Yoda Response: Sure, Avi. One instance that comes to mind is when I was working on the HSBC Banking application. We needed to integrate a third-party library for QR code scanning and another proprietary software for secure transactions.

The challenges we faced included compatibility issues and ensuring the security of sensitive financial data. The third-party library for QR code scanning was not optimized for all devices, which led to performance issues on lower-end models. To address this, I had to dive into the library's source code and make necessary optimizations.

For the proprietary software, the main challenge was ensuring seamless integration while maintaining compliance with stringent security protocols. We used SSL pinning and encrypted data storage to secure transactions. Additionally, extensive testing was conducted to ensure that the integration did not introduce any vulnerabilities.

Overall, the experience taught me the importance of thorough testing and the need to be adaptable when working with third-party libraries and proprietary software.