I got tired of wasting 40 hours wiring up React Native & .NET auth, so I built a reusable Enterprise Starter

Hey Indie Hackers,

I’m a software engineer who spends a lot of time building complex mobile apps and B2B platforms. I noticed a frustrating pattern every time I wanted to launch a new SaaS idea: the "infrastructure phase" was killing my momentum.

Before I could even build a single core feature, I was spending my first week doing the exact same boring tasks:

Setting up .NET AuthControllers and BCrypt.

Configuring JWT Bearer tokens.

Wiring up Axios interceptors to handle token refreshes and 401s globally.

Building out custom UI components from scratch.

I finally decided to stop repeating myself and built a complete Enterprise Mobile Solution that handles all of this out of the box.

The biggest technical hurdle I solved: The "Storage Trap"
If you build with Expo, you know that expo-secure-store is great for iOS/Android, but if you try to test your app in a web browser, it crashes completely.

To fix this, I built a smart storage utility inside the architecture that automatically detects the platform. If it's on the web, it uses standard localStorage. If it's on a physical device, it smoothly switches to high-security SecureStore. No more browser crashes during development.

What’s inside the stack:
Backend: .NET Core 9 API, SQLite (Entity Framework Core - easy swap to Postgres), JWT Auth.

Frontend: Expo (React Native), TypeScript, and a premium UI component library (complete with loading states and secure password eye-toggles).

Network: Pre-configured Axios instance with a global auth interceptor.

Why I'm sharing it:
As indie hackers, our time is our most expensive asset. Spending 30 to 40 hours just to get a login screen working securely is a massive waste of energy when you could be validating your actual product.

I’ve packaged this entire architecture into a production-ready starter kit. If you want to skip the boring setup phase and launch your next mobile app this weekend, you can grab the full source code here:

https://saadventure610.gumroad.com/l/EnterpriseMobileSolution-ReactNative-NETCore

I'd love to hear your thoughts on this tech stack! For those of you building mobile apps, what is the most annoying part of the initial setup for you?