Debugging C++ Software for Runtime Issues

I'm in need of a proficient C++ programmer to assist me in rectifying some runtime errors I've been encountering in my software. The source code is available for modification.

Key Requirements:
- Expertise in C++ programming
- Proficient in identifying and fixing runtime errors, specifically unexpected behaviors
- Prior experience in software debugging
- Ability to work with provided source code

Please note that the nature of the issues are primarily unexpected behaviors during runtime. Your task will be to track down the cause of these anomalies and implement the necessary changes to the code to resolve them.