What would you recommend to young developers for a better, more productive future career?

1 - Reduce notifications and other interruptions

2 - Focus on the essence and basics, not necessarily the new trends

3 - Advice with others

Ask the most experienced developer to review your PRs

4 - Be careful while deploying

Some of the skills required for developer are indeed soft skills, like thoroughness and accuracy.

5 - Learn git and other basic tools

6 - Keep in mind the unexpected, don't be so optimistic on your plans

7 - Know what you don't know

There is always something to learn.