Build a Rate Limiter
BuildMedium
Implement a rate limiting middleware that limits requests per IP address. Start with the provided skeleton and complete the implementation.
30m
1.5x XP
0 completed
Build a Todo API
BuildEasy
Create a simple REST API for managing todos. Implement CRUD operations with the provided Express app skeleton.
20m
1.0x XP
0 completed
Fix the Async/Await Bug
Bug FixMedium
An async function is not waiting for data to load before processing. Fix the promise handling issue.
20m
1.5x XP
0 completed
Fix the Middleware Order
Bug FixMedium
Authentication middleware is not protecting routes correctly. The order of middleware matters!
20m
1.5x XP
0 completed
Fix the Null Reference Bug
Bug FixEasy
A REST API endpoint is crashing with a null reference error. Find and fix the bug that occurs when optional user data is missing.
15m
1.0x XP
1 completed
The Mysterious Login Failures
DebugHardPremium
Users report intermittent login failures. The auth service works fine in development but fails randomly in production under load. Find and fix the race condition.
30m
2.0x XP
0 completed
The Shopping Cart Mystery
Bug FixEasy
Customers are complaining about wrong totals in their shopping carts! Some orders show $NaN, others have incorrect amounts. Can you find the bugs before Black Friday?
1.0x XP
0 completed