We generally have a policy of not communicating externally by default (way too many startups have failed because of loose lips and over-promising), but I'll answer with what's already known publicly. :-)
> How many people are in your company?
Around 70¹.
> Where in Norway are you located?
Oslo¹ (or you can search for reMarkable on google maps).
> Are you looking to increase the number of people working in your company? Planning to hire more software developers?
Yes, yes and yes. :-)
https://remarkable.com/careers
> [...] is everything that the community would need available in order to create a fully open source alternative “firmware” (or really, a “distro” might be a better name for it since it’s running a Linux kernel and all) that can run on your hardware?
It's just a completely standard Linux system, and as required we publish the source code for u-boot and Linux and whatnot, so yes.
I originally wanted to just run plain Debian on it (or ALARM), but it was easier to just start with a minimal system and put on as little as possible, especially when you're a single person trying to keep track of everything.
Now we've expanded the team a bit, and ideally we could upstream at least the kernel patches so we don't have to forward-port everything ourselves, but it's not a high priority unfortunately.
And we're still a relatively small team, it's a bit hard to find a lot of good kernel developers who want to switch jobs in Norway.
¹: https://www.dn.no/teknologi/teknologi/nettbrett/remarkable/r...