This jobs portal should also include biz dev jobs like marketing and outreach etc. Developing won't work out if people don't use a product. Products like hive.blog, ecency and peakd are stable enough that there isn't much development needed in these.
What is needed is improving UX so that it is much easier for new users to get onboard. And yes, other products definitely need a lot more development.
No, but the Skills Matrix will be making a comeback once I figure out the logistics of it. That's more in line with what you're thinking.