In itself, there isn't that much direct value to an employer unless your work in a Masters degree is directly relevant to their product/service.
However, the most valuable part of an advanced degree is building your own knowledge and experiencing new things that you won't necessarily get to experience in a job. You may meet some new friends, you may discover a love for a certain subject and want to position your career towards that field or you might be able to boost your own understanding of the theoretical side of CS to a point where it aids your understanding of programming. That is worth far more than anything an employer can offer you.
However, the most valuable part of an advanced degree is building your own knowledge and experiencing new things that you won't necessarily get to experience in a job. You may meet some new friends, you may discover a love for a certain subject and want to position your career towards that field or you might be able to boost your own understanding of the theoretical side of CS to a point where it aids your understanding of programming. That is worth far more than anything an employer can offer you.