Course Plans

Quality courses created by data scientists in FAANGs.


  • AB Testing Course
  • Case-In-Point Course
  • SQL Drills
  • Statistics Question Bank
  • ML Question Bank
  • * Only 1 Lesson per each course


$ 57

  • AB Testing Course
  • Case-In-Point Course
  • SQL Drills
  • Mock Interview Videos
  • Statistics Question Bank
  • ML Question Bank
  • Slack Study Group

Premium Features

AB Testing Course

Core lessons on AB testing covering key concepts and interview questions asked in product data science interviews.

Case in Point

40+ case problems (i.e. How do you segment Apple customers?) with solutions written by data scientists in FAANGs.

Mock Interview Videos

Watch 5 x 1-hour recordings of mock interviews of candidates tackling challenging questions with feedbacks provided.

Question Bank

Statistics and machine learning questions commonly asked in top companies.

Product SQL

Product SQL problem sets asked in technical phone screens and on-site rounds.

Slack Study Group

Network with a community of job candidates and data science instructors who work in FAANGs.

Learning Objectives

Fast track your success in DS+MLE interviews with quality contents.

Case in Point

Prep for open-ended business case problems covering statistics, machine learning and product-sense. 

Emulating an actual case interview, each problem includes a comprehensive solution with tips, candidate-interviewer dialogue, follow-up questions, and assessments. 

Mock Interviews

Watch 60-minute mock interviews based on technical rounds in top companies. The mock interviewers work at FAANGs, and interviewees are candidates preparing for interviews at top companies. 

Slack Community

Never prep alone. Ask questions about upcoming interviews and find mock interview buddies in the DataInterview Slack group! 

Meet the Instructor

Learn from the instructor who landed roles in PayPal and Google.

Dan Lee

Data Scientist@Google (& Ex-PayPal)

Frustrated about data science and ML engineer interviews? As someone who had been a candidate myself, I share your frustration. That’s why I created – a one-stop shop for preparing for data science and ML engineer interviews. After working five years as a data scientists across three companies – Booz Allen Hamilton, PayPal and Google, I have curated top-notch interview content designed to accelerate your progress in interviews at top companies. Work with me and land your dream role =D


The AB testing course contains 12+ core lessons (i.e. metric selection, sample size determination, decisioning) on online experimentations. The lessons are tailored towards job seekers preparing for product data science interviews.

The Case In Point includes business case problems asked in technical screenings. The problem sets include statistics, product and machine learning design. Each problem is thoroughly fleshed out with candidate illustrations and interviewer assessments.

The mock interviews are emulated based on technical screens at top startups and FAANGs. Each 60-minute video includes 40 minutes of Q&A and 20 minutes of solutions. The mock interview candidate is an actual candidate preparing for interviews at top companies, and the interviewer is a data scientist or machine learning engineer in FAANG companies.

New contents are published on the first day of every month.

Yes,  send an email to He will get back to you within 1 to 2 business days.

Yes, once you enroll in the Premium, you will be billed and your account will remain active on a monthly basis until you cancel your subscription.