The "Ops" section actually consists of product development teams for features in GitLab itself (the Configure/Monitor "stages"), while the SREs are in the "Infrastructure" department. See https://about.gitlab.com/handbook/engineering/#engineering-d.... But yes, we don't seem to be hiring SREs at the moment, but I assume we'll add more openings in the beginning of next year.
Regarding DBAs, that job you posted is more of a normal Backend Engineer role with a database specialty. We also have dedicated Database Engineer roles:
- https://about.gitlab.com/job-families/engineering/database-e...
- https://about.gitlab.com/job-families/engineering/database-r...
The job description for SREs is here:
- https://about.gitlab.com/job-families/engineering/site-relia...