Firebase. I've just tried it a few times yet (in combination with React) so I'm not an expert with deep knowledge in Firebase but seems like a good choice.

Hi .. I'm Thomas Weibenfalk, a developer and designer from Sweden. I've just finished my FIRST EVER online video course. I will show how you build an IMDB style web application in React.js The movie data is fetched from The Movie Database. I, myself, find a passion in web application development recently so that's why I love using React. It's on Udemy and if you use the code FIRST-EVER you can enroll it for free if you're among the 20 first who enroll. Visit the course here: https://www.udemy.com/learn-react-the-fun-way/ Have fun! =) Thomas