Hi,
If you're new to Open edX development, I think the first day will be especially useful - that's when we'll have the in-depth tutorials and workshops, much of which will be focused on developement as well as devops.
There will be interesting stuff in the main conference, too - for developers, you'll learn about new integrations, product direction, and there will be a developer summit on the last day, all about collaborating on current works in progress.
I'm biased, but I think it's a good event to attend :)
-JM