Every chapter is a figure you drive: predict what happens, run it, watch the machine react, and keep the picture. Built for interview preparation first, complete courses second.
Queues, caches, and consistency, enacted the same way: as figures that run.
COMING
IN PLANNING
AWS
The building blocks behind the console, from IAM to VPC networking.
COMING
IN PLANNING
Docker & Microservices
Images, layers, networks, and the failure modes of splitting a system.
COMING
IN PLANNING
C++
Memory, ownership, and the machine underneath the syntax.
COMING
INTERVIEW PREP MODE · BUILDS FIRST
Chapters ranked by how often they come up in real interviews, most-asked first, with gold stars for importance. Finish a chapter's levels and you can answer it cold.
COURSE MODE · FOLLOWS
The complete A to Z syllabus of each course, for learning from scratch in order. Opens once a course's interview tier is finished.
No account needed; progress saves on this device. See your progress.