What are the Best Ways to Dive Deeper into Backend Development?

I recommend starting with a small project! It’s easier to understand backend issues when you're actually facing them. Maybe something like a review website or a discussion forum with features for login, posting, and tracking user interactions.

If you're questioning Express, what exactly do you find lacking? It’s quite popular in the MERN stack and has plenty of modules for authentication if you dig into them.

Lastly, a key part of backend development is learning to manage it at scale — like load balancing and handling database transactions carefully. Once you've got a backend running locally, think about deploying it to the Cloud to learn how to maintain it across multiple servers.

If you're considering Java, definitely check out **Spring Boot**. It's robust and focuses on good practices in backend development.

You might want to consider two paths since you're familiar with Express:

1. **NestJS**: This stays within the TypeScript/Node ecosystem and enforces proper architecture with modules and dependency injection, making it feel like Express but with a more opinionated structure. It helps you learn design patterns applicable across different backends.

2. **Django or Laravel**: These are great options from different ecosystems. Both come with lots of built-in features like authentication and middleware, helping you understand how all the components connect rather than just piecing them together.

Personally, I'd suggest **Laravel**. It's well-documented and has free video series on Laracasts that explain not just the how, but the why behind the concepts.

**Free Resources:**
- Laracasts (limited free content, paid versions are worth it)
- NestJS official docs and courses
- Excellent Django official tutorial

**Paid Resources:**
- Boot.dev for a project-based learning path
- Laracasts subscription (around $15/month)

Focus on core concepts like request lifecycles, authentication vs authorization, database transactions, caching strategies, and queue systems. Once you pick a framework, try to build a project with real users — even if it’s just for 10 friends to give you practical experience with sessions, security, and managing edge cases. What kind of project are you interested in?