Looking for a new work laptop. 2x mini pcie slots

I'm looking for a laptop for work. Its mostly software development, but we do some signal processing and the like. The big thing I'm looking for is the 2x mini pcie slots.

TIA

* **Total budget and country of purchase:** Flexible budget (2-3k), USA

* **Do you prefer a 2 in 1 form factor, good battery life or best specifications for the money? Pick or include any that apply.** best specifications

* **How important is weight and thinness to you?** Moderate to not really important.

* **Which OS do you require? Windows, Mac, Chrome OS, Linux.** Ubuntu, Windows

* **Do you have a preferred screen size? If indifferent, put N/A.** N/A

* **Are you doing any CAD/video editing/photo editing/gaming? List which programs/games you desire to run.** Software development, building of large projects (ex linux kernel), signal processing.

* **If you're gaming, do you have certain games you want to play? At what settings and FPS do you want?** N/A

* **Any specific requirements such as good keyboard, reliable build quality, touch-screen, finger-print reader, optical drive or good input devices (keyboard/touchpad)?**

>Required 1 mini/half mini pcie slot. Optimally one mini/half mini pcie + 1 (full) mini pcie slot. > 16+ gigs ram. > Recent i7/i9 (gen 9/10). > 1TB SSD or accessible to change (sata or m.2).

> USB3 or Thunderbolt 3 (want a hub with 2x 4k monitors so it might need to be thunderbolt 3, im not sure if USB3 can handle that or not)

* **Leave any finishing thoughts here that you may feel are necessary and beneficial to the discussion.** The pcie slots are the hard thing to search for.