About me
I'm Jakub Sobolewski.
I’m a software engineer specializing in R with 5+ years of experience.
I believe automated testing is the key to building quality software.
My journey into R testing began with a project where to develop code, you had to be connected to the production environment. Turns out, it was a terrible developer experience.
I'm particularly passionate about knowledge sharing, which is why I maintain an active blog and R Tests Gallery. I believe that when we share our testing experiences—both successes and failures—we all become better developers.
I approach testing with a practical mindset: tests should make development faster and more confident, not slower and more burdensome. My goal is to help teams find testing strategies that actually enhance their workflow.
My open source projects
Muttest
A mutation testing framework for R. It helps you identify gaps in your test coverage by introducing small changes to your code and checking if your tests catch them.
Cucumber
A behavior-driven development (BDD) framework for R. It allows you to write human-readable tests that describe the behavior of your software.