Rose, who joined YouView in May from the BBC, will remain connected to the company as a product development advisor.
YouView has not directly replaced Rose, but instead appointed Sef Tuma as head of technical delivery. Greg McCall will remain in post as launch director and Jeff Hunter will continue as chief architect.
In addition, former BT Vision operations director Andrew Burdess has joined YouView as director of operations, responsible for "developing all consumer facing aspects of the platform and ensuring technical resilience of back end services".
The technology team has already defined the core technical environment for the platform, which will aim to bring video on-demand and web services to Freeview and Freesat when it launches in the first half of next year.
A user interface has been created, along with a framework for content providers. All core technical specifications have also been agreed for firms developing YouView set top boxes.
YouView chief executive Richard Halton said that the technology team changes are intended to "ensure we deliver YouView in good time and in great shape".
"We are ensuring that in key project management areas such as technology and operations we are expanding capacity to ensure we meet the demands of this exciting project," said Halton.
"As we move into this next phase of our development I want to pay tribute to the brilliant work Anthony Rose has done to shape the consumer proposition and I am pleased that he has agreed to continue to advise the project.
"We are delighted Sef is being seconded into our leadership team. He has a hugely impressive track record of successfully delivering major integration projects in our industry. We now have a highly experienced technical delivery team committed to developing an exciting new service."