Windows Server, Linux Server, Proxmox, Arduino, mysql, no sql, golang, influx, grafana, elastic, openshift, pentaho data integration(Hitachi), CI, sitescope, postgresql, xml, sql server, etc.
The best freelancer I've ever worked with.
He took the difficult problem and solved it.
It took a while, but it got the solution that no one else did.
I will definitely hire your services again.