I am a .Net Developer with 4+ years of experience in developing windows desktop applications, powershell and .Net web services. During my time at Microsoft, i had multiple opportunities to work on large scale projects for windows based software, including tasks ranging from design, architecture, development, to testing, triage and bug fixing.
To address your requirement, we would first need to research the available APIs for the listed e commerce platforms. Then, we would structure the input data in a format accepted by those APIs, and invoke them to post the product on those platforms. We would also perform thorough testing and also a user acceptance testing, to ensure complete satisfaction.
I would like the opportunity to help you with your requirements. Please feel free to contact me to discuss the issue any further. Thank you for your consideration.