Wave Technology Based VoIP & PBX Solution

I am seeking a proficient developer or team with experience in VoIP and PBX solutions, specifically ones that leverage wave technology. Below is features list: Crafting a user-friendly interface for an IP Phone system Making a simple IP Phone interface Building an easy IP Phone interface Designing a sleek IP Phone interface Ensuring high-quality standards for audio and video communications Keeping high-quality audio and video Delivering reliable audio and video Achieving smooth audio and video Incorporating essential features such as instant messaging and file sharing Adding instant messaging and file sharing Integrating instant messaging and file sharing Implementing instant messaging and file sharing Please only bid if you have something ready solution which you can show as demo which you can modify based on our need. We have multiple projects so looking for long term basis wave/voip developer who is having ready solution. Thank you!