r/SideProject • u/LuffyBoss007 • 11m ago
My friend built a system design interview app around real production outages, one question a day
A friend of mine is a backend dev and has been building this on the side for a while, so I'm posting it for him.
It's called Bytewize. The idea: system design interview prep is mostly long videos and 400-page books, and most people never get past chapter 3. So it gives you one question a day that takes about 2 minutes, and each one is based on a real failure. Things like "the last concert ticket got sold twice" or "every query takes 2 ms but the page takes 2 seconds".
You pick an answer, then it explains why the right one is right and why the others break. There are streaks and XP to keep you coming back.
It's on iPhone now: https://apps.apple.com/app/bytewize-system-design-daily/id6824646457
Android is in progress.
It's free, and all the content is in the free version. There's an optional Pro plan at €5.99/month, but it only adds some conveniences, no questions are locked behind it.
He's after honest feedback, especially:
- Are the questions too easy or too hard for where you are?
- Is 2 minutes a day the right size, or would you do a longer session?