I have read your project description carefully and understand that you are looking for an experienced developer to help you in building a desktop app and android app with mentioned functionalities.
Relevant Skills and Experience
I am proficient in C#, ASP.NET Core, SQL, and other related technologies and HTML, CSS, JS, JQuery, Angular, Bootstrap for front end. In addition, I am Microsoft Certified Professional.
Proposed Milestones
€555 EUR - Placeholder
Have you already selected an SDK for the VoIP part of the Windows application?