Jul 10
Design a URL shortener like Bitly
Designing a URL shortener like Bitly is a classic beginner system design interview question. It involves creating a service that turns lengthy URLs i...
2 min read
Writing
Notes on systems, LLMs, and the industry building them.
I'm Wenhao, a software engineer. I write up system design problems I've worked through, what I'm learning about LLMs, notes from shipping side projects like ResumeMatch, and the occasional take on layoffs and where the industry is heading.
22 postsSince 2025