Most startups I've applied to are Linux friendly.

I currently work for a fortune 100 and managed to get a Linux machine purchased as a "lab" machine.

I'm fully in control. IT doesn't even know it exists. I'm not allowed on the corporate network, but I managed to get some internal corporate access through another department's lab network (IT sanctioned) that has a VPN with a few routes to things like ticketing, time cards, and our internal wiki. Most of the stuff I need to do my job is in AWS and we are allowed to add home IPs to the security groups.

IT still gives me a MacBook. I use it like once every 6 months.

nixos-unstable is the only thing I will use currently.

I'm running bleeding edge stuff like the latest kernel, Hyprland nightly, my own "shell" built from Gnome components and lots of custom stuff using GJS (Gnome JavaScript).

If you get one, and you are free to do whatever on it, encrypt your drives like your job depends on it. I have a memorized passphrase, pin protected hardware key, and a key in TPM. No biometrics.

As far as other nice things to have:

• VPN: https://www.infradead.org/openconnect/ supports some common enterprise VPNs.
• Communication tools (Teams, WebEx, Zoom, Slack, etc.). I tend to have access to 90% of what I need. My team is thankfully accommodating for the couple features I have issues with. Make sure you test things like Screen Sharing especially in Wayland if you use it.
• VM: If you can get a corporate licensed image to run a corporate licensed version of Office, I recommend it. Office365 for web is missing a few features and often renders differently from native.
• Password Manager and encrypt everything. System is encrypted as previously stated. My home volume (BTRFS) is encrypted with a different key/passphrase. My work's sensitive files are encrypted yet again using rclone with different keys. I try to minimize attack surfaces by unlocking only what I need when I need it.
• Backups. I use rclone to backup to our corporate OneDrive. Nixos is immutable and I have it setup with impermanence where every reboot is like a fresh install if I didn't codify it my nixos-config which is tracked in git. I persist a few cache and setting directories in my home directory, but not much. I can restore my setup in like 20 minutes if I ever lost my machine.
• Virtual mic and camera for noise suppression and blurring for communication tools that don't have it built in.
• Evolution EWS works okay as an Exchange email client. I had to hunt some weird settings like tenant ID to get it to work. I've been using Webmail or Outlook in a VM more often though as of late.

I work in software dev as FYI. For the few issues I have, my team has more issues getting stuff working consistently on macOS for our project. I used that as a justification when requesting the laptop: my dev environment should closely match our runtime environment. Most of that is moot now since we use Nix flakes in our repos for local dev envs.