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Master System Design & Engineering at Scale

Production-ready knowledge for modern developers. From Distributed Systems to Deep Learning, learn with battle-tested patterns.

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The Problem Vault

An interactive, pure-signal database of advanced algorithms and interview patterns. No filler, just extreme deep dives into the hardest problems.

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Distraction Free

A custom UI built purely for intense study. No sidebars or course navigation.

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Dynamic Filters

Instantly filter 100+ problems by exact patterns, difficulty, and concepts via SPA architecture.

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Multi-Language

Instant-switch tabbed solutions featuring production-grade Java and Go implementations.

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Popular Courses

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System Design

Design scalable distributed systems. From load balancing to database sharding.

18 Modules Advanced
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Data Structures & Algorithms

Master algorithms, complexity analysis, and ace technical interviews.

15 Modules Intermediate
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Generative AI

Build production AI applications with LLMs, RAG, and prompt engineering.

5 Modules Advanced
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Math for Machine Learning

Linear algebra, calculus, and probability foundations for ML.

6 Modules Beginner
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