Hi, I'm a software and database designer/developer with more than 35 years of experience. The past 20 years I was full-time employed (in-situ) by two international organizations; IATTC (San Diego, CA), and the Food and Agriculture Organization (FAO) of the United Nations (Victoria, Seychelles). I'm currently retired, and staying busy, and up-to-date, doing some freelancing, so I have enough free time to dedicate to your project.
I have extensive experience with MS SQL Server (Transact SQL), Oracle's 11g Server (PL/SQL), Firebird, PostgreSQL, and mySQL, and familiarity with many other DBMSs.
I also have extensive knowledge and experience developing desktop/web applications and services with the .net framework, including REST and WCF APIs and third-party API integration (Foursquare, Google, Firebase, Twilio, etc.).
Please note that my quoted rate is for 30 days of my full-time dedication to your project, however this is not a compromise the project can be finished in that time. We would need to further discuss the details. I find the bartering of services concept of your project rather interesting, and propose to develop the application as a ASP web service with a responsive front end (so it works on mobiles and desktop the same).
If you think you may be interested in my services, please send me PM. This way I can share my CV with you (for you to check references and experience), and we can further discuss the details of your requirements.
Best regards,
Marco Garcia