Next.js is probably the most enjoyable React framework our team could have picked. The development is an extremely smooth process, the file structure is beautiful and organized, and the speed is no joke. Our work with Next.js comes out much faster than if it was built on pure React or frameworks alike. We were previously developing all of our projects in Meteor before making the switch. We left Meteor due to the slow compiler and website speed. We deploy all of our Next.js projects on Vercel.

This basically came down to two things: performance on compute-heavy tasks and a need for good tooling. We used to have a Meteor based Node.js application which worked great for RAD and getting a working prototype in a short time, but we felt pains trying to scale it, especially when doing anything involving crunching data, which Node sucks at. We also had bad experience with tooling support for doing large scale refactorings in Javascript compared to the best-in-class tools available for Java (IntelliJ). Given the heavy domain and very involved logic we wanted good tooling support to be able to do great refactorings that are just not possible in Javascript. Java is an old warhorse, but it performs fantastically and we have not regretted going down this route, avoiding "enterprise" smells and going as lightweight as we can, using Jdbi instead of Persistence API, a homegrown Actor Model library for massive concurrency, etc ...

I was researching multiple high performance, concurent//parallel languages for the needs of authentication and authorization server, to be built on microservice architecture and Linux OS. Node.js with its asynchronous behavior and event loop suits the case best. Python Django & Flash turns to be slower and .NET Core & Framework wasn't the best choice for the Linux environment at the time (summer 2018).

I also tested Go lang and Rust, although they didn't meet the quick prototyping criteria as both languages are young and lacking libraries or battle-tested ORM.

There has been a lot of buzz around having PostgreSQL for ASP.NET Core 3.1 web apps. But Configuring Identity Server 4 with PostgreSQL is a real challenge. I've made a simple video to configure the ASP.NET Core 3.1 based Web application that uses AngualrJS as front end with Single Page App capabilities with Identity Server 4 talking to the PostgreSQL database. Check out this Video tutorial on how to do that in detail http://bit.ly/2EkotL5 You can access the entire code here on github http://bit.ly/35okpFj