I got my current robotics job, in a field I at the time had no experience in, because of this blog post I wrote:

https://biotinker.dev/posts/seismograph.html

It didn't get a ton of traction when I posted it on HN at the time

https://news.ycombinator.com/item?id=24138014

But something only needs to be seen by the one correct person to make a difference, and in my case it was.