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.

Remove Duplicates From a List

Oct 22, 2020

What's the fastest way to remove duplicates from a list?

type() vs. isinstance()

Oct 15, 2020

What's the difference between type() and isinstance() methods, and which one is better for checking the type of an object?

Membership Testing

Oct 8, 2020

Why iterating over the whole list is a bad idea, what data structure is best for membership testing, and when it makes sense to use it?

Checking for True or False

Oct 1, 2020

How can we compare a variable to True or False, what's the difference between "is" and "==" operators, and what are truthy values?

Sorting Lists

Sep 24, 2020

What's the fastest way to sort a list? When can you use sort() and when you need to use sorted() instead?

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?

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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: