C++ on the back end of web app
My preferred approach to building angular apps is to use the back-end pretty much strictly as a REST server.
Here are a few places that list options:
I'm searching a cgi lib in C to build a restful web service
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How popular is C++ for making websites/web applications?
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One option that seems to come up multiple times is http://cppcms.com/. Also http://www.webtoolkit.eu
Integrating angular will be pretty much the same as integrating with any other back-end. If you're using the back-end as a REST server you can pretty much statically serve all of the angular code.