Desk.com (a Salesforce.com company) - San Francisco, CA and Remote in US/CA time zones.
We're looking for experienced engineers with top-notch software design and coding skills, ideally with knowledge of AngularJS and Ruby on Rails. Our stack includes Ruby, Javascript, ElasticSearch, RabbitMQ, Redis, and MySQL. All of our infrastructure is hosted on Amazon AWS as well.
For more info, please check out our careers page: 
<a href="http://www.desk.com/careers" >
If you have any specific questions, reply to this thread and I will answer.