Sebastian Witowski

I'm a software engineer with 8+ years of experience in full-stack development, operations, and project management. I've written code for both scientific institutions like the European Organization for Nuclear Research (CERN) and Fortune 500 companies. I specialize in Python, but I don't shy away from other languages. You can learn more about my experience on my LinkedIn profile.

In my spare time, I like to share my knowledge about Python, best practices in programming, and productivity. I've spoken at many conferences and meetups - have a look at some of my talks.

I've listed a few things that I can help you with on the consulting page. If you need a helping hand in your Python project or would like to organize a workshop, don't hesitate to contact me.

For Loop vs. List Comprehension

Sep 17, 2020

Simple "for loops" can be replaced with a list comprehension. But is it going to make our code faster? And what limitations list comprehension has?

Ordered Dictionaries

Sep 10, 2020

Dictionaries in the latest Python versions preserve the insertion order. So, is there any reason to use the OrderedDict as we used to do in the past?

Easy Speedup Wins With Numba

Sep 3, 2020

Numba library has plenty of tools to speed up your mathematical-heavy programs. From a simple @jit decorator, all the way to running your code on a CUDA GPU.

Find Item in a List

Aug 27, 2020

How to quickly find something in a collection of items, like a list or a range? When a generator expression is a great solution, and when it's not?

Ask for Forgiveness or Look Before You Leap?

Aug 19, 2020

Is it faster to "ask for forgiveness" or "look before you leap" in Python? And when it's better to use one over the other?

Writing Faster Python - Introduction

Aug 18, 2020

Introduction to the "Writing Faster Python" series. What it is about, how do I benchmark, frequently asked questions, and additional resources.

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I like to speak at conferences and meetups. If you'd like to have me present at yours, feel free to contact me.
Here are a few examples of my recent presentations: