I've got a Synology with 2x 4TB as main storage for backups, fotos and time machine for my macs.
Otherwise I run a mini pc (dell optiplex i5 8xxx, 32GB RAM, 2 TB SSDs) with proxmox hosting multiple VMs for pihole, home assistant, zigbee2mqtt, nodered and some other stuff, partly on docker, partly on VM.
And lastly I run my old gaming pc as a development / tinker server with proxmox, currently playing around with bare metal Kubernetes and some other stuff.
edit: updated specs of mini pc
At work it's mostly python, .net core and javascript (regrettably).
Personally, I used to write a lot in C and C++ for embedded, but recently diving more into other areas. Developing quite the love for Golang (GO) and it's simplicity.