pursue a career
I also need to express
I am interested in working for a company because I want to make improvements in my career by promoting from low posts to high ones

IN Spanish " desarrollar una carrera profesional en su empresa.
It is for a cover letter

Thanks

Question

pursue a career
I also need to express 
I am interested in  working  for a company because I want to make improvements in my career by promoting from low posts to high ones

IN Spanish  " desarrollar una carrera profesional en su empresa.
It is for a cover letter

Thanks

Answer

We call this a promotion , going from a lower position to a higher position. Hope you get your promotion.:)