This interestingly follows my own career growth. I was the tech lead responsible for scalability/reliability at IMVU for a long time, but eventually our bottleneck clearly shifted from reliability back to marketing/product development. Around that time I switched teams, and have since been the tech lead for our marketing team. It might sound less sexy to other engineers, but getting to be on the bleeding edge of marketing for virtual economies is constantly challenging and fun; especially with IMVU's data driven culture.