Hands-on experience in time and sales analysis and forecasting, data warehousing systems, CRM, cross-sale, up-sale, and client retention. Solid knowledge of the theory of probability, mathematical statistics, algorithms, machine learning, and deep learning. Core technology stack encompasses Python, R, MATLAB, Java, Elasticsearch, Logstash, Kibana, Hadoop Ecosystem, HDFS, HBase, Kafka, Flume, Solr, Hive, Spark.