NestJS vs Spring-Boot

Hi there, I'm deciding the technology to use in my project.

I need to build software that has:

• Login
• Register
• Main View (access to a user account, News, General Info, Business hours, software, and parts section).
• Account Preferences.
• Web Shop for Parts (Support, Download Sections, Ticket System).

The most critical functionality is a WebSocket that connects between a car that sends real-time data through serial communication, and a server performs diagnosis on the car and sends the results back to the user.

Hello, I am a fullstack web developer. I have been working for a company with Java/ Spring Boot and client-side JavaScript(mainly jQuery, some AngularJS) for the past 4 years. As I wish to now work as a freelancer, I am faced with a dilemma: which stack to choose given my current knowledge and the state of the market?

I've heard PHP is very popular in the freelance world. I don't know PHP. However, I'm sure it wouldn't be difficult to learn since it has many similarities with Java (OOP). It seems to me that Laravel has similarities with Spring Boot (it's MVC and OOP). Also, people say Laravel works well with Vue.js, which is my favorite JS framework.

On the other hand, I already know the Javascript language, and I like Vue.js, so I figure I could go the fullstack Javascript route with ExpressJS. However, I am not sure if these techs are ripe for freelancing (with regards to RAD, stability, reliability, security, costs, etc.) Is it true that Express is almost always used with MongoDB? Because my experience is mostly with SQL databases.

The projects I would like to work on are custom web applications/websites for small businesses. I have developed custom ERPs before and found that Java was a good fit, except for it taking a long time to develop. I cannot make a choice, and I am constantly switching between trying PHP and Node.js/Express. Any real-world advice would be welcome! I would love to find a stack that I enjoy while doing meaningful freelance coding.

I'm planning with a small team to create an application which is a platform for restaurants. I'm on the backend almost alone currently. I'm going to use Node.js for that, and I'm very fond of TypeScript, and I worked before mostly with ExpressJS. The team may get bigger as the application becomes bigger and more successful, so I have the Scalability concern in mind now, and I was considering these options:

1. Use Node+Express+Typescript
2. Use Node+NestJs (which utilizes Typescript by default)

Option 2 is enticing to me because recently I came to love NestJS and it provides more scalability for the project and uses Typescript in the best way and uses Express under the hood. Also I come from an Angular 2 background, which I think is the best frontend framework (my opinion, and I know React quite well), which makes Nest feel familiar to me because of the similarity between Nest and Angular. Option 1 on the other hand uses Express which is a minimalist framework, very popular one, but it doesn't provide the same scalability and brings decision fatigue about what to combine with it and may not utilize Typescript in the best way. Yet, on the other hand, it is flexible and it may be easier to manipulate things in different ways with it. Another very important thing is that it would be easier in my view to hire Node developers with skills in Express than NestJs. The majority of Node developers are much more familiar with JavaScript and Express.

What is your advice and why? I would love to hear especially from developers who worked on both Express and Nest