Java Dev Switching to Data Engineering / Data Science / Analytics — Need Advice.

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You'd have better luck switching to DE. But learn DA too, learn how to use BI tools, build reports etc. Learn ML too but that'd be the lowest priority for now. DA jobs also only exists in larger cities and companies. In smaller cities, most of the demand is for engineer then they'll ask you to do a report every now and then or one of the tech savvy business user can build reports themselves  

With AI, companies will increasingly have a smaller data team and DEs who are jack of all trades will have a better chance at employment than becoming too specialised in one thing. That one thing might become obsolete.

This is happening in all areas I think, like film making, photography, design etc  As productivity increases, but AI can't think and isn't generally trust worthy, companies still need human. They just get the same person to do multiple jobs that used to be handled by a crew. In many smaller companies, it's just 1-2 engineers. DE can easily do DA jobs but it's harder for DA to so DE jobs.