To integrate WebRTC into an existing web application, you must ensure the WebRTC developer has a solid understanding of your technology stack and architecture. The developer should work with your team to identify the areas that need modification and determine the integration points.
Once the integration points have been identified, the developer should create a plan for integrating WebRTC into your web application. They should work with your team to ensure the integration is seamless and there are no issues or bugs. The WebRTC developer should also be able to provide recommendations on optimizing the integration and improving system performance.