What if I am a developer in the day job, but I don't code for the the startup, and the technology we use is totally different from my employer, will there be a IP concern?
As the article points out, you just can't work on your startup while at work at your day job. So if you're not answering emails, blogging, coding, testing, whatever, than you should be fine :-) Also check your non compete, some employers get a little crazy about it and may try to claim ownership of anything you do, even in your off time. Of course IANAL.