There aren't any plugins for us explicitly, but since we're written in C# that would probably be the best case to start with. I don't see any reason why you couldn't use Jenkins, but to my knowledge there's no documentation to show it has been used before.
There is currently no documented way or support for an automated build process (to create Pega Robotics deployment packages). If this is functionality you require, I would suggest making a product request through your account management to get it added to the pipeline.
Aravind, I have created a custom build script which I use to both pull the latest code down from TFS/Git and then run a small command-line application that uses the "MSBuild.exe" very similar to what occurs within Visual Studio (in our case we're using VS2015 with the 8.0.1028 plug-in). It works very well, the only issue I have is that each time I run it the DeploymentVersion value is updated.
You can use the MSBuild plugin for Jenkins to build Pega projects. The build machine needs the pega visual studio plugin installed on it, along with msbuild. Once a Pega project is in the Jenkins workspace, MSBuild just needs to point to the solutions .sln file.
To get an understanding of how this works, I would recommend firing up command prompt, navigating to the directory your automation lives on your development machine, and invoking MSBuild on the .sln file to see how the build process works. You can also use the command
to see different command line arguments that you might need to pass (like whether or not to build in Debug or Release mode). Jenkins is essentially doing what you would be doing on the command line, and anything you can do from the command line you can do from Jenkins.