Coinbase Frontend Technical Interview Guide (2025 Edition)

🧠 Struggling to prepare for Coinbase Frontend Interviews?

This guide breaks down exactly what you’ll face in their technical rounds—real JavaScript debugging tasks, React.js implementation challenges, and async logic—based on actual interview patterns from LeetCode discussions and candidate reports.

🔍 What’s Inside?

✅ Round 1: JavaScript Debugging

• String validation (e.g., numeric checks, range filters)
• API fetching with fetch()/axios + error handling
• Form control (disabling buttons dynamically)
• Async log handling with setInterval
• Promises in loops (classic interview gotchas!)
• Data-driven UI rendering (fetch → render sidebar)

✅ Round 2: React.js Implementation

• Build a dropdown matching Coinbase Pro’s UI (with screenshots!)
• State management, click-outside detection, accessibility
• Follow-ups: close the dropdown when clicking outside

✅ Every Problem Includes:

• Complete solutions (JS + React)
• What they’re testing: Scalability, clean code, and DOM/React internals knowledge.

🧪 Perfect For:

• Frontend engineers (New Grad to Mid-Level)