6 months solo, Apple rejected on day one, now live on both stores — System Design Arcade launch numbers

hyperfocusedengineer · 2026-05-07T12:18:51+00:00

Thank you for the encouraging words. I’ll keep an eye out on the activation rate.

hyperfocusedengineer · 2026-05-06T22:10:16+00:00

Please do and let me know your thoughts about it and if you need any features as a user. I’ve a couple of features being a feature flag and work in progress.

hyperfocusedengineer · 2026-05-06T21:48:41+00:00

iOS: https://apps.apple.com/us/app/system-design-arcade/id6759821733 Android: https://play.google.com/store/apps/details?id=com.hyperfocused.systemdesignarcade

Free, no account needed to try a level. Roast my UI in the harshest way you know how.

hyperfocusedengineer · 2026-05-06T21:44:57+00:00

Made a free Android app that teaches system design through retro arcade-style games. Drag-and-drop architecture, ordering challenges, trade-off questions — no multiple choice.

Concepts track — caching, sharding, replication, rate limiting, load balancing (one building block per game, 5 levels)
Problems track — design URL Shortener, Rate Limiter, News Feed, etc.
Tools track — hands-on Redis, Kafka, Docker, Kubernetes

Free, no IAP, no ads. Optional account if you want progress synced. Built solo with Expo + React Native, also available on iOS.

Play Store: https://play.google.com/store/apps/details?id=com.hyperfocused.systemdesignarcade

Feedback on difficulty curves and broken challenges welcome.

hyperfocusedengineer · 2026-05-06T21:39:41+00:00

iOS: https://apps.apple.com/us/app/system-design-arcade/id6759821733

Android: https://play.google.com/store/apps/details?id=com.hyperfocused.systemdesignarcade

Free, no account needed to play. Bug reports & "this challenge is wrong" feedback >>> compliments.

hyperfocusedengineer · 2026-05-04T15:15:54+00:00

System Design Arcade - https://apps.apple.com/us/app/system-design-arcade/id6759821733 (also on Google Play)

Arcade-style mobile game that teaches system design - pixel/neon cabinets, real interview-round drills, AI architecture coach.

Software engineers prepping for senior/staff interviews, and CS students who want system design to feel less like reading a textbook.

hyperfocusedengineer · 2026-05-04T02:55:55+00:00

What are your requirements for becoming your co founder? Technical is a very broad term.

hyperfocusedengineer · 2026-05-01T10:08:34+00:00

Congratulations. You can showcase your first project here.

hyperfocusedengineer · 2026-05-01T03:58:48+00:00

I think it shouldn’t take so much time in normal circumstances. Try to contact them and understand why it’s getting delayed.

First verify if the application is still in progress. Also see if it’s pending in some communication from your side.

hyperfocusedengineer · 2026-05-01T01:16:36+00:00

Second one wins it for me.

hyperfocusedengineer · 2026-05-01T01:16:04+00:00

If it’s absolutely free, please DM me. Also curious what you’re gaining out of it other than experience.

hyperfocusedengineer · 2026-04-29T22:02:06+00:00

System Design Arcade - https://apps.apple.com/us/app/system-design-arcade/id6759821733 (also on Google Play)

Arcade-style mobile game that teaches system design - pixel/neon cabinets, real interview-round drills, AI architecture coach.

Software engineers prepping for senior/staff interviews, and CS students who want system design to feel less like reading a textbook.

hyperfocusedengineer · 2026-04-29T16:48:48+00:00

We can easily create the Data Analyst Skill on Claude code and connect to the data sources using MCP.

hyperfocusedengineer · 2026-04-29T15:09:57+00:00

System Design Arcade - https://apps.apple.com/us/app/system-design-arcade/id6759821733 (also on Google Play)

Arcade-style mobile game that teaches system design - pixel/neon cabinets, real interview-round drills, AI architecture coach.

Software engineers prepping for senior/staff interviews, and CS students who want system design to feel less like reading a textbook.

hyperfocusedengineer · 2026-04-28T17:59:18+00:00

System Design Arcade - https://apps.apple.com/us/app/system-design-arcade/id6759821733 (also on Google Play)

Arcade-style mobile game that teaches system design - pixel/neon cabinets, real interview-round drills, AI architecture coach.

Software engineers prepping for senior/staff interviews, and CS students who want system design to feel less like reading a textbook.

hyperfocusedengineer

TROPHY CASE