During several interviews with recruiters, founders and CTO's, we realized that the main problem is that there are no people in companies who are ready to teach juniors. Experienced team members don’t have enough time for mentoring as they have to perform their tasks. It made us think that maybe there is an opportunity to create a service that can provide remote mentors to these companies. These distant mentors could teach juniors, review their code, answer some basic questions, help with dev tools and frameworks, etc.
Maybe you have experience of hiring a mentor for junior developers at your company? I've heard only from one company that they did that.