Lvl 2
Haolin Chen
@alpha_wizard55
Stack Builder
Total Score500 XP
Submissions12
Member SinceOct 2026
11Solved
Solved Challenges17%
Easy6/26
Medium4/31
Hard1/7
Practice Summary
Average Attempts
1.1
Success Rate
92%
Keep solving challenges to level up your score and ranks.
12 submissions in 2026
Max streak: 2 days•Current streak: 0 days
Total all-time: 12 submissions
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Recent Submissions
Showing last 10 of 11E-commerce Backend: Broken Checkout Flow
hard•150 XP Earned•22/22 tests passed
Oct 19, 2026View Submission ↗
User CRUD API — Part 1: Create, Update, Delete & Email Uniqueness
medium•50 XP Earned•6/6 tests passed
Oct 19, 2026View Submission ↗
Debug the Todo REST API
easy•25 XP Earned•13/13 tests passed
Oct 19, 2026View Submission ↗
Course Navigator
medium•50 XP Earned•6/6 tests passed
Oct 18, 2026View Submission ↗
Shopping List Manager
easy•25 XP Earned•5/5 tests passed
Oct 18, 2026View Submission ↗
Product Ranking Dashboard
medium•50 XP Earned•5/5 tests passed
Oct 16, 2026View Submission ↗
Reordering Items Mixes Up Their State
medium•50 XP Earned•4/4 tests passed
Oct 13, 2026View Submission ↗
Resize Listener Gone Wild
easy•25 XP Earned•3/3 tests passed
Oct 13, 2026View Submission ↗
Todo That Refuses to Update
easy•25 XP Earned•4/4 tests passed
Oct 13, 2026View Submission ↗
Broken Product Search
easy•25 XP Earned•5/5 tests passed
Oct 13, 2026View Submission ↗
Showing 10 of 11 submissions