Answering frequently asked questions by junior data scientists and data scientists-to-be about first steps towards a DS career — In case you missed it, there’s a pandemic out there, and it forces all of us to shut down all public events. As time goes by, we all begin to understand the impact of the lockdowns, social distancing and absence of gatherings. One of the…

Make your awesome code conveniently available to the world, because you’re awesome too — This blogpost is now available in Polish too, read it on BulldogJob.pl About two years ago I published my very first data-science related blogpost. It was about Categorical Correlations, and I honestly thought no-one will find it useful. It was just experimental, and for myself. 1.7K …

Learn how to use ROC curves and AUC scores for more than just saying “I think this model performs well” — The ROC graphs generating code used in this post is available as part of the dython library, which can be found on my GitHub page. Examples seen in this post are also available as a notebook. Assessing the predictions of any machine-learning model is probably the most important task of…

Taking another step towards truly understanding the basics of Reinforcement Learning — Implementations of all algorithms discussed in this blogpost can be found on my GitHub page. The Qrash Course Series: Part 1: Introduction to Reinforcement Learning and Q-Learning Part 2: Policy Gradients and Actor-Critic The previous — and first — Qrash Course post took us from knowing pretty much nothing about…

How to perform valuable exploration for brand new items with nothing more than a simple trick on our items’ embeddings — This blog post was originally published on Taboola’s Engineering Blog. Our core business at Taboola is to provide the surfers-of-the-web with personalized content recommendations wherever they might surf. We do so using state of the art Deep Learning methods, which learn what to display to each user from our growing…

When interview-like challenges attack in real life, we save the day with math! — This blog post was originally published on Taboola’s Engineering Blog. If you happen to write code for a living, there’s a pretty good chance you’ve found yourself explaining another interviewer again how to reverse a linked list or how to tell if a string contains only digits. Usually, the necessity…

How I made my Reinforcement Learning agent perform better by making it stop going naively after the highest reward — The Tic-Tac-Toe game described in this post, as well as all algorithms and pre-trained models can be found on the tic_tac_toe repository on my GitHub page. When I’m being asked to describe what fascinates me so much about Reinforcement Learning, I usually explain that I see it as if I…