If you go and Google Magento, one of the definitions you will come across is the following: Magento is an ecommerce platform built on open source technology. In other words, if you need a online store, the chances are that you most likely consider Magento as one of the options.
The businesses that choose Magento are usually the ones which need a lot of flexibility on the platform they are releasing and willing to invest certain resources in achieving it.
Do you need to hire and retain a Magento developer? Or several of them to create a team? You worry if they are going to be a good fit for your vision, mission, and values? Let us support you in that task.