LL90: Leo's LeetCode 90
Free coding interview prep guide for non-software engineers
LL90: Leo's LeetCode 90 launched on February 20, 2024 with 4 votes. The site was still online in September 2026, 2 years on.
What it does
A curated list of 90 coding questions tailored for roles adjacent to Software Engineering, such as Research Engineer & ML Engineer. Designed to maximize learning efficiency. Includes easy to follow solutions and fun facts. Free & open source.
This list of 90 questions is designed to maximize learning efficiency by spreading questions on the same topic unless they are closely related, increasing the difficulty gradually but not strictly, and ensuring a good coverage of topics even if the whole list is not completed. It overlaps with popular lists like Grind75, Neetcode Roadmap, and LeetCode Top Interview 150. However, it focuses on questions that are more reasonable for Software Engineer-adjacent roles , such as Research Engineer, Research Scientist, Machine Learning and Computer Vision Engineer, and so on. Solutions are included. Expand the tabs to see them. I tried to keep them as clean and easy to follow as possible. This page…from isikdogan.github.io
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