System Architecture
Live SimulationUsers
Load Balancer
API
Redis
PostgreSQL
- Throughput
- 42k RPS
- P95 Latency
- 128 ms
- Availability
- 99.99%
Interview prep that remembers for you
Build skills.
Break limits.
Ace the interview.
Lessons that check what you understood, review that brings it back before you forget, and realistic practice: coding, system design, AI/ML, and mock interviews.
342 lessons·178 coding problems·57 visualizations·3 kinds of mock interview
Try it
Solve a problem right here.
The same workspace you get inside: problem, editor, tests, and an interviewer beside you.
Features
Everything you need for the interview.
Lessons that stick
Short lessons with a knowledge check at the end and spaced review after.
DSA & Coding
Interview patterns and problems, run in a sandbox against hidden tests.
System Design
Architecture, capacity, data, and a simulator that shows designs under load.
AI & Machine Learning
ML fundamentals, LLMs, RAG, agents, evaluation, and production AI.
Mock Interviews
Coding, design, and behavioral rounds with an AI interviewer and feedback.
A plan for today
What is due, the next lesson, the next problem, spread over the weeks you have.
How it works
Built around how memory works.
01
Learn
A short lesson with a clear mental model.
02
Check
A few questions. All correct once and it is checked.
03
Remember
Questions return right before you would forget.
04
Practice
The linked problems and design questions.
05
Interview
Explain your thinking and get feedback.
One loop from first read to interview day.
Learn a concept, check that it landed, let spaced review keep it, then apply it in problems, design questions, and mock interviews. Today shows what to do next, and nothing is locked.