Hadoop,Apache Spark,Kafka,etc.,S3,RDS,EC2,ECS,Lambda,SQS,SNS,DynamoDB,CloudFormation,etc),Terraform,Chef,Docker,Ansible. CI/CD ( Jenkins,Artifactory,Nexus),maven,gradle,grunt,gulp,git,npm,yarn,lein,boot,Xcod,stream-processing systems: Storm,Spark-Streaming,etc. & DevOps engineering