Linux/NixOS/Nix developer to setup infrastructure

We are looking for someone that has extensive experience with the Nix/Nixpkgs/NixOS and flakes ecosystem or
has good experience administering Linux system and is willing to learn the Nix ecosystem.
The right individual will use NixOS modules to configure various infrastructure. For example:
- Keycloack
- Nextcloud
- PostgreSQL
- Nginx

Tools:
source will be stored in git.
sops-nix will be used to manage secrets.
deploy-rs will be used to do the deploy
Wireguard will needed to connect to the server/VM

Please start your message with the current version of NixOS followed by `:`.