A framework to prepare for interviews
How to use data to come up with ideas for new A/B tests and then actually test your hypothesis. That is, the main task of a product data scientist
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The best data science job interview resource since 2015. Updated in 2024.
Get ready for a data science interview
Includes the original "A collection of data science take-home challenges", with R and Python solutions
Product case studies about A/B testing, metrics, and insights
Reusable frameworks in SQL/Python/R for live coding interviews
More than 10K customers since 2015
This material helped get job offers at virtually any large tech company in the world
The only original one. Updated in 2024
Real data science
Data Challenges
Practice in advance on challenges just like the ones you will get in the interview, resembling what you will actually do at work
Product Case Studies
Learn how to answer the hardest product, metric, A/B testing on-site questions. Such as: Should we add a given new feature?, Which metric would you choose for this new feature?, etc.
Coding
Reusable solution frameworks for SQL/Python/R exercises just like what you will get in the on-site or shared-screen interview
“ This material helped me so much get a data scientist job at Facebook ”
Menghan Xu
Samples
Product Case Studies
See the lesson ->
A collection of data science take-home challenges
A/B Testing
Analyze data from a referral program test and draw conclusions about its effectiveness
See the challenge ->
Machine Learning
Use ML to improve recommendations and optimize user experience
See the challenge ->
Coding
“ I bought the material and as a result I got a job as a Data Scientist at Pinterest! ”
Dorna Bandari
Products and features
Interview Material
The original
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The original DS takehome challenges: 20 take-home challenges with real world data sets. 4 challenges have detailed solutions with reusable step by step code in Python and R
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40 DS product questions with answers. This is a subset of just 40 among all the product questions included in the full course. These 40 questions are introductory and more high-level, while the additional ones in the full course are harder and more applied
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3 sections on coding questions for DS interviews. Learn how to categorize coding questions and apply a reusable framework to each category, removing randomness from the live coding step. Includes SQL, Python, and R solutions to the hardest questions asked at top tech companies
Full Course in Product Data Science
The best seller
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Learn how to develop product sense, create metrics, and design robust A/B tests
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12 sections with more than 130 lessons and exercises leveraging real tech company tables (user table, event table, etc.). Code in Python, R, and SQL
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Includes everything in the interview material package + R/Python solutions for all the challenges (not just 4) + tons of additional DS Product Questions
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Unlimited 1:1 support from author throughout the course. Can ask any questions you have about the material or anything related to product data science
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Approved as an employee training expense by >200 companies
Gen AI Data Science
The future
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Includes tons of brand new Gen AI DS case studies, AI foundational knowledge, and real-world projects based on reverse-engineering the code of successful AI products
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Learn how Gen AI data scientists are designing the launch of Meta AI, Meta AI Studio, Google Overviews, OpenAI new models, and more
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Based on the real-world business experience of having sold an AI app to a Fortune 500 company (Colgate) as well as based on inside knowledge about Gen AI DS projects at a handful of top tech companies
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Straightforward approval as an employee training expense
“ Excellent resource for preparing for interviews. Very recommended. ”
Donja Darai, Sr. DS at eBay
I have been creating educational material related to data science since 2015. Firstly focusing on job interviews (A Collection of Data Science Take-Home Challenges, 40 Data Science Product Questions, DS Coding Course, now all combined into a single course) and, more recently, focusing on employee training (Full Course in Product Data Science and Gen AI Data Science).
The Full Course in Product Data Science was among the fastest courses ever to reach $1 million in sales on Teachable.
The main idea behind everything is to simulate/recreate the actual work data scientists do inside top tech companies.
Prior to all this, I worked as a data scientist for several Silicon Valley tech companies, the last one being Airbnb.
For any questions, use the popup form on this site or email info@datamasked.com