When the company has a long complex job title, that is usually because they have many different job positions and need to distinguish them from each other. If the job title is "Intermediate Hardware Quality Assurance Specialist - Medical Devices" that probably means there are Hardware Quality Assurance Specialists in other departments, and other kinds of Quality Assurance Specialists in that department. You need to make sure you get added to the pile for the right one. Job applications are often processed centrally by HR departments, whose workers may not be able to tell from your resume that you are obviously applying to the Medical Devices department.
Specifying the exact job title does two things: firstly it precisely identifies the position you are applying for, reducing the possibility of a mistake, and secondly demonstrates that you have read the company's job adverts and have a real opening in mind. Both of those are far more important than elegant sentences.
The lack of readability is not something you should worry about, compared with that. If simplicity and clarity were important to the company, they would not have job titles that long.
If you really want to be concerned about readability, make the job title the subject line:
Intermediate Hardware Quality Assurance Specialist - Medical Devices
I am writing to apply for the above position...