I am currently managing a team of 10 people for a project which was started 3 years ago, which will run for another year. I am not the manager, I am just the most senior developer (6yrs exp.) on the team who needs to do this until the company finds a real project manager.
In our team, there are 3-4 developers who have been working on this project for the last two and half years.
These developers are highly demotivated and it's really affecting their work. I personally think that they can do better than what they are currently doing.
When I asked them about reasons, they simply said that they have been on this project for a very long time hence now they want to work on some other projects or on some XYZ technologies.
I neither have the authority to move them onto another project nor would I like to do so because they know the project inside-out.
Any suggestions on how can I motivate them?