Membrane keypad (store data)

Looking for a experienced freelance electronic/software engineer to design a custom made USB pin pad in cad or other slimier 3d diagram software, the applicant must fully install a electronic membrane to store data when input on key pad via internal flash memory. Applicant must be able to program software to download data from hardware via USB or Blueooth. I specify that I have the model (keypad) size and all measure.I just must to project it together with components that will signalized each press .I specify that electronic modul can be pulled out of keypad so it`s not a problem for the space . I specify that the key pad are fully silicone ! you can show a photo here. Thank you !