Pick your track
A curriculum, not a card pile. Work through it module by module.
new grad / junior
Get in the door
~25h · fundamentals-heavy. Patterns, warm-up problems, Big O, SQL and security basics, one story per behavioral theme.
01 · patterns to recognize first
02 · warm-up problems
03 · big o essentials
04 · systems basics
+ 4 more modules
mid-level
Level up the loop
~60h · adds system design building blocks, API/database design, production techniques, deeper behavioral rubrics.
01 · core patterns
02 · medium problems across patterns
03 · system design building blocks
04 · starter sd prompts
+ 17 more modules
senior / staff
Own the room
~120h · design deep dives, evolving scenarios, tradeoff defenses, influence-level behavioral.
01 · all 22 patterns
02 · hard problems
03 · full sd prompt bank
04 · all production techniques
+ 14 more modules