Friends and myself are thinking about moving.
Check RunKeeper and box.net as my favorite companies, but have a look at AngelList: https://angel.co/boston/jobs
Check out http://venturefizz.com/, http://tech.co/city/boston, http://bostinno.streetwise.co/, and https://www.shegeeksout.com/. These publications/groups always have tons of relevant job postings. I'd also encourage you to attend events that interest you or relate to your professional aspirations. Boston has a large, engaged start up community so you can make lots of great connections meeting new people face to face that this sometimes (I think often) can lead to a job.
A question and answer community for people thinking about moving to a new city
and locals who are proud to help their new neighbours out.