{"slug": "show-hn-i-couldn-t-afford-interview-prep-so-i-built-a-free-alternative", "title": "Show HN: I couldn't afford interview prep, so I built a free alternative", "summary": "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.", "body_md": "Google L4-L6 Prep\n\n16 Topics\n\n# Learning to pass\n\nthe interview\n\nStructured prep covering the data structures and algorithms big-tech interviews expect. Interactive visualizations, a Python playground, AI-powered feedback, and progress tracking.\n\nGoogle Interview Readiness\n\n0Just Starting\n\nStart practicing to build your score\n\nNot sure where to start?\n\nFollow the skill tree - learn concepts in the right order with prerequisites mapped out.\n\nView Learning Path\n\n0/16\n\nTopics Mastered\n\n0\n\nChallenges Solved\n\n0\n\nActive This Week\n\n## Data Structures\n\n8 topics\n0% avg mastery\n\n## Algorithms\n\n6 topics\n0% avg mastery\n\n## Concepts\n\n2 topics\n0% avg mastery", "url": "https://wpnews.pro/news/show-hn-i-couldn-t-afford-interview-prep-so-i-built-a-free-alternative", "canonical_source": "https://learningto.co/", "published_at": "2026-09-10 14:10:02+00:00", "updated_at": "2026-09-10 14:45:04.880617+00:00", "lang": "en", "topics": ["ai-tools", "developer-tools"], "entities": ["Google"], "alternates": {"html": "https://wpnews.pro/news/show-hn-i-couldn-t-afford-interview-prep-so-i-built-a-free-alternative", "markdown": "https://wpnews.pro/news/show-hn-i-couldn-t-afford-interview-prep-so-i-built-a-free-alternative.md", "text": "https://wpnews.pro/news/show-hn-i-couldn-t-afford-interview-prep-so-i-built-a-free-alternative.txt", "jsonld": "https://wpnews.pro/news/show-hn-i-couldn-t-afford-interview-prep-so-i-built-a-free-alternative.jsonld"}}