I'm seeking a skilled web app developer to create a comprehensive social networking platform. The app should serve as a marketplace and an open-world business space, integrating various marketplace functionalities in one accessible location. Key features to include: - User profiles - Messaging system - News feed Ideal Skills and Experience: - Expertise in developing scalable web applications - Experience in social networking and marketplace integrations - Strong background in cloud infrastructure management - Proficient in UX/UI design for optimal user engagement - Familiarity with security protocols to protect user data Please provide examples of similar projects completed and your approach to ensure scalability and security.