Hello,
Is your project a Python script that will convert a CSV row into a JSON object or is there more to it? You say that you need a small app to consume an Excel sheet into JSON, but then link to an article about setting up a machine learning service.
If you just need a program to turn an Excel sheet into JSON, then you can have it tomorrow for $50. Otherwise, please describe you needs in more detail.
Contracting me means access to over two years of data analysis experience, converting data between formats for posterior consumption by machine learning algorithms. If that sounds like the profile you are looking for, please do not hesitate to reach out.
Thank you for reading my proposal!
-Dustin