Training is part of the solution, but I truthfully don't think that can be driven by startups. We might not even be around years from now to receive the rewards

Training is part of the solution, but I truthfully don't think that can be driven by startups. We might not even be around years from now to receive the rewards from our investment in junior developers. More practically, I wouldn't feel right hiring junior developers when I don't think we'd be giving them the best training given our current staffing levels and product needs. Since we already have too few senior devs, I'm not sure I could justifiably ask the team to take on the additional burden of mentoring junior developers (though I do hope we can start a robust training program once the dev team is a bit larger).