Full-Stack Developer Needed to update version of Healthcare Web App

We are seeking a highly skilled Full-Stack Developer to upgrade and enhance an existing healthcare web application. This is not a project from scratch, as the application is already built and fully functional. The primary goal is to transition the app to a newer version, resolve any compatibility issues, update dependencies, and implement improvements to its current functionality.

The selected freelancer will be responsible for:
- Reviewing the existing codebase to understand its architecture and components.
- Updating core components and frameworks to the specified newer version.
- Identifying and resolving compatibility issues that arise during the upgrade process.
- Updating all necessary dependencies to ensure optimal performance and security.
- Implementing requested improvements to the application's existing features.
- Conducting thorough testing to ensure all functionalities work smoothly and as expected post-upgrade.

Experience working with existing full-stack applications and managing complex upgrades is essential. Familiarity with healthcare systems, secure patient data handling, and compliance standards (e.g., HIPAA) is a significant advantage. We are looking for a developer who can ensure a seamless transition and robust performance for our critical healthcare platform.