Hi, my name is Jakub Sobolewski and this is

Building quality by testing

I’m a software engineer specialising in R with 5+ years of experience.
I practice automated testing to develop software more efficiently.
I share what I've learned

"[...] many thought provoking posts that he has on his blog [...]"

Eric Nantz, R Weekly Podcast, Issue 2024-W43

Explore what's new on the blog

An Introduction to Behavior-Driven Development in R
Learn how to use Behavior-Driven Development (BDD) in R to ensure your software meets user requirements through executable specifications.
Jul 4, 2025
8 min read
Keys To Scalable Code: Owning The Interfaces You Use
Learn how to build scalable and maintainable code by abstraction and information hiding, improving flexibility and ease of future changes.
Jan 23, 2025
4 min read
Acceptance Test-Driven Development with Shiny
Learn how to apply Acceptance Test-Driven Development (ATDD) to build robust Shiny applications using {shinytest2} and {selenider}.
Jan 22, 2025
2 min read