Matt Wang

LeetCode Study Note | Problem 355: Design Twitter

Core Goal Implement a simplified Twitter with: postTweet(userId, tweetId) follow(followerId, followeeId) unfollow(followerId, followeeId) getNewsFeed(

Administrator Administrator Published on 2026-02-28

Architecture and Design of a Banking AI Assistant

This note summarizes the system design and technical insights from building a banking customer service assistant powered by retrieval-augmented genera

Administrator Administrator Published on 2025-07-13

Designing a Proximity Service (Yelp, Google Places)

📌 1️⃣ Introduction Proximity Service is a key component in many modern applications: Yelp: Find nearby restaurants and shops Google Places: Return ne

Administrator Administrator Published on 2025-05-31