Hi,
I'm a senior C++ developer from Brazil, with more than 15 years of experience. A great part of this experience is as a team leader, when a great part of my work is to understand and integrate existing code, and review other people's code to fix bugs.
Unless your code is completely outside my areas of expertise -- and I will tell you so if it is the case -- I can help you in a very timely fashion.
Best regards,
Gustavo Schirmer dos Santos, PMP