I would like to apply for the position of XX at your company because I'm interested in the services you provide for your customers.
この場合、次のような言い方ができますよ。
ーI would like to apply for the position of XX at your company because I'm interested in the services you provide for your customers.
「御社のサービスに興味がありXX職に応募させていただきました」
to apply for the position of XX で「XX職に応募する」
the services you provide for your customers で「顧客に提供するサービス」
ご参考まで！
カナダ 
