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This year changed a lot for me.

12 hrs ago • Eltsefon Mark

December 2025

The right mindset to get a data scientist interview

If you’re preparing for data science interviews and feeling frustrated, exhausted, or questioning your self-worth after a rejection - this post is for…

Dec 12, 2025 • Eltsefon Mark

November 2025

Interpretation does matter

Interpreting experiment results, whether you’re building a product, running a marketing campaign, or doing research, can be tricky.

Nov 12, 2025 • Eltsefon Mark

October 2025

How Not to Turn Your 1:1 into a 0:0

1:1s can be the most rewarding meetings - but they can also be wasted time.

Oct 17, 2025 • Eltsefon Mark

When intuition wins over A/B test?

When making choices that affect products, policies, or strategies, it’s important to understand not just what the data says, but how much trust we can…

Oct 1, 2025 • Eltsefon Mark

September 2025

What actually speed up your A/B Test

We all want to speed up our A/B tests and run them as fast as possible.

Sep 17, 2025 • Eltsefon Mark

August 2025

7 reasons why your experiments fail

When you first start working with experiments, it feels simple:

Aug 27, 2025 • Eltsefon Mark

What I actually Do as a Data Scientist.

It’s always interesting to peek into a data scientist’s calendar.

Aug 13, 2025 • Eltsefon Mark

July 2025

We've all heard about the massive compensation packages offered to top AI engineers to join Meta.

Jul 30, 2025 • Eltsefon Mark

June 2025

How to approach DS in 2025.

When it comes to learning something new, how you approach it really depends on your goal.

Jun 25, 2025 • Eltsefon Mark

May 2025

Whether you’re interviewing for ML engineer or sometimes even a data scientist position at a tiny bootstrap startup or one of the FAANGs, you’ll almost…

May 28, 2025 • Eltsefon Mark

Creating a CV is your second step in securing a job, right after honing your own skills and achievements.

May 7, 2025 • Eltsefon Mark

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