Learn Python for Coding Interviews
The data structures and algorithms every serious interview is built on, drilled until they are second nature. Built for developers and students preparing for technical interviews. You write real Python, run it in the browser, and watch it pass. No installs, no toy apps, no lectures.
11 projects, 275 hands-on levels, first project free.
Problems you will solve
- invert a binary tree and traverse a graph
- solve the classic two-pointer and sliding-window problems
- reason about time and space complexity out loud
By the end you can walk into an interview able to code the answer live, not just recognize it.
What you will build
- Foundations: code through algorithms
- Complexity, Arrays & Hashing
- Two Pointers & Sliding Window
- Stacks, Queues & Strings
- Binary Search & Sorting
- Linked Lists
- Trees & Binary Search Trees
- Heaps, Priority Queues & Tries
- Graphs & Advanced Graphs
- Recursion, Backtracking & Greedy
- Dynamic Programming + Capstone
Start the Coding Interviews track free.
Frequently asked questions
Do I need to know how to code to start Coding Interviews?
No. The Data Structures & Algorithms track starts from the fundamentals and builds up, and the first project is free.
Do I need to install anything?
No. Every level runs in your browser and is graded the moment your code works. No Python install, no setup.
What language will I write?
Python. You write real Python, run it, and get instant feedback across 275 hands-on levels.
Is it free to start?
Yes. The first project is free with no card. Unlimited access to all 33 tracks is $12 a month or $100 a year.