Hello,
I am interested in your project. I have been registered with Freelancer for several years and have not started the process of gaining experience in work commissions from the platform.
However, I am a senior programmer with more than 15 years of experience in developing desktop, web applications and more recently mobile and web SPA web applications with JS frameworks.
I could finish your request in less than 24 hours, however, until I know the web service, which seems simple, I reserve to fulfill it in 2 days.
I guarantee excellent results. Multiplatform console application: Windows and Linux (using mono)