Advice
Working at a start-up is different than working at an established business. You'll be fully accountable for the work you output whereas at a larger company perhaps you would be able divide the responsibility among members of your project team. You'll also be asked to do things you don't know how to do and other may not be familiar with. In other words, a start-up is a good work environment for the student that is a self-starter and proactive.
