In this WordCamp video — the community informal event where the point is just to share knowledge — you are going to get a glimpse of how WordPress.com is made. The keynote speaker for this video is Scott Beckun. He works in Automattic, but he also is a writer, and he will talk a little bit of the WordPress history and he will walk you through day-to-day operations of how WordPress.com is build, how decisions are made when implementing new features, and the difference between WordPress.com, a WordPress blog and Automattic.
This is a video that can help beginners to start with an open source software, as well as advanced users can take the WordPress team experiences and apply those to their own WordPress work. Plus these experiences can help you being more proactive on making decisions, work better with the team and be more motivated when working with the platform.