SUMMARY:

• Possess Around 7+ years of total IT experience which includes experience in Big Data technologies and Java technologies.
• Good experience in Designing, Planning, Administering, Installation, Configuring, Troubleshooting, Performance monitoring and Fine - tuning of Cassandra Cluster.
• Experience of doing C* upgrades to Major & latest versions.
• Having working knowledge with multiple DC’s set up.
• Experience in efficiently managing backup and restoring data in live C* Cluster.
• Implemented notification framework for efficiently managing Repairs and also developed in house utility for scheduling Repairs.
• Successfully did migration from default repair to incremental repair.
• Excellent knowledge of migrating from STCS to LCS.
• Superior knowledge on Cassandra architecture with better understanding of read and write processes including SSTable, Mem-table and Commit log.
• Excellent CQL and data modeling knowledge from conceptual to physical data models including modern Chebotko diagrams.
• Integrated Apache Spark into existing Cassandra cluster.
• Experience in installing multi-data center and multi-rack Cassandra cluster.
• Tested the application and the cluster with different consistency levels to check for the writes and reads performance with respective to Consistency Level.
• Excellent knowledge on CQL (CassandraQuery Language), for retrieving the data present in Cassandra clusterby running queries in CQL.
• Involved in designing various stages of migrating data from RDBMS to Cassandra.
• Excellent Understanding of Distributed Systems and Parallel Processing architecture.
• Having Hands on experience in installing, configuring and maintaining Linux.
• Experience on Cassandranode tool to manage Cassandracluster.
• Proficient in managing and monitoring the cluster using Datastax OpsCenter.
• Expertise in Application Development using Java/J2EE.
• Experience in developing complex queries, Stored Procedures, Functions, Views, and Triggers using SQL Server.
• Effective communication and quick decision making in the common interest of the team and can handle stress full situation in an effective manner.
• Good written and oral communication skills and Interpersonal skills with a strong ability to excel through collaboration with team members.

TECHNICAL SKILLS:

Languages: C/C++, Java, J2EE (Servlets, JSP, JDBC, Java Beans), PL/SQL.

NoSQL Databases: Cassandra.

Relational Databases: Oracle11g.

Cassandra: Cassandra, DataStax OpsCenter and DevCenter, node tool, Spark on Cassandra and Open Stack.

Operating Systems: Windows 8/7/XP/Vista, Linux.

Web technologies: XML, XSLT, XAML, HTML, CSS, XMLHTTP, Java script.

Software: Eclipse,MAT,Maven,ANT,GIT,JIRA

PROFESSIONAL EXPERIENCE:

Confidential, St. Petersburg, FL

Cassandra Developer

Responsibilities:

• Administered and Maintained a Multi-Datacenter Cassandra cluster.
• 24x7 Support for Cassandra related issues.
• Trained the team on the concepts of Cassandra and how to build applications on top of it.
• Experience in performance tuning a Cassandra cluster to optimize it for writes and reads.
• Excellent knowledge of deploying & working in multiple DC cluster.
• Involved in the process of data modeling Cassandra Schema.
• Installed and Configured Data Stax Ops Center for Cassandra Cluster maintenance and alerts.
• Benchmarked Cassandra cluster based on the expected traffic for the use case and optimized for low latency.
• Involved in applying patches from community to Cassandra DB in production.
• Involved in automation of moving Snapshots from C* disk to Tape drive
• Tuned and recorded performance ofCassandraclusters by altering the JVM parameters.
• Excellent working of migrating data from RDBMS to C* cluster with the help of SPARK.
• Implemented advanced procedures like text analytics and processing using the in-memory computing capabilities like spark.
• Data modeled the new solution based on Cassandra and on the use case.
• Performance tuning and stress-testing ofNoSQLdatabase environments in order to ensure acceptable database performance in production mode.
• Scheduled repair and cleanup process in production environment.
• Implemented Partitioning, Dynamic Partitions and Buckets in C* for efficient data access.
• Tested the high-availability architecture with enabling/disabling SSL, enabling/disabling Kerberos.
• Management Services directories as NFS mount.

Environment: s: Cassandra 2.1, DevCenter, Cqlsh, OpsCenter, Nodetool, UNIX, Cassandra-stress, Shell Scripting, Github, Maven, Shell Scripts, Spark.

Confidential, Deerfield, IL

Cassandra Developer

Responsibilities:

• Involved in database deployments, capacity planning, monitoring multi datacenters, performance tuning-, and troubleshooting.
• Involved in NoSQL database design, integration and implementation
• Involved in capacity planning and requirements gathering for multi datacenter Cassandra cluster.
• Involved in the process of designing Cassandra Architecture.
• Installed, Configured, Tested Datastax Enterprise Cassandra multi-node cluster which has 4 Datacenters and 5 nodes each.
• Installed and configured Cassandra cluster and CQL on the cluster.
• Involved in the process of data mover for disaster recovery platforms Backup and recovery.
• Knowledge on set up Cassandra wide monitoring scripts and alerting system.
• Knowledge on bootstrapping, removing, replicating the nodes in Cassandra and Solr clusters.
• Experienced in upgrading the existing Cassandra cluster to latest releases.
• Imported data from various resources to the Cassandra cluster using Java APIs.
• Strong understanding of internal processes of NoSQL approach.
• Optimized the Cassandra cluster by making changes in Cassandra properties and Linux(Red Hat) OS configurations.
• Configured Performance Tuning and Monitoring for Cassandra Read and Write processes for fast I/O operations and low latency time.
• Performed Stress and Performance testing to benchmark the cluster
• Administered Cassandra cluster using Datastax OpsCenter and monitored CPU usage, memory usage and health of nodes in the cluster.
• Experienced in storing the analyzed results into the Cassandra cluster.
• Configured accordingly to achieve maximum throughput and execution time based on the benchmarking results.
• Used Github version control for tagging the new versions.
• Involved in the Migration of data from one database to another database.
• Configured, Documented and Demonstrated inter node communication between Cassandra nodes and client using SSL encryption.
• Knowledge on applying updates and maintenance patches for the existing clusters
• Scheduled repair and cleanup process in production environment
• Implemented client to server SSL encryption and Server to Server SSL encryption

Environment: Java, J2EE, Struts, UML, JDBC, JSP, EJB, HTML, Java Beans, XML, Servlets, WSDL, oracle.

Confidential

Sr Java Developer

Responsibilities:

• Client interaction for requirement gathering.
• Created Technical Design Documentation (TDD) based on the Business Specifications.
• Performance optimization and identification of memory leaks in Java code using JProbe Profiler & JProbe Memory Debugger.
• Used XML DOM API for parsing XML.
• Developed Scripts for automation of productions tasks using Perl, UNIX scripts.
• Used ANT for compilation and building JAR, WAR and EAR files
• Core offshore development.
• Cross testing of modules developed by other team members.
• Integration with existing System (AS400).
• Project coordination with other Development teams, System managers and web master and developed good working environment.

Environment: s: Datastax 4.8, Cassandra 2.2, DevCenter, Cqlsh, Apache Hadoop 2.2.0, OpsCenter, Shell Scripting, Maven, Eclipse, Solr, Apache Kafka, Spark.

Confidential

Software Engineer

Responsibilities:

• Involved in System Analysis and Design methodology as well as Object Oriented Design and development using OOA/OOD methodology to capture and model business requirements.
• Proficient in doing Object Oriented Design using Uml Rational Rose.
• Created Technical Design Documentation (TDD) based on the Business Specifications.
• Created JSPpages with Struts Tagsand JSTL.
• Developed UI using HTML, JavaScript, CSS and JSPfor interactive cross browser functionality and complex user interface.
• Implemented the web based application following the MVC II architecture using Struts framework.
• Used XML DOM API for parsing XML.
• Developed Scripts for automation of productions tasks using Perl, UNIX scripts.
• Used ANT for compilation and building JAR, WAR and EAR files.
• Used JUnit for the unit testing of various modules.
• Project coordination with other Development teams, System managers and web master and developed good working environment.

Environment: Java, J2EE, JSP, JavaScript, MVC, Servlet, Struts, PL/SQL, XML, UML, JUnit, ANT, Perl, UNIX.