Video editing for language subtitles

I am in need of a video editor who can add Spanish subtitles to a 10-30 minute video in MP4 format. The ideal candidate should have proficiency in both the Spanish language and video editing. The project requires that you accurately translate English audio to Spanish subtitles and sync them to the video. The finished product should have high-quality subtitles that are easy to read and understand. Please provide examples of previous work in video editing and subtitle creation.