Molecular Biology of the Cell is one of my all-time favorite books. Read it 15 years ago, rereading it now in the 7th (newest) edition. If someone has read the books you've listed, done the exercise and has a comprehensive understanding of the material, but no biology degree, only a passion for learning about cell biology, are there job options to keep feeding that passion?
Work/volunteer as a minimum wage software developer lab rat (or whatever your day job speciality is). There are plenty of labs that are in need of free labor when it comes to software/engineering support in general, just ask around.
If you're an experienced software developer, you can also just get a job as a software developer at any number of companies in pharma and biotech. No need to do it for free.
