I'm considering my career path and I'm curious about the saturation of job opportunities for Spring Boot versus the complete MERN stack. I've heard that many large companies, especially multinationals, primarily use Java. Should I focus on becoming proficient in Java full stack development instead of pursuing the MERN stack?
3 Answers
Check the job listings in your area! They really provide the best insight into what companies are looking for right now.
In my area, it seems like nobody is hiring for the MERN stack. All the big companies around here are looking for Java or Spring developers, and I've also noticed Go is becoming popular.
It might help to count how many job openings you see for each stack in your local job market. That will give you a clearer picture of what's in demand.

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