On wage negotiations: the big corp offer and your current wage as per negotiations are unrelated. You can use the offer as a datapoint as you estimate your own

On wage negotiations: the big corp offer and your current wage as per negotiations are unrelated. You can use the offer as a datapoint as you estimate your own worth but you cannot use it as a rationale to ask for a wage increase. You can always ask for more. I'm not sure what the situation with the big corp offer is but if you want to move I would use the initial offer as merely as an anchor point and ask for more (as much money that the decision to move does not feel wrong). Negotiate, point out your value. I don't know where your salary would rise faster. Be aware that some big corps keep people tenaciously on the wage level they are at. As per future career prospects - signaling that you are smart and get things done is always a good bet. This means that you should have a brief description of what you've achieved at your current project at the end of it. This means if you can't describe your experience as "achieved x at y which delivered value z" it's time to try to change your current assignment. If this red flag condition is not met then careerwise you could be doing worse. A well known reputable name in a CV creates a sense of positive familiarity, no doubt about it. It sounds to me you need to figure out what you want to do, formulate a plan how to achieve it, and observe at yearly intervals have your goals changed and is your plan working. Figuring out ones career is an empirical and personal thing - the most important thing you can do about it is to be proactive and have a plan (that probably needs adjustments at intervals).