HeaukJun Yoo
I'm a full-stack engineer in Seoul.
I started out writing C for network security appliances — a proxy server that every packet of a company's traffic passed through. For close to four years I worked down at that level, in Linux and networks.
Then I moved to startups and took on backend and infrastructure. Mostly that meant keeping servers up while the app grew, but it kept spreading: client features, then payments and ads. These days it includes deciding what to build, which numbers to watch, and when to stop.
I keep notes here on problems I ran into at work. Probably more about the ones that went wrong than the ones that went well.
Work
- Yatav — Full-stack Dev Lead
I lead a team of five engineers and a designer at a 17-person startup. Since the pivot into AI security, my work has been turning the product into something sellable and operable.
- Levit — Software Engineer
I was the only engineer on a commerce app's app-tech squad, handling three products alone from the React Native client through the backend.
- Hilokal — Full-stack Engineer
Backend and infrastructure for a real-time voice app while it went from 150K to 2M users. I built client features too, and worked on ads and subscriptions.
- Monitorapp — Server Engineer
Built and maintained a proxy security server (SWG) in C, carrying all traffic for companies of a few thousand to ten thousand people.
Writing
Nothing published yet.