I'm a (mostly) backend programmer, the majority of my work I do in PHP and Java, typically with a Postgres database.
I'm being very very unfair to Python by using it most of the time for admin scripts and cronjobs instead of "real" software.
Things that have made my professional life a happier one over the years include PHP 7, and Joda Time, and Guava. Also, git and JIRA, and JSON, and new Postgres versions, and UTF-8. And coffee.