I'm seeking an experienced mobile app developer to create a secure, encrypted vault application for both iOS and Android platforms. The app needs to be built with advanced encryption standards (AES-256) to ensure the highest level of security for user documents. Key features include: - Encrypted vault for document storage - Will generation module - Nominee management: - Add/Edit/Remove nominees - Set nominee permissions - Notification to nominees upon changes - Death-triggered access release system Ideal candidates should have: - Proven experience in developing secure mobile applications - Expertise in implementing advanced encryption protocols - Familiarity with iOS and Android development - Strong understanding of user permission systems and notification mechanisms Please provide examples of similar work done.