OfferLab builds courses from one thing: years of one on one coaching that took data science and machine learning candidates into US offers, and that coaching still runs today.

Every course is organized the way interviews actually happen, round by round. The material is concrete on purpose. Real datasets, measured numbers, verified solution notebooks, and quizzes where every wrong option is a mistake a real candidate made. Courses ship in English and Simplified Chinese, taught natively in each language.

Our courses use Ada, an AI assisted presenter, with the same production quality across every lesson. Every claim in the material comes from real coaching and real measurements, and each course says exactly what was measured and where.

The catalog, four courses. Cracking the US Data Science & ML Interview covers the whole loop round by round. NLP to LLMs rebuilds what sits underneath the API. The US Tech Interview: Behavioral, Communication, Offer handles the half of the loop that is not technical. The ML System Design Interview goes to senior depth on the round that decides those offers. Each stands on its own; take them in whatever order fits what you are preparing for.

Start with the free module of any course. You will know within twenty minutes whether the depth is right for you.