I need an experienced Kotlin developer to build an app that records videos while minimizing the camera app in the background. The recorded videos should be saved to device storage and uploaded to AWS S3. Requirements: - Record videos at 720p resolution - Minimize camera app during recording - Save videos to device storage - Upload videos to AWS S3 Ideal Skills and Experience: - Proficiency in Kotlin - Experience with video recording and processing - Familiarity with AWS S3 integration - Mobile app development experience, particularly for Android Please provide relevant work samples and estimates.