This is the employee view. You find the open opportunities in your company on your dashboard under Discover opportunities. You can filter by skills, location, or type. Every opportunity shows your match, so you can see what fits you.
To apply, you open an opportunity and send your application. The responsible people see your profile and your skills. You can add a short message. This helps especially when your match is low and you still fit. You can always apply.

Who sees your application: only the responsible person for the opportunity sees it, together with your public profile and your skills. The names of the people reviewing are not shown to you.
Once you have sent the application, you get a confirmation by email. The responsible person reviews your profile and lets you know how things move on. You can check the status of your application at any time, and you can withdraw it.