Why do you apply <strike>for</strike> to this company? (or Why are you applying to this company) [I prefer the second sentence.]
<strike>The first that</strike> I am applying to this company because it is an international company and <strike>it</strike> will <strike>be</strike> help<strike>ful</strike> <strike>to</strike> raise my value. [I don't understand the "raise my value" part; maybe "and will help me gain (valuable) experience."]Why do you apply for this company?(or Why are you apply this company)
Why are you applying to this company? [better]
Why did you apply to this company? [good]