Groupon

Palo Alto:

- Ruby on Rails developers: http://www.groupon.com/jobs?jvi=oYNBVfw1,job

- Back end engineers: http://www.groupon.com/jobs?jvi=oPZFVfw8,job

- Email infrastructure engineers: http://www.groupon.com/jobs?jvi=o5xIVfwZ,job

- Big data infrastructure: http://www.groupon.com/jobs?jvi=oinzVfwT,job

- Android engineer: http://www.groupon.com/jobs?jvi=owxLVfwt,job

- iOS engineer: http://www.groupon.com/jobs?jvi=oqzLVfwp,job

- Test engineer (performance): http://www.groupon.com/jobs?jvi=oHiwVfwa,job

Chicago, IL

- Ruby on Rails developers: http://www.groupon.com/jobs?jvi=oxggVfwI,job

- Back end engineers: http://www.groupon.com/jobs?jvi=oQZFVfw9,job

And many, many more: http://www.groupon.com/techjobs