Radek Sienkiewicz

Hi, I'm Radek.

Above the surface: growth and conversion optimization consulting at Nextommerce.
Below the surface: reading books, playing basketball, fascinated by data science.
We all learn so many things every day. It would be a shame for all of it to go to waste. This is my attempt to share as much as possible.

Recent articles

A Challenging Year: 2021 with twelve 30-day challenges

Twelve monthly challenges, one for each month in 2021. Zero sugar, 50 push-ups per day, doing only "boring" stuff for a month, and everything in between.

Why do so many brands change their logos and look like everyone else?

Tech and fashion logos are becoming increasingly similar, all of them using sans serif fonts. Why do they do that? And why it doesn't make sense.

To get food, I learned Selenium and web scraping in one day. And I’m not even a programmer.

I couldn't buy groceries online because the waiting time for delivery was 2 months. I decided to automate the process of checking if any deliver slot opens up and then instantly booking it. I had to learn Selenium to do this. I succeeded.

How to read large files on a Mac (CSV, JSON, etc.)

Opening text files, even the big ones, should be easy. Even huge ones. It's just text after all. Turns out, it's surprisingly difficult and I had to dig to find out a good way to do it.

Recent books

More good stuff