C,it all depends on why you want to change (type of work / salary/ boss), and of what you expect.With 2.5 years of experience you might have difficulties to be able to reach the second level of the bigger firms directly. They will be looking in more detail at your experience, esp. that of the smaller firm, to see if that matches, and that you are able to work efficiently first day on. If however, you want to shift from the type of work you are doing right now, then this will be quite hard...Most probably, they will make you 'last year' first level, so that they will reduce their risk and you will have the extra carrot hanging in front of your head to get you motivated to be promoted next year.