I'm Viet Anh, a multi-skilled engineer with extensive experience in creating and managing various types of applications. While my primary focus has been on Serverless architecture and Microservices, I have also ventured into Mobile App Development, including iOS development utilizing Swift. This would be particularly beneficial for your project as you need assistance in converting your game data saving and loading mechanism from PlayerPrefs to Json for the Nintendo Switch.
Having worked on projects utilizing Java, Python, Php, Golang, and other languages leveraging relevant frameworks for backend development alongside proficiency in Native android&ios in Java/Kotlin/Swift/SwiftUI, C++, C#, Rust, Golang for Blockchain engine development with consensus algorithms like POW, POS, POA added to my experiences; I strongly believe I possess the skill set you require.
Not only am I familiar with PlayerPrefs and Json but also I've been working awesomely with Unity. With that being said, rest assured that your task will not only be completed swiftly but also effectively ensuring a seamless game data saving and loading on Nintendo Switch. In addition to my technical skills, my versatility in managing Cloud-native applications across multiple platforms such as Ethereum, BSC, Solana; just to mention a few varieties would add great value to this project. Together let's bring success between this new venture!