My materials probably took 4-6 hours to write the first draft (I did most of it over two evenings, maybe one more just skimming the questions to figure out what things to talk about for each question), probably 2-3 hours or so to edit, then probably another hours over an evening just skimming it too many times before I hit submit. My materials were 16 pages or so, some of that was the original document (which has been linked in this comment section).
It's a fair bit of writing to ask for, but for a mostly remote and prose-driven company, you do a lot of long-form writing in the day to day work. The public RFDs and github issues/comments/commits give a good flavor for this.
As others have said, lots of my work is open source, and I have public writings and talks, so finding those were much easier for me than it might be for someone with only closed source works.
My successful application took around 12 hours of writing and editing across 3 days, though I was lucky that most of my portfolio was already open source or otherwise public. Some people spend more, some spend less.
It is worth keeping in mind that we write a _lot_. If you don't enjoy the process of writing, you might not like working here.
It's a fair bit of writing to ask for, but for a mostly remote and prose-driven company, you do a lot of long-form writing in the day to day work. The public RFDs and github issues/comments/commits give a good flavor for this.
As others have said, lots of my work is open source, and I have public writings and talks, so finding those were much easier for me than it might be for someone with only closed source works.