-in…