SDE Prep

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Getting Started with SDE Prep ​

Welcome to SDE Prep — a curated set of battle-tested patterns, practical walkthroughs, and interview-ready materials designed to help you ace your software engineering interviews.

The Problem We Solve ​

The tech interview landscape is competitive and overwhelming. Instead of memorizing hundreds of random problems, we focus on the underlying patterns that solve entire classes of questions.

What You'll Find Inside ​

  • Coding Patterns: Master reusable techniques like Sliding Window, Two Pointers, and Tree Traversals.
  • Behavioral Guides: Learn to frame your experience and answer non-technical questions with impact.

How to Use SDE Prep Effectively ​

Quick Start Guide ​

  1. Explore the free patterns: Start with a foundational pattern like 'Sliding Window' to understand our teaching style.
  2. Sign up for an account: Create a free account to get updates and prepare for premium access.
  3. Upgrade to unlock everything: Get immediate access to all patterns, guides, and system design content.

Understanding Our Content Structure ​

Our philosophy is built on pattern-based learning. For each pattern, you will find:

  • A clear explanation of the core idea.
  • A code template you can adapt.
  • A set of practice problems where the pattern applies.

Free vs. Premium Content

We offer a substantial amount of content for free, including foundational coding patterns, so you can experience the value firsthand. Upgrading to a Premium Membership unlocks all advanced patterns, system design deep-dives, and our complete behavioral interview section.

How Account Access Works ​

  • Creating an Account: You can sign up or sign in using the button in the top navigation. An account is required to purchase and access premium content.
  • Purchasing Premium: Click on any "Upgrade" button. You'll be directed to a secure checkout page managed by Lemon Squeezy.
  • Already Purchased? Redeem Your Access: If you've already paid but the site doesn't reflect your access, don't worry. This can happen if you purchase on one device and sign in on another. Just click the "Redeem Access" link on the upgrade page. We'll check your account email against purchase records and unlock your content instantly.
  1. Work through the coding patterns sequentially.
  2. For each pattern, read the theory, then attempt the example problems before looking at the solution.
  3. Don't neglect the behavioral section—it's just as important!

Who Is This For? ​

Whether you're a new graduate, a self-taught engineer, or an experienced SDE looking to level up at a top tech company, these materials are built for you.