I’m not sure how lambda could help with the jump to mid level engineer. That’s up to you once you start at a job... the main issue I see is that one has to compete with actually scientists (PhDs) that have many years of formal education and work on addressing hard problems.

Also, exceeding the max number of credit hours while at university is a mistake. Classes should only be a part of a university experience. Good students takes advantage of the other opportunities such and internships and working in research groups. If you want more education then go to grad school.