When to use 家 vs 师 vs 员 vs 者 I'm translating my resume into Chinese so I can maybe apply for a Chinese job. 

There are a number of items on there where I'm not sure when to use 家, 师, 员, or 者.

Example, I developed a comics website, Hitting Trees with Sticks.com where I was the sole developer, designer, artist, and writer.

I translated it as this, but am not sure if I'm correct:

其他          Hitting Trees with Sticks.com, 漫画与艺术        四月‘12年到至今   
        唯一的网站开发人员，设计师，艺术家以及作者


Are there some rules I can use to determine when I should use which?
I'll just talk about my own understanding here.

家 says that someone is so professional and experienced, and may have reputation so that he/she can be regarded as a master or authority in his/her field, e.g. 武术家, which means a martial art master.

师 often emphasizes occupation or job, compare 画家 and 画师.

员 is usually related to staff or crew.

者 is formal, as Mike says, and also general.