I love it when the big companies share some insight into how they solve a problem.

Australians
http://techblog.realestate.com.au/

Big Global Players
https://engineering.twitter.com/
http://developers.instagram.com/
http://instagram-engineering.tumblr.com/
https://engineering.pinterest.com/
http://nerds.airbnb.com/
https://blog.asana.com/
https://eng.uber.com/