Stack Overflow shares information about common developer technologies  and salaries in its annual survey.

Most of the developers have worked with either HTML/CSS or JavaScript. Even if they are the most common technologies, their salaries are not the highest.

Bash/Shell developers make the most money. They make more than $80,000 per year. Also well-paid technologies are Python and TypeScript.

The salaries of PHP developers, on the other hand, are the ones that are growing the most right now. The next group is C++ developers, whose salaries have also gone up by more than 25% in the last year.