* Experience building web applications and JSON-based REST APIs with Node.js (Express, Restify, etc.)
* Experience with a variety of database platforms (MongoDB, MySQL, etc.)
* Familiarity with search platforms (Lucene, Solr, ElasticSearch, etc.)
* Familiarity with caching systems (Memcached, Redis, AppFabric, etc.)
* Experience with HTML/CSS/JavaScript and a variety of frameworks and libraries (jQuery, React, Bootstrap, LESS, etc.)
* Experience with cloud computing environments (Amazon Web Services, Windows Azure, Rackspace, Digital Ocean, etc.)
* Deep expertise in internet protocols (HTTP, SMTP, SSH, TCP, UDP, etc.)
* Knowledge of security best practices
* Experience with DVCS (Git, Mercurial) and continuous integration systems
* Experience with APM solutions is a plus (Boundary, Pingdom, NewRelic, Splunk Storm, etc.)
* Experience with analytics platforms is a plus (Google Analytics, Mixpanel, Graphite, Statsd, etc.)
You should love gathering and graphing metrics, analyzing data to spot areas to make performance optimizations, and just generally be a data junkie.