About DevPrep
DevPrep is a free, open interview preparation platform helping developers master coding interviews with real-world questions, structured learning paths, and in-depth technical articles.
Our Mission
Technical interviews shouldn't be gatekept behind expensive courses. DevPrep exists to democratize interview preparation by providing high-quality, structured content that covers Data Structures & Algorithms, System Design, Frontend Development, Machine Coding, and CS Theory — all in one place, for free.
Whether you're a fresh graduate preparing for your first interview or a senior engineer targeting FAANG companies, DevPrep provides the questions, articles, roadmaps, and learning tracks you need to succeed.
500+
Practice Questions
200+
Technical Articles
10+
Learning Tracks
100+
Glossary Terms
What We Stand For
Quality Content
Every question and article is curated for accuracy and relevance to real technical interviews at top companies.
Structured Learning
Follow learning tracks, roadmaps, and series designed to take you from fundamentals to advanced topics systematically.
Performance First
Built for speed with server-side rendering, edge caching, and zero layout shifts. Your prep time is precious — we don't waste it on loading spinners.
Privacy Respecting
No third-party trackers selling your data. Our first-party analytics help us improve the platform without compromising your privacy.
Community Driven
Comment on questions, share solutions, and learn from other developers preparing for the same challenges.
Free & Accessible
Core content is free forever. We believe quality interview prep should be accessible to every developer, everywhere.
What You'll Find on DevPrep
- Practice Questions — DSA, JavaScript, Machine Coding, System Design, and Frontend System Design questions with detailed solutions.
- Technical Articles — In-depth articles on programming concepts, design patterns, and interview strategies.
- Learning Tracks — Step-by-step structured courses from beginner to advanced.
- Roadmaps — Curated study plans for specific interview types and timelines.
- Concept Comparisons — Side-by-side analysis of commonly confused topics.
- Developer Tools — Big O calculator, JSON formatter, regex tester, and algorithm visualizer.
Contact Us
Have feedback, found a bug, or want to contribute content? We'd love to hear from you.
Reach us at hello@devprep.co
Ready to start preparing?
Jump into practice questions or explore our learning tracks.