No one knows the answer, what you can do is check the linkedin jobs or any other career site to see for yourself how many jobs are available and would you be satisfied with the salary.

Frontend Engineer

Is Flutter developer a good career in the long term? I have 6 years of experience as an FE developer. Skill PHP, JS , Basic React. I have worked in the initial 2 years as Automation QA and then swi...

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Is Flutter developer a good career in the long term? I have 6 years of experience as an FE developer. Skill- PHP, JS , Basic React. I have worked in the initial 2 years as Automation QA and then switched to FE dev. 
Please let me know your thoughts. Thanks

Flutter Developer as a career