Why do you need something formal? Do you have a STEM degree? Or indeed any degree?
Courses don't need to be accredited to help get you a job though some online certificates might not be worth much more than simply stating you know X (udemy certs can be from literally anyone, coursera and EDX tend to be from good universities but can be watered down, they're generally cheap though), some bootcamps work with large employers and so are a known quantity for them... though if economic times are hard that might be riskier as they are expensive (could cost a few thousand) and bootcamp hires are "unconventional" vs regular graduate hires.
Udacity nano degrees might be a kind of happy medium between the shorter coursera & EDX courses vs a bootcamp, they're priced in between those two things too.
You could look at some distance learning degree modules if you want academic accreditation, if you already have a degree then maybe a graduate certificate or diploma might be sufficient... also if you were to sign up for a full degree part-time there is nothing stopping you from applying for jobs when part way through it, just list the modules you've already completed and when you're due to complete the full degree etc..
There probably are some vendor-related programming certificates if you want something quick, I guess that could be an option though I'm not sure what they're like.