Plenty, large scale applications I usually break up into separate applications, each application connected to RabbitMQ which allows me to scale certain parts of the application if needed instead of the whole thing.

Technology stack, see my post

At Mara Group, I was responsible for building a lot of micro services. I use Laravel, Beanstalkd, Redis, MySQL, PHPUnit and PHPStorm. I learnt more on security, I had to build layers and layers of middleware to prevent people from trying to take down the service.

Finally, I had more experience managing servers, using haproxy and scaling beanstalkd. The best part about building a micro service for me is the Separation on Concerns it gives your application.