My extensive experience and proven track record in project management, combined with my strong Java and Spring Boot skills, make me the ideal candidate for your project. I have successfully managed and developed various intricate projects within budget and time constraints - from small-scale endeavors to large-scale implementations, just like what you're looking for. My deep understanding of not only the technology but also the intricacies of running software on different platforms will prove valuable in developing a robust Java module for your Windows-based systems.
Additionally, having worked extensively with POS systems in the past, I am well-versed in the communication protocols you've specified - Protocol 17 and Protocol 39. My keen attention to detail will ensure that this integration is seamlessly achieved, providing the continuity you need for your ongoing projects. I'm also enthusiastic about new experiences and thrive on challenges, which aligns perfectly with your requirement of professionals who have prior experience incorporating POS systems with management software.