Hello,
I've never played with Amazon Lambda specifically, however I worked within one of the AWS service team for 2 years by now. I'd like to experiment together on AWS Lambda and see how it works.
We share the screen via Skype and work on code end-to-end. Your project's title says "java" however I see PHP in tags. I have no experience with PHP, so I'd prefer to play with lambda via Java/.NET if you're okay with it.
Let me know if you're interested.
Have a great day,
-- Igor