Daily drop
A fresh challenge every day, plus a tour with one drill from every mode.
Twenty-plus drill modes
Pattern triage, solving and writing code, Big O, SQL, code review, debugging, API design, security, and OOP.
Behavioral
STAR-style prompts with rubrics — the rounds you can’t skip.
System design
Component picks, facet-by-facet deep dives, evolving scale scenarios, and tradeoff cards.
Mock interviews
Timed mixed-mode sessions with an end-of-session report on what to drill next.
Study tracks & library
Curated junior, mid, and senior curricula, backed by a cross-linked reference library.