As an online event calendar Eventfinder relies heavily on its technology stack, which is why we put so much energy into making the product as robust as possible. We have dual application servers and database servers in order to provide highly available services to our 250,000 monthly visitors; we have a monitoring program running 24/7 which notifies our engineers immediately when any services suffer an outage; and when it comes to development we use Symfony, a battle tested open source PHP framework which speeds up our intensive daily development work.
Recently we spent around three months in total upgrading Symfony – in other words we spent three months optimising…