Must have: Core Java, Spark, Scala, AWS (EMR)Nice to have: Python, S3 EC2, EKS, Hadoop, Impala, Hive, Airflow Domain knowledge a plusData set size is 500m-1b rows per batchInterviews - 2 rounds focused on technical - Scala, Spark, write code, answer design questionsExpert in in Full Stack design technique as well as experience working across large environments with multiple operating systems/infrastructure for large-scale programs e.g. Expert Engineers starting to be firm-wide resources working