The best way to answer this question is to put emphasis on growing with the company (he’s a good long-term hire) and taking on new challenges (he’s goal-oriented, proactive), not on a specific title or job description (he’s flexible).
Your response to “Where do you see yourself in five years?” is your opportunity to sell the interview on your commitment to the career path and the position.
“My goal right now is to find a position at a company where I can grow and take on new challenges over time. Ultimately, I’d like to assume more management responsibilities and get involved in product strategy. But most importantly, I want to work for an organization where I can build a career.”
This answer offers some insight into the candidate’s goals and interests (becoming a manager, being involved in product strategy) so it’s not too generic. This response also strongly expresses a desire for a long-term career with the company.
“I am driven to be the best at what I do and I want to work somewhere where I’ll have opportunities to develop my skills, take on interesting projects, and work with people I can really learn from. Some of the most innovative thinkers in the industry work here and that’s a big reason why I would love to build a career here.”