I have been working Professional Hadoop Big data developer. I have 5 Years of experience in Big data technology like Java8, Spark SQL, Spark DataSet, Spark DataFrame, Map Reduce, HDFS, HADOOP, HBase,Mongo DB, Oralce, My SQL, Spring Boot, Hibernate in Java 8.
My Key Skill to optimize Spark Application.
1) Buckeing
2) Partitioning
3) Use BroadCast Hash Join
4) Avoid using udf, use lamda
5) Avoid data skewness problem.
6) Experience to handle 50-60 TB of data in daily basis.
Many More.
Please contact.