Analysis Skills, Apache Avro, Apache HBase, Apache Hadoop, Apache Lucene, Apache ZooKeeper, Authentication, Bash Scripting, CentOS, Certificate Servers, Cloud Computing, Cloudera, Code Reviews, Commercial Off-the-Shelf (COTS), Computer Networks, Computer Operations, Computer Science, Computer Skills, Concurrency, Concurrent Programming Language Family, Configuration Management, Data Analysis, Debugging Skills, Design Document, Digital Certificates, Distributed Applications, Distributed Computing, Documentation, Eclipse IDE, Ecosystems, Engineering, File Systems, Firewalls, Government Off-the Shelf (GOTS), HDFS (Hadoop Distributed File System), Hardware Design, IBM Rational ClearQuest, IR (Infrared), Industry Standards, Information Retrieval, Information Technology & Information Systems, Information/Data Security (InfoSec), JSON, Java, Java Message Service (JMS), Java Platform Enterprise Edition (Java EE/J2EE), Linux Operating System, MapReduce, Maven, Memory Management, MongoDB, Network Administration/Management, Object Oriented Design (OOD), Object Oriented Programming (OOP), Problem Solving Skills, Public Key Infrastructure (PKI), Python Programming/Scripting Language, REST (Representational State Transfer), Red Hat Linux Operating System, Requirements Management, Ruby, SOLR, Software Design, Software Development, Software Engineering, Software Reuse, Subversion, Test Plan/Schedule, Test Requirements, Testing, Utility Computing, VMWare, Virtualization, Web Services, XML (EXtensible Markup Language)