You put it on your resume and make your bread doing other jobs or freelance work, where you are now the top candidate in the pile thanks to the work you've done with your publically available library where anyone can inspect the source and see your handiwork.
Engineers in tech always complain that there is no proof of good work, like someone in biochemistry with a stack of papers on their CV would have. Well, this is how you do it. You spend effort sharing ideas with the community knowing you won't necessarily make a dime off of them, just like the biochem person who doesn't get paid per paper, and not spend 100% of your personal efforts working for someone else in private on a for profit project you aren't at liberty to intimately discuss.
Engineers in tech always complain that there is no proof of good work, like someone in biochemistry with a stack of papers on their CV would have. Well, this is how you do it. You spend effort sharing ideas with the community knowing you won't necessarily make a dime off of them, just like the biochem person who doesn't get paid per paper, and not spend 100% of your personal efforts working for someone else in private on a for profit project you aren't at liberty to intimately discuss.