Hi,
Thanks for your job posting. I can help you to build POS Terminal and migrating from existing POS to new terminal. I have developed numerous web applications in Python, Java, J2EE, JSP, PostgreSQL, MySQL, based on Linux, Windows etc.
Please initiate PM for details.
Please feel free to ask, if you have any queries or concern. I will be available to assist you.
Regards,
Harshvir Singh R