Dr EJ Kim

Hi, I'm Esther Jun Kim.
I enjoy building products for people.

Build. Test. Learn. Repeat.

UX Researcher

I discover user needs, test with users early and often, and make informed design decisions from user data.


I write code for a variety of applications, e.g. web, mobile, data science, and more.


I make things—including open source demos and hacks—which you can find on this website.

Learn more about me

Latest post

My experience with the HackerBox Autosport kit
03 July 2017

HackerBoxes is a DIY electronics monthly subscription service ($44 per month), where the contents of each monthly box are a surprise. It's also possible to purchase past boxes for a slightly higher fee ($59 per box), which is great if you want to try out a kit where its contents are already known. That's what I opted to do when I purchased the Autosport kit. And overall, I thought it was really great...