Just to understood, the team you joined was at what stage when they hired the agency? Like was it completely new startup that had capital but not enough man-power?
How big the MVP was? From what I understand it seems more like full blown product that the company wanted to develop?
The MVP being built was the foundation for a totally new direction the company was heading. The team I joined was the beginning of transition from agency to in-house, and we had to convert this scrappy MVP into production ready to handle 1000s of customers.
The agency built a wooden bicycle which we had to convert into metal...while still riding it :-)