Over the past few months, I've been working on a project called CodeComplex (live at codecomplex.site).
It started with a simple observation: while platforms like LeetCode and HackerRank are great for learning algorithms, practicing solo in a static editor often lacks the urgency and pressure of real engineering scenarios like debugging broken legacy code or pairing under a deadline.
I wanted to build a platform that makes competitive coding feel dynamic, interactive, and closer to real-world development.
Here is a breakdown of what CodeComplex is, the engineering challenges I faced building it, and how it works under the hood.
What is CodeComplex?
