Ask HN: How do you use Apache Beam at work?

I haven't, but being an Apache project that isn't heavily commercialized by one of the big players, it's very likely if you shot a message to user@ (https://beam.apache.org/community/contact-us/) you'd get a decent answer from real users.

They seem to have an admirable level of community outreach - this coming from someone who used to work a lot with Big-Data Apache projects :) Having a YouTube channel and that many meetups in different locations is really cool.