Zend Framework 2 is one of the most used Frameworks out there standing next to Symfony 2/3. For example the Magento Shop Engine is based on Zend Framework 1 as well.

This said Zend Framework 2 is a good choice for web applications in general and there are lot's of developers out there. Zend.com even offers certifications as Zend Framework 2 Certified Architect - so you can use their Yellowpages to find capable developers.

Anyways I would not recommend to start creating an ecommerce site from scratch since the existing engines provide so much more than a nice frontend for customers and payment gateway integrations. There are many existing engines you can customize - what most shops do.