I worked at A10 Networks full-time (More than a year)
Loved the product. Learned very much about the sales process.
Direct manager didn't provide support when working with a difficult coworker. The company was slow to innovate toward a cloud DDoS offering. Marketing was bad.
Advice to Management
If you're a manager, then manage your employees and situations. Don't take a hands off approach.
I applied online. I interviewed at A10 Networks.
Be prepared to have in-depth knowledge of everything that you have put on your resume. Questions can be asked on anything, as they expect people who are seriously committed to the area they are pursuing.