Prepare for technical interviews through the natural evolution of algorithms. Don’t just solve problems—unlock each one from what you learned before.
Algorithms and the Data Science & Machine Learning path are available now. SQL & Data is growing next.
Progressive data structures and algorithms for technical interviews.
Explore the pathAvailable nowComplete unfinished ML repositories in realistic pair-coding simulations.
Try the interview labRelational thinking, interview SQL, and practical pandas workflows.
Every new branch is supported by what you learned before.
Build knowledge that compounds: fundamentals support reusable patterns, and reusable patterns unlock harder problems. Every new skill stays connected to what you already understand.
Big-O, arrays, and the language of algorithms.
Ideas you can recognize and reproduce under pressure.
Progressive problems turn understanding into independence.
Jumping into a random problem set teaches you that one problem. A structured path teaches you the pattern underneath it — so the next problem gets easier instead of harder.
Every topic builds on what came before, so you're never dropped into something three steps ahead of what you know.
Read the idea, see it visualized, then write it yourself — instead of reverse-engineering a pattern from a solution you looked up.
Run your code against real test cases in the browser — not just a green checkmark for "it compiled."