Java Full Stack or Data engineering, Which one I should prepare for ?

Hi Everyone ,

I am working in Mern Stack based project for 1 year. But I realized, I am not getting enough learning here in the project. I am trying to switch from my current organization but I can see that only startups are hiring for mern stack developer which requires immediate joiner or 1 month notice period. I want to learn something new. So, I want to get some suggestions from you all who are currently working in java full stack or date engineering project. So that I can get a clear insight of both the fields based on the future opportunities and salary obviously and I can decide which one can be best for me.

Please share your opinions. Thanks in advance.