Arie developed the Stack Overflow Mobile App while around the world. He enjoys speaking on career development, mobile design (especially iOS), other cultures and languages, and turning espresso into code.
Dan builds tools to make internal process and procedure efficient and consistent. He worked previously in education as both an educator and technical staff. He has spoken on a variety of topics, including Google Glass, Leap Motion, Technology in Education, Django Web apps – and other past tinkerings.
David Fullerton is the Chief Technology Officer of Stack Overflow, responsible for all software development, design, and site reliability. David joined Stack Overflow in 2010 as a Development Team Lead before assuming a leadership role as Vice President of Engineering in 2012. He has a B.A. in Computer Science from Dartmouth College, and holds strong opinions on working remotely, private offices, and engineering management in general.
David speaks on programming, management, and cognitive biases as they apply to hiring and decision making in the workplace. He specializes in .NET on topics such as performance and optimization, distributed caching, cloud computing, and search algorithms.
Jeff speaks about startups, the management and scaling of both sales teams and software development teams and how the two are much similar than you might think. His talk ‘The Developers Guide to Running a Sales Team’ can be seen [here](http://businessofsoftware.org/2015/02/jeff-szczepanski-developers-guide-running-sales-teams/).