About

Deltaframe is a system design practice product. Solve real problems, get an honest evaluation, and review the concepts each attempt exposes until they stick.

Why we built it

Books teach patterns. Shipping teaches judgment. There’s no good middle ground between “read another article” and “wait years for the next staff-level project to hand you the lesson.” Practice exposes what you don’t know, but only if something measures the gap honestly and gets you to close it on a schedule. That’s what Deltaframe is.

How it works

Every design returns the two concepts most likely to cost you next time. Those go into a spaced-repetition review queue at expanding intervals (1, 3, 7, then 14 days), so concepts get refreshed just before you’d forget them. Two modes: Coaching (warmer, exploratory) and Interview Prep (strict scoring, time pressure). Switch whenever your situation changes.

Who’s building it

Deltaframe is a LuoForge product, built by an engineer who’s run this loop on themselves. No team yet — this is early. If you have feedback, the fastest way to reach us is the support page.