To the best of my knowledge, posting to the Jobs page is a benefit of being a YC funded company.
But you can use the contact link at the bottom to ask the moderators.
There’s nothing wrong with posting your openings, and indicating their exact nature. If anyone has a problem, you can always remove the post.
It's impossible to get contributors for projects they don't use [1]. You need users. Once you get users you will get power users. Once you get power users, they may care and try to contribute.
As I said in a previous post, where are the examples?
Let's ask some questions:
What type of garbage colector? No/Manual? Reference counting? Tracing?
How do I loop 100 times?
Can I add "1"+2 ? The result is "12", 3 or an error?
[1] Except for very specific task, like fixing typos, or changing the GC, or rewriting the custom test method to use Github/codeberg/whatever actions.