About CodePeet
We're building the prep platform we wish we'd had.
Preparing for engineering interviews means juggling a dozen tabs — one site for DSA, another for system design, a course for SQL, a video playlist for frontend, and a chat room for when you're stuck at midnight. CodePeet brings all of it into one place, and adds the one thing none of them had: a mentor that's there 24/7.
Why we built CodePeet
Learning to be a great engineer shouldn't feel like assembling furniture with half the instructions missing. Yet that's what interview prep has quietly become — scattered across too many tools, expensive, and often lonely. You grind a hundred array problems in one place, start over from scratch somewhere else for system design, and never quite see how any of it connects.
We thought it should work differently. So we built CodePeet as a single home for the whole stack of modern engineering interviews — Data Structures & Algorithms, System Design, SQL, Frontend, Data and AI Engineering, and the Core CS underneath it all — where every track reinforces the next, and getting stuck never means getting stranded.
A mentor that never sleeps
The heart of CodePeet is its AI mentor, and it works in two modes. In Hint mode, it nudges — a question here, a direction there — so you keep doing the thinking and the breakthrough stays yours. In Mentor mode, it goes deeper: walking through the why, reviewing your approach, and closing the gap between “it works” and “that's the answer a senior engineer would give.”
It's there on every problem and every case study — at 9 a.m. before a phone screen, or 2 a.m. on a Sunday — and it's free.
What you can learn
CodePeet covers the full breadth of what technical interviews actually test — from your first data structure to designing systems at scale. Each track takes you from fundamentals to interview-ready with real problems, real case studies, and hands-on projects, not just theory.
What's inside
- 4,000+ DSA problems with progress analytics that show you exactly where you stand.
- 40+ real-world system design case studies, from URL shorteners to global-scale feeds.
- 50+ curated sheets, including Blind 75 and CodePeet 150–444, so you always know what to do next.
- SQL, Frontend, and Data Engineering courses built around hands-on projects.
- Community discussions where you can compare approaches and learn in the open.
Learn together, and give back
Great engineers are made in community, not in isolation. On CodePeet you can compare solutions, ask questions, and learn from people a few steps ahead of you.
And through our contribute-to-earn program, the people who make CodePeet better — by adding problems, writing explanations, and helping others — can earn while they do it. When the community grows, everyone levels up.
Who it's for
Whether you're a student chasing your first internship, a job-seeker preparing for the next offer, or a working engineer leveling up for a senior or staff role, CodePeet meets you where you are. Start with what you need today and grow into the rest — it's free to begin, and there's no credit card in the way.
Join 10,000+ learners building real skills.
Everything you need to go from practicing to interview-ready — in one place, with a mentor in your corner.