Which tech stack do I use?

List of main tech in use

Preferred front-end stack

• Layout HTML5
• Framework React + Flux pattern or Redux + Redux Saga or Redux Thunk
• Styles SCSS + Bootstrap or Bulma
• Language TypeScript or JavaScript / ES6
• The work environment in the browser or server-side Node.js
• Connect to back-end primarily via REST

I follow currently the best standards in the industry and always open to learning new.
You might prefer older Angular or simpler Vue, they both do a similar job to React.

Main tech in use

Strong back-end stack

• Server Nginx or Apache
• Environment Node.js
• Language TypeScript or JavaScript
• Connect to Front-End primarily via REST API
• DataBase MySQL or MongoDB (others like MariaDB or PostgreSQL are welcomed)

I can use PHP and Laravel/Symfony/CodeIgniter frameworks as back-end, but keep in mind that PHP is an older less flexible language that may slow down the development process (I've done a lot of work with PHP mostly in older projects).

Good idea to use Python with Django framework as back-end (if you don't want to rely on Node.js), to my knowledge startups are using that tech stack pretty successfully.