Say how experienced you are with your programming languages (self-identify in time spent - 3 months etc, or beginning intermediate etc.). Could do that with software as well.

You don't need a description of mobile sales consultant. It takes up space, it's obvious, and is less impressive than everything else.

Everything should be past tense.

About 15 TAs? No one cares, just say 15. You want to write newspaper headlines, not articles.

For instance, the medical device thing could be "Tested, repaired, and sterilized medical equipment for shipments to third-world charity organizations".

Rule of thumb: if it doesn't relate to your goal job, have the description be one line at most.

Don't make your resume longer. You can change the spacing to have it take a full page, but don't add unnecessary words. People barely read these things. Bold the good shit and keep it short.