Speaking fluent English doesn't ensure you finding a good job.

[Silverobama]

I wonder if "speaking fluent English doesn't ensure you finding a good job" is natural.

The context is that many people can speak fluent English in China but this doesn't mean that they can find a good job because there are other requirements like overseas experience (traveling, studying abroad), qualifications, etc.

How would native speakers of English express the idea?

 

[tedmc]

Being able to speak fluent English does not guarantee you a good job.

 

[emsr2d2]

Speaking English fluently doesn't guarantee you a good job.
Speaking fluent English doesn't ensure that you'll get a good job.

(I'd use one of those or a mixture of the two.)

 

[teechar]

I wonder if "speaking fluent English doesn't ensure you finding a good job" is natural.

No. See suggestions above. Also, the underlined part is ungrammatical.