As an experienced Microsoft developer with a flair for all things Shopify, I can promise you a seamless and secure shopping app that'll make integration between your Shopify platform and fulfillment service nearly effortless. In addition to building robust and simple-to-use apps like yours, I've managed data for a whole host of eCommerce sites including handling installation, testing & validation. I understand the importance of storing data securely which is why I am proficient in MSSQL.
With my WooCommerce experience, I've also developed a penchant for designing efficient and user-friendly interfaces. In short, my technical stack combined with my understanding of ever-evolving Shopify guidelines and policies makes me an ideal candidate for this project. As a bonus?I can help you with your need to store the connection info using MSSQL, thereby making it easier for you to access and secure it.
Let's also not forget about partnership accounts - since you want to host the app on your own Windows Servers - The Shopify App Store can be endearing but I assure you that I have vast experience working within it - from design to coding and installing - that'll ensure the process goes smoothly. So let me bring my in-depth skill set in .NET, C#, and Shopify Development along with my creative problem-solving abilities to create a highly functional, authenticated, secured (OAuth-driven) app that integrates perfectly with Shopify across all devices and looks incredible while doing so."