I'm looking for an experienced front-end and back-end developer to create a mobile app for both Android and iOS platforms. The main functionality of the app will be payment processing. Key Requirements: - User authentication via email and password - Payment processing integration for: - Credit/Debit cards - Google Pay/Apple Pay - Razorpay - PayU - UPI Ideal Skills and Experience: - Proficiency in mobile app development for Android and iOS - Strong experience in payment integration and handling user authentication - Familiarity with Razorpay, PayU, and UPI is a plus - Ability to deliver a secure, user-friendly, and efficient payment processing experience