--E-commerce, Payment Security, Point of sale (POS) system development --JavaEE, JVM, Performance Geek, Angular2,React.js Oracle RDBMS, Core Java, Microservices,REST webservices, Serverless architectures. -Excellent knowledge in OOPS (Object Oriented Programming Structure). -Good knowledge in Cassandra, Kafka, Spark, Elastic Search. -Good knowledge in Core Java, Threads,Exception, Collection framework. -Good knowledge in programming JDBC, Servlets, JSP.