From November 1-4, 2017 in Cancun, Mexico the Ethereum Foundation will be holding the Ethereum Devcon3 conference.
Based on this text on the website it should be a good one… “As a developers conference, Devcon3 programming is designed to help inform, educate, update and address interests of the Ethereum R&D community, including those who are in learning about the technology to become developers or wish to know more about Ethereum development and projects supported by the Foundation as well Ethereum innovation and development being undertaken in the greater ecosystem. While the program is technical by nature, all who wish to attend are welcome!”