Our client is developing a leading medical appointment booking platform used by 40% of U.S. residents in over 2,000 cities, facilitating more than 10 million appointments monthly. The client is launching a new business stream focused on integrating an AI Agent into healthcare providers' daily workflows. This initiative aims to embed a greenfield AI-driven product into the routine operations of practice management teams, enhancing how they interact with core systems such as CRM, EMR, and VoIP platforms. We are looking for a proactive Senior .NET Developer with strong expertise in React and JavaScript - someone primarily passionate about backend development but also comfortable contributing to frontend tasks. The developer will help build new functionality in close collaboration with the frontend platform team, reusing shared libraries and frameworks already established by the client. The client's environment is language-agnostic, with deployment handled through the AWS toolkit and real-time monitoring via DataDog. Effective collaboration requires at least a 3-hour overlap with Eastern Standard Time (EST).