SUMMARY

• 8 years of experience as software developer in design, development, deploying and supporting large scale distributed systems.
• Having3+ years of experience as Cassandra Developer.
• Datastax certified Apache Cassandra Developer.
• Experience wif installing, configuring and monitoring Apache Cassandra cluster.
• Excellent understanding of Cassandra read and write paths, query and internal architecture.
• Knowledge on implementing multi - datacenter and multi-rack Cassandracluster.
• Excellent Knowledge of CassandraArchitecture,Cassandradata modelling & MonitoringCassandrausing Opscenter.
• Can handle commissioning and decommissioning nodes along wif monitoring ofCassandra Cluster.
• Experience in efficiently managing backup and restoring data in live Cassandra Cluster.
• Experience in working wif Hadoop distributions likeMapR, Cloudera and Hortonworks Distribution.
• Excellentunderstanding of NoSQL Data Modelling Techniques.
• Experience inperformance tuningandmaintenanceof Cassandra Database.
• Strong noledge onbackup and recovery ofCassandrasystems.
• Good noledge on Spark SQL, Spark Streaming and Scala.
• Developed Spark scripts by using Scala IDE as per the business requirements.
• Experience in migrating data using Sqoop from RDMS into Cassandra cluster.
• Experience integration of Kafka wif Storm and Spark for real time data processing.
• Experience in using NiFi and Streamsets to automate the data movement between different stages.
• Strong experience in core Java, J2EE, SQL and Restful web services.
• Experienced wif JIRA for bug tracking and issue tracking.
• Extensive experience in developing applications using Core Java and multi-threading.
• Excellent Team player wif very good analytical, interpersonal and communication skills
• Experience in Agile Methodologies SCRUM in different project life cycles.

TECHNICAL SKILLS

Operating systems: MAC OS X, Linux, Windows, Ubuntu

Languages: C, C++, Java, JavaScript, Scala and Python

Relational Databases: Oracle 10g/11g, MySQL, SQL server

NoSQL Databases: HBase, Cassandra, Mongo DB

Hadoop Ecosystem: HDFS, MapReduce, Spark, Hive, Pig.

IDE tools: Eclipse, IntelliJ, Net beans, STS, Visual Studio, Scala IDE

Big Data: Hadoop, Spark

PROFESSIONAL EXPERIENCE

Confidential, Bethesda, MD

Cassandra Developer

Responsibilities:

• Implemented and Maintained aMulti-DatacenterCassandra cluster.
• Involved in the process of Cassandra data modeling for efficientquerying.
• Involved in requirements gathering and capacity planning for multi data center Apache Cassandra cluster.
• Installed and Configured DataStax OpsCenter for Cassandra Cluster maintenance.
• Created Keyspace and columnfamilies from the data model using DataStax DevCenter.
• Determining and setting up the required replication factors for keyspaces in prod, dev etc. environments in consultations wif application teams.
• Imported data from various resources to the Cassandra cluster using Java API.
• Worked on tuning Bloom filters and configured compaction strategy based on the use case.
• Worked wif CQL for retrieving the data present in Cassandra cluster by running queries in CQL.
• Tested the application and the cluster wif different consistency levels to check for the writes and reads performance wif respective to consistency Level.
• Implementing and maintaining database security(create and maintain users, roles and assign privileges).
• Experience in working wif CCM (Cassandra Cluster Manager) and Cassandra nodetool.
• Administration and maintenance of the cluster usingOpsCenter, Devcenter, Linux, Node tool, CCMetc.
• Committed codes into GIT.
• Interact wif SCRUM team developers, programmers, tester, product owners and stake holders to deliver right value of the project at the end of each sprint.

Environment: Cassandra, OpsCenter, DevCenter, CQL, NodeTool, UNIX, Shell-Scripting, Spark, GIT, JIRA

Confidential, Springfield, MO

Hadoop/ Cassandra Developer

Responsibilities:

• Involved in the process of Cassandra data modelling and building data structures for efficient querying.
• Created Keyspace and columnfamilies from the data model using DataStax DevCenter.
• Performed bulk data loading into Cassandra usingSSTableLoader.
• Managing Cassandra clusters usingDatastax Opscenter.
• Installed and Configured DataStax OpsCenter for Cassandra Cluster maintenance and alerts.
• Involved in bootstrapping, removing, replacing, decommissioning the nodes.
• Troubleshoot read/write latency and timeout issues in Cassandra.
• Involved in Load Testing and Analyzing Bottlenecks using Cassandra-stress tool.
• DevelopedSpark Streamingapplications for Real Time Processing.
• Scheduled repair and cleanup process in production environment.
• Extracted Data from RDMS into Cassandra Cluster using Sqoop.
• Work closely wif the business and analytics team in gathering the system requirements.
• Configured compaction strategy based on the use case.
• Used DataStax Spark-Cassandra connector to load data into Cassandra and used CQL to analyze data from Cassandra tables for quick searching, sorting and grouping.
• Performed Stress and Performance testing to benchmark the cluster
• Backup and recovery using snapshot backups.
• Used Oozie to manage Pig and Hive Jobs.

Environment: /Technologies: Cassandra, Datastax 4.0, HDFS, MapReduce, Hive, Pig, Oozie, Sqoop, Git, Maven

Confidential, San Antonio, TX

Spark/Hadoop Developer

Responsibilities:

• ConfiguredSpark streamingto get ongoing information from the Kafka and store the stream information to HDFS.
• Used various sparkTransformationsandActionsfor cleansing the input data.
• ImplementedSparkusing Scala and Spark SQL for faster testing and processing of data.
• Involved in convertingHive/SQL queries into Spark transformations using Spark RDD's.
• Managing and scheduling Jobs on aHadoopcluster usingOozie.
• Load and transform large sets of structured and semi-structured data.
• Implement Flume, Spark and Spark Stream framework for real time data processing.
• UsingSpark-cassandraconnector to load data to and from Cassandra.
• Responsible in Implementing advanced procedures liketext analyticsand processing using the in-memory computing capabilities likeSpark.
• Experience in extracting appropriate features from data sets in order to handlebad, null, partial recordsusingSpark SQL.
• Optimizing of existing algorithms in Hadoop using Spark Context, Spark-SQL, Data Frames and Pair RDDs.
• Experienced in handling large datasets using Partitions, Spark in memory capabilities, broadcasts in spark, effective & efficient joins, transformations and other during in ingestion process itself.
• Experience in building Real-timeData PipelineswifKafkaConnect and Spark Streaming.
• Loaded large sets of structured, semi-structured and unstructured data wif Sqoop and Flume.
• Developed Spark programs in Scala to perform data transformation, data streaming and analysis.
• Experienced in working wif spark eco system using Spark SQL and Scala queries on different formats like Text file, CSV file.
• Create and share weekly / daily status report wif the team.

Environment: /Technologies: Spark, Spark-streaming, Spark SQL, Kafka, Oozie, Sqoop, Flume, Scala, MapReduce, Hive, Pig

Confidential, San Francisco, CA

Java/Scala Developer

Responsibilities:

• Responsible forBuilding, develop, testingshared components dat will be used across modules.
• Created user stories and resolved development issues.
• Develop Web tier usingSpring MVCFramework.
• Implementeddesign patternsin Scala for the application.
• Unit testing Integration testing and bug fixing.
• Used Akka as a framework to create reactive, distributed, parallel and resilient concurrent applications in Scala.
• Developed Spark scripts by using Scala shell commands as per the requirement.
• Implementing advanced procedures like text analytics and processing using the in-memory computing capabilities like Apache Apache Spark written inScala.
• Migrating data from Apache Spark-RDD into HDFS and NoSQL like Cassandra/Hbase.
• Serialize and de-serialize objects usingPlayJson lib.
• Writing complex Sql queries.
• Use Apache Sqoop to dump the user data into the HDFS on a weekly basis.
• Actively involved in code review and bug fixing for improving the performance.
• Created production jobs using Oozie work flows dat integrated different actions like Map Reduce, Sqoop, Hive.

Environment: /Technologies: Spark, Java, Scala, Hadoop, Cassandra, HBase, Hive, Pig, Sqoop, MySQL, Github.

Confidential

Java developer

Responsibilities:

• Designed and Created Domain model and schema using object oriented design / UML diagrams BuiltSOAP Webservices.
• Design and developed configuration output in XML and PDF format.
• Responsible for design and development of Web Application using Struts MVC Framework.
• Developed the XML schema and Web Services for the data maintenance and structures.
• Performed data mapping from one XML schema to other web services.
• Used SOAP and Web Servicesfor the communication between the different internal applications.
• Experience in developing and deployingWeb ServicesusingSOAP, Rest full web services and shell scripting.
• Implemented CVS as the version control tool.
• Used Firebug for application webpage troubleshooting and Eclipse debugger for the bug fixes.
• Created various unit test cases and integration tests for the DAO, Service, and Controller components using JUnit, DbUnit and Spring Test support.
• Experience in developing JDBC to interact wif the database.
• Implemented logging using Log4j. Responsible for the co-ordination wif the team members and attending meetings.
• Used web servers like Apache Tomcat.
• Involved in the analysis, design and development and testing phases of Software Development Life Cycle.
• Created User Interface screens usingHTML, DHTML, AJAX, CSS, Java script.

Environment: /Technologies: UNIX, Java, JSP, Servlets, Oracle, Apache Tomcat, Maven, XML, spring MV

Confidential

Java developer

Responsibilities:

• Developed variousjavabusiness classes for handling different functions.
• Used SVN version control system to manage system development, and design.
• Used DB2 as the database and wrote SQL & PL-SQL.
• Developed schemas for XML.
• Implemented J2EE standards, MVC architecture using Spring Framework.
• Designed front end wif JavaScript framework in AngularJS and JQuery.
• Developed UI using HTML, JavaScript, and JSP, and developed Business Logic and Interfacing components using Business Objects, XML, and JDBC.
• Designed cascading style sheets and XSLT and XML part of Order entry Module & Product Search Module and did client side validations wif javascript.
• Managed connectivity using JDBC for querying/inserting & data management including triggers and stored procedures.
• Bug fixes for the issues observed in the stage environment.
• Written test cases to test the entire application manually and automated the testing usingJAVA program.
• Used case design using UML modeling include development of Class diagrams, Sequence diagrams, and Use Case Transaction diagrams.

Environment: /Technologies: Struts, Spring, HTML, CSS, Java, J2EE, JSP, XML, Eclipse, WebLogic, JavaScript, MySQL