My blog https://xeiaso.net (source code: https://github.com/Xe/site) and the stuff I've written for it ended up doing several things to help me get employed over the years:

1. Letting me have a place to write to get better at writing, which makes it easier to do my job in DevRel.

2. Lets me talk about all of the interesting projects I work on (eg: an AI novel writing experiment https://xeiaso.net/videos/2023/ai-hackathon/) that people regularly find interesting. This gets people interested in wanting to employ me, which ends up working up well for me in the long run.

Do side projects, but write about what you did and what you learned.