Is it essential to be a chartered accountant to get a better job?

Yes. I believe that being a chartered accountant is one of the qualifications that will put an applicant ahead of the other applicants. But this is not a guarantee to get the best job, because one should also have the necessary work experience and skills.

you have to be qualify to do some work either you are certified or not

As I think, to be qualifies is more important than certified.

Yes there are some companies that concentrate on certifications but if the person not qualified he won't continue in his job .