As an accomplished software developer with a proven track record in creating custom solutions, I am enthusiastic about the opportunity to work on the project outlined by sandeepkumawat. With expertise in developing utilities for various platforms, I am confident in my ability to deliver a standalone utility that enables users to digitally sign PDF documents seamlessly across Windows, Mac, and Linux systems. My commitment to quality and attention to detail ensure that the utility will function flawlessly on all platforms, providing users with a seamless experience. By choosing to work with me, sandeepkumawat can rest assured that the project will be completed with excellence and efficiency.