Title? How’s this: My official title is missionary! But most people doing Christian ministry tend to be “people persons”, not techies, so my day-to-day work is helping a variety of ministries by doing website design/development, online database development, video editing, desktop publishing, basic tech support for how to do stuff on their computers, etc. (My favorite is back-end web dev and databases in PHP/MySQL.) I’m definitely a jack-of-all-trades-master-of-none, although my friends seem to think I’m a master of all. 
Yes, it’s frustrating to feel like I never get really good at anything - a new technology seems to come out every week, and I’m years behind and shallow in my knowledge. But there is never a shortage of work to do or of people who appreciate me! 