Who the hell works for a company (remotely or not) and uses their own equipment? I'm not a lawyer, of course, but a developer exposing their personal system to company data could be a significant liability risk to the company.
In particular, my last employer gave everyone the option to use an app[1] for easy access to email on their personal phones. I refused to install it, since it gave my (then) employer the ability to remotely wipe my phone at the press of a button.
[1]: https://play.google.com/store/apps/details?id=com.good.andro...