Tons of hard interesting engineering problems here - they are working on Mesos infra (on AWS), Spark cluster. The web teams use node.js. Most of the backend stuff is in Java/Scala - play framework/node/Clojure. They have some legacy code in C# but they are moving away from it (no one is really "porting" the code), teams are building new products which is replacing old products over time.
Cons
None for now, enjoy working here. Scale is not as massive compared to other consumer web companies in social media or web in terms of user data or activity. But its still fun to work here.
OpenTable Response
10y
Thanks for your feedback! We are happy to hear that you are enjoying the engineering work!
