TikTok-like App Enhancement

I'm seeking an expert app developer to upgrade my current app to mirror TikTok's functionality. The primary focus is on the live streaming features, which should incorporate: - Viewer interaction through comments and likes - A system for virtual gifts and donations - Options for multi-user streaming Additionally, the app must include comprehensive and secure built-in payment options for the virtual gifts and donations. This includes: - Credit/Debit card payments - PayPal transactions - A well-structured in-app currency system Ideal candidates for this project should have extensive experience with app development, particularly in creating live-streaming features. Familiarity with TikTok's interface and functionality will be highly advantageous. Please provide examples of similar projects you've completed in your proposal.