Title: Data Engineer Location: Fairfax, VA *Clearance: *Active TS/SCI w/ Polygraph needed to apply * Company Overview: Cornerstone Defense, in partnership with our military, intelligence, and civil government customers, supports U.S. operations worldwide through the use of many different types of intelligence, satellite, and cyber technologies. Cornerstone's Intelligence Sector provides solutions to the United States Government for information collection, operations, exploitation and dissemination, and research activities. Our Team specializes in software development, cloud architecture, systems and network engineering, systems integration, agile management, as well as targeting operations and intelligence analysis. Our support to our mission customers includes cyber network operations, exploitation and defense, signals intelligence, human intelligence, and critical missions and networks. Responsibilities Seeking a Data Engineer who wants to take their career to the next level. This position requires an active TS/SCI with polygraph and will be located on customer site in Northern VA. WHAT YOU'LL DO: * Design, develop, test, and maintain production-level enterprise applications deployed to cloud infrastructure * Extend open-source libraries and systems as necessary to meet the needs of the team * Design and implement functionality that spans from storage to middleware to browser * Create interactive Web-based user interface components and data visualizations * Work closely with customers and teammates to rapidly build, test, and deploy new capabilities TASKS YOU MIGHT WORK ON: * Designing new ETL pipelines for diverse sets of data using Apache Nifi for both batch and streaming data. * Maintaining our existing Nifi infrastructure that processes upwards of 50GB a day. * Building data analytics infrastructure using Apache Spark and Airflow. * Architecting new data solutions as our application is tasked with processing an expanding array of data sources. * Leading the further development and maintenance of our existing Elasticsearch cluster. * Rearchitecting our current analytics platform built on Scala and Akka into serverless tools like AWS Lambda. * Help monitor and maintain our infrastructure deployed to Amazon Web Services using Kibana and Elastic stack Qualifications * You love technology (e.g., Angular.io, Node.js, Elastic Stack, AWS, MongoDB, Apache NiFi, Ansible, Scala, Akka, Spring.io, and more) * You have a degree in computer science or a related field, or at least 4 years of experience in lieu of a degree, and like trying new things. * You want to work in a lively yet laid-back environment full of people who love learning * You want to build stuff people actually use * You must have an active TS/SCI clearance with polygraph