Marcin Wosinek

62 followers

I'm a JavaScript developer with more than 10 years of experience. I'm here to teach you useful skills, so you can succeed in your work & private projects.

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How to get a pay raise in IT

Jan 19, 20225 min read

Also available in 🇪🇸Spanish & 🇵🇱Polish We all know that tech is a pretty good career money-wise. Still, you can do yourself a disservice by sticking to lower pay than one company might offer. Even a tiny difference in pay becomes an impressive am...

How to get a pay raise in IT

How to learn while working on personal projects

Jan 13, 20225 min read

Also available in 🇵🇱 Polish and 🇪🇸Spanish A standard piece of advice for beginner programmers is that you learn most effectively when working on your personal projects. It’s good advice, but you can find yourself struggling to follow it—especiall...

How to learn while working on personal projects

How to use native ES modules

Dec 22, 20215 min read

This article will present examples of ECMAScript (ES) modules—what you can achieve with them and where you will hit some limitations. All browsers released after May 2018 support ES modules, so you can assume they are safe to use in most cases. sour...

How to use native ES modules

What’s the point of unit tests?

Dec 19, 20213 min read

As a junior programmer, you might be confused by unit tests. To make things worse, tests used as examples often make their purpose more unclear. When you see stuff like you are right to doubt whether there is a solid reason to spend any time writing...

How to evaluate your current workplace

Nov 29, 20218 min read

As you can read in many places, there are a lot of opportunities for IT specialists to find new work right now. No matter what you decide - either staying in the same company or searching for something else - it makes a lot of sense to evaluate your ...

How to learn data modeling

Nov 5, 20215 min read

If you want to turn your program idea into some reality, you need to model the data you will work with first. It doesn't matter how you are going to implement the system - the limitations are pretty similar, no matter if we: build classes in any pro...