1. 5+ years experience with Solr/Elastic Search
2. Experience in implementing Solr builds of indexes, shards, and refined searches across semi-structured data
3. Understanding of Redis, Cassandra, Nginx+Lua is a must. Familiarity with tools like Salt or Puppet is welcome.
3. Architectural scaling for Solr/Lucene capabilities/Solr Cloud
4. Understanding of basic Machine Learning concepts.