Show HN: I couldn't afford interview prep, so I built a free alternative

A developer built a free interview-prep platform covering 16 topics for Google L4-L6 candidates after being unable to afford existing paid preparation tools. The site offers structured data structures and algorithms material, interactive visualizations, a Python playground, AI-powered feedback, and progress tracking, including a skill tree that maps prerequisites in learning order. The tool is organized into 8 data structures topics, 6 algorithms topics, and 2 concepts topics.

Google L4-L6 Prep 16 Topics Learning to pass the interview Structured prep covering the data structures and algorithms big-tech interviews expect. Interactive visualizations, a Python playground, AI-powered feedback, and progress tracking. Google Interview Readiness 0Just Starting Start practicing to build your score Not sure where to start? Follow the skill tree - learn concepts in the right order with prerequisites mapped out. View Learning Path 0/16 Topics Mastered 0 Challenges Solved 0 Active This Week Data Structures 8 topics 0% avg mastery Algorithms 6 topics 0% avg mastery Concepts 2 topics 0% avg mastery