Proto.Engineer VS Practice.dev

• Written lessons
  390 lessons across 13 courses, taught from first principles. Every written lesson is free with an account.
• Timed interview practice
  Each problem runs on a real interview clock: 15 min easy, 25 medium, 40 hard, 90 design.
• Five languages
  Write and run practice solutions in five programming languages.
• Change requests
  Design problems where your design is done, then the requirement changes, like real design rounds.
• Heart line method
  Each algorithm is taught around the one line its solution turns on, so you can rebuild the rest.
• Proto Pair
  Solve the same problem every day for 14 days with a friend.
• Video episodes
  30 free DSA episodes, built from first principles.

• Interactive Learning
  Practice.dev offers an interactive learning environment that allows developers to practice coding in real-time, which can be more engaging and effective than passive learning methods.
• Real-World Scenarios
  The platform provides scenarios that mimic real-world problems, helping users to apply their skills in practical situations and preparing them for actual development tasks.
• Skill Development
  Users can improve their coding skills by working through challenging exercises and receiving feedback, which helps in strengthening problem-solving and coding abilities.
• Wide Range of Topics
  The platform covers a variety of programming topics and technologies, making it suitable for developers looking to learn or improve upon specific skills.
• Immediate Feedback
  Practice.dev provides immediate feedback on exercises, allowing users to learn from their mistakes and understand solutions more effectively.

Possible disadvantages

• Subscription Cost
  The platform may require a subscription for full access to its features, which could be a barrier for some users, especially students or beginners with limited budgets.
• Learning Curve
  Beginners might find some of the exercises challenging if they lack foundational knowledge, potentially leading to frustration without adequate support or guidance.
• Limited Offline Access
  As an online tool, Practice.dev relies on an internet connection, which might limit accessibility for users who wish to practice coding offline.
• Varied Exercise Quality
  The quality and relevance of exercises can vary, potentially leading to an inconsistent learning experience if some scenarios are not well-constructed.
• Dependency on Platform
  Since users practice within the platform's environment, there might be a dependency on its tools and setup, which might not perfectly simulate all development environments.

Proto.Engineer: we teach approaches, not solutions

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Tracking Proto.Engineer since Oct 2026.

• What is your job and how much do you get paid?

  If you want to benchmark yourself when you learn React. I’ve completed most of the medium/hard react problems at https://practice.dev to get my job. Source: almost 5 years ago

• I created an IDE in the browser with real-time collaboration

  It took me a few months to build practice.dev. Here I extracted the IDE and added live collaboration and npm resolver. It took me 1 week to release live-ide.dev. Source: about 5 years ago

• practice.dev - I am creating better FreeCodeCamp

  The idea of practice.dev is to create basics tutorials (currently it's in progress) similar to FreeCodeCamp, and create hundreds of challenges with greater difficulty. Think of it like leetcode/codewars for frontend. Source: about 5 years ago