Get un-rusty before your next interview
Algorithm problems in a real in-browser IDE, actual bugs to debug, system design case studies, and a mock interview simulator — no login, nothing saved anywhere but your own device.
Based on solved problems, quiz accuracy & mock rounds
Recommended Practice: Data Structures & Algorithms
Current score: 20%. Boost your readiness by practicing core concepts.
System Design Studio
Architect distributed systems: TinyURL, distributed rate limiters, caching & microservices.
Coding Challenges
Browser IDE with instant test evaluation and Big-O analysis.
Question Bank
17 structured questions across 10 categories with think-first practice.
Debugging Arena
Squash real bugs: memory leaks, async closures, and race conditions.
Mock Simulator
Full-length stage-based interviews with radar scoring & feedback.
30s Rapid Fire
Fast-paced timed drills testing instant algorithmic reflex speed.
Brain Training Games
20 free browser games — reflex, memory, chess, Sudoku, SQL, regex, and more.
Behavioral & STAR
Master leadership, conflict resolution, and project stories with STAR rubrics.
Domain Competency Breakdown
Progress calculated across practice ratings and coding submissions