.NET Core Upgrade

We have an application that requires a .NET upgrade. If you have .NET skills and experience in verison upgrades along with testing to ensure the upgrade is successful, please appply and share with us your experience by resume attached in the chat. This project will be between 4 and 8 weeks duration
Optional: If you also have skills in Java and ReactJS, this would be a benefit as it could lead to flow on additional work after this .NET work is completed