System DesignSoon
Broader architecture cases and tradeoff drills are coming next.
Continue Path →Frontend 30 DaysSoon
A guided daily challenge track for sharper frontend reps is on deck.
Start ChallengeTitle
Difficulty
Type
Tags
1. Restricted Textarea
EASY
BUILD
2. In-Memory Rate Limiter
MEDIUM
BUILD
3. Password Strength Tagger
EASY
BUILD
4. Live Search Filter
EASY
BUILD
5. Config Merge with Deletions
MEDIUM
BUILD
6. Debounced Search with Stale Response Protection
MEDIUM
BUILD
7. Fix the Broken Cache
HARD
DEBUG
8. Loading Save Button
EASY
BUILD
9. Cooldown Button
MEDIUM
BUILD
10. Virtualized List
HARD
BUILD
11. Responsive Card Grid
EASY
BUILD
12. Fix Accessibility Issues in a Form
MEDIUM
REVIEW
13. Add Keyboard Navigation to Dropdown
MEDIUM
EXTEND
14. Slow Dashboard — Find and Fix the Bottleneck
HARD
INVESTIGATE
15. Controlled Form with Validation
EASY
BUILD
16. Add Error Handling and Retry to Data Fetcher
MEDIUM
EXTEND
17. Notification Tray
MEDIUM
BUILD
18. Infinite Scroll Feed
HARD
BUILD