At least 50% of my job at Heroku involves projects that make send "Maintenance required on your Postgres add-on" emails. I've been working in the industry for over 15 years, 7 of them working deep in the PostgreSQL-as-a-service space at Heroku. Prior to that, I was your standard Ruby on Rails developer who quickly gained an appreciation for systems work, scalability, and performance optimization.
P.S. I'm bad at writing bios so just find me at the conference and say "hi"!