E-mail : dgadiraju@gmail.com

 

Durga Viswanatha Raju Gadiraju

IT Manager/Consultant

 

Summary:                                                                                                                Phone: 714 267 7985

 

·       Passionate about Information Technology and actively seeking for technical manager/management consultant position in a progressive organization.

·       10+ years of programming and architecture experience using vast array of technologies and frameworks in various domains and in following roles.

 

•Sr. Database Consultant/Solutions Architect/Enterprise Architect/Technical Manager

•Sr. Software Engineer/Database Lead
 

·       Masters in Computer Applications (MCA) from Nagarjuna University, India

·       Oracle Certified Associate– PL/SQL Developer, DBA, Goldengate

·       Experience in building and managing small and medium sized talent pools up to 20

·       Proficient in Oracle Exadata– Smart Scans, ESFC, DBRM, IORM

·       Proficient in Big data ecosystem – Hadoop HDFS, HBase, MapReduce, Pig, Hive, NoSQL, MongoDB

·       Knowledge about Oracle Fusion Middleware Architecture – ODI, Goldengate, OBIEE, Web Center, SOA Suite etc

·       Extensive experience in Oracle Enterprise Manager to monitor Oracle Databases

·       Certified Training of Data Warehousing tools like ODI,Informatica, Cognos and Golden Gate

·       Expert in SQL, PL/SQL, Java/J2EE, Oracle Architecture and Performance tuning

·       Mentor in SQL, PLSQL and Performance Tuning as well as Goldengate

·       Data Integration with Oracle Directory LDAP Server and Oracle Coherence in memory data grid.

·       Experienced with Java/J2EE containers – Oracle Weblogic, IBM Websphere

·       Erudite in Data modeling in both OLTP and OLAP environments

·       Erudite in Data Warehouse concepts and architecture

·       Strong knowledge and experienced in Perl/Unix shell scripting

·       Knowledgeable in Unix and storage architectures

·       Involved in design and development of database driven systems ranging from 500 GB to 100+ TB of data

·       Good knowledge of project management and involved in preparing project plans – primarily worked on WBS and critical paths

·       Good understanding of Agile programming, RUP and PoweRUP process frameworks

·       Experienced in several databases like MySQL, Informix, Sybase Engine (similar to MS SQL Server TSQL)

 

Technical Skills:

 

Operating System                                           IBM AIX, Sun Solaris, HP-UX, Linux, Windows NT/2000

Languages                                                          C, C++, Java, PLSQL, Pig, Hive

Databases                                                        Oracle, SQL Server, Informix, Sybase, MySQL, HBase, MongoDB

Fusion Middleware                                          IdAM, SOA Suite, Web Center, OBIEE etc

ETL Tools                                                        Goldengate, Oracle Data Integrator, Informatica

BI Tools                                                        Cognos, Crystal Reports, OBIEE

Java/J2EE/Web Technologies              Java , Java Beans, JDBC, Servlets, JSP, RMI, EJB1.1/2.0, XML, XSL,

Web/Application Servers              Tomcat, BEA Weblogic, Web Sphere

 

Major Assignments:

 

Employer              : Vayu Inc

Client(s)              : Citigroup,AT&T Mobility, ERCOT, Texas State HHSC - DARS

Technology              : Oracle9i/10g/11g, Sun Solaris/Red Hat Linux, Golden Gate, Informatica, Cognos, Java/J2EE, Oracle Coherence, Oracle Directory Service, Unix Shell Scripting, Informix

Duration              :Jun2007 – Current

Role              :Consultant Manager/Enterprise Architect

Description              :

·         Currently working as LeadDR/HA/MA Architect using Goldengate for RUSA and EFD - Citi Technology Infrastructure (CTI)'s MDM, DW and OLTP systems.

·         Playing vital role in streamlining all the CTI databases (100+) using AIX on IBM PSeries LPARS, RAC and ASM which will cut down maintenance and operational costs significantly.
Other end clients include AT&T Mobility ACSI, ERCOT, Texas State (HHSC).

·         Lead Architect – Played vital role in streamlining hundreds of databases using Oracle 11g, RAC, ASM, Data Guard and RMAN on AIX/Solaris platforms.

·         DR/HA Architect – Involved in Disaster Recovery from planning to operations. Built disaster sites using Oracle Data Guard as well as Goldengate.

·         Data Center Migration – Played key role in cross platform data center migrations from Solaris to AIX as well as Oracle 9i/10g to 11gR2.

·         Application Upgrades/migration – Implemented Goldengate for upgrade of applications like Siebel, Peoplesoft, IBM MDM InfoSphere, Actimize Enterprise Fraud Detection etc with fall back option

·         Review custom tables and custom database code to IBM Infosphere MDM data model

·         Design and lead the implementation of scalable batch loads into IBM Infosphere MDM database to publish up to 400 messages per second using Ab Initio to push data into ODS controllers implemented by IBM service bus.

·         Design and lead the implementation of de-duplication and archiving strategy of MDM data using Ab Initio.

·         Performance Tuning – Expert in providing feasible solutions for all kinds of performance issues – query tuning, instance tuning, application tuning in both OLTP and OLAP environments.

·         Design, Implement and support multiple scalable, highly available, zero downtime, multi-site load balancing Oracle based 50+ TB ODS, EDW, BI and EDI systems using Oracle 9i/10g/11g, ODI, Goldengate, Informatica, Cognos, Tibco and Java.

·         Expert in cross platform database (of any size) migration with negligible downtime. Designed and developed sophisticated frameworks and tools for Oracle databases using PL/SQL, Data Guard, Goldengate and Veridata.

·         Set up uni-directional as well as bi-directional replication including conflict resolution for clients such as ERCOT, AT&T and Citigroup

·         Set up Director to monitor Goldengate targets as well as Veridata to compare data to be in synch between sites

·         Developed custom tools to capture Goldengate through put as well as to fix out of synch data. Standardize deployment process by developing reusable code for different environments.

·         Simulate E-LT using Goldengate and custom PL/SQL code to satisfy real time search requirements.

·         Extensive experience in E-LT using Oracle Data Integrator Loading Knowledge Module and Integration Knowledge Module.

·         Lead and mentor vast array of audience - System and APP DBA teams, development teams (OLTP and OLAP), QA teams, architects etc in areas such as Oracle, Goldengate, ETL, BI etc..

·         Design, develop, tune and document complex ETL using off the shelf products like Informatica, Ab Initio as well as custom code using PL/SQL and Java.

·         Design and publish Cognos Framework models and actively involved in developing reports on both ODS and EDW systems.

·         Integrate data between databases to LDAP, databases to Coherence in memory grids and databases to files in near real time using Goldengate Java User Exits and Java handlers.
Design, develop and review PL/SQL based applications, which publish huge data sets, provide fastest possible responses for customer searches etc.

·         Streamline development and deployment processes by providing custom tools using Oracle PL/SQL, Java and shell scripting.

·         Experience with variety of enterprise scheduling tools.

·         Well versed with Project Management methodologies like PoweRUP and ITUP (AT&T internal) and draft several artifacts satisfying architecture, design and development for different projects.

 

Employer              : Syntax Solutions LLC

Client(s)              : Dell Computers Inc – Austin TX

Technology              :Goldengate, Ab Initio, Oracle PL/SQL

Duration              : Jan 2007 – Jun 2007

Role              :Sr. Database Consultant/Database Architect

Description              :

 

·         Data Modeling (Star and Snowflake schemas) and selective de normalization for Customer, Quote and Order search and provided high level design for stored procedures

·         Migration of tables from clustered structure to partitioned structure

·         Troubleshooting and debugging triggers and stored procedures

·         Provided Data Access Coding using PL/SQL to various applications built in J2EE and .Net

·         Intensively worked on (re)designing and (re)developing logging information about data replication using Triggers and Stored Procedures

·         Replication of data from Tandem (mainframes systems) to Operational Data Stores built on Oracle.

·         Maintaining users, database objects, triggers, provide auditing scripts etc.

·         Actively involved in performance tuning using clustered tables, partitioned tables etc.

·         Intensively worked on Oracle Analytic queries and stored procedures

 

Employer              : Tavant Technologies

Client(s)              :Citi RL (Formerly AMC), Network Solutions

Technology              : Informatica, Oracle 8i/9i PL/SQL, Weblogic, Shareplex, J2EE

Duration              : Aug 2004 – Jan 2007

Role              :Project Lead, Sr. Software Engineer

Description              :             

§         Lead and Mentor team of Oracle and Java Developers and Development DBA

§         Act as a point of contact for database related issues and mentor to both internal and external teams.

§         Change control for both database release and application releases.

§         Review of Java/J2EE code and database releases for integration of several modules.

§         Onsite coordination and troubleshooting both Database Issues and Application issues.

§         Conducting interviews with business users, technical architects, DBAs for creating logical and     physical data models for both OLTP and OLAP/Data Warehouse environments

§         Designing and Developing Data Marts for generating reports for the business forecast

§         Actively involved in designing and developing various courses in ReSolve for default management using Java/J2EE, Struts, EJB, and Web Services etc.

§         Involved in designing and developing data marts using Dimensional Modeling and Java/J2EE for front end.

§         Actively involved in creating and review of the Data Model for the enhancements.

§         Actively involved in ETL and RDL using Informatica and Oracle PL/SQL.

§         Develop and support Shareplex replication to logical standby.

§         Actively involved in designing and developing transformations using Informaticabetween legacy systems and Staging environment.

§         Huge data migration using SQL Loader, Data Pump and Partition exchange etc

§         Provided highly efficient queries for custom reporting tools

§         Define Database Standards for developers as well as DBAs.

§         Design and develop data access layer using Oracle PLSQL and Java/J2EE.

§         Tuning the queries and rewriting the queries in both OLTP and OLAP/Data Warehouse Environments.

§         Migration of Data between different environments using Data Pump, transportable tablespaces, Partition Exchange as well as custom test data generation to facilitate both unit testing as well as functionality testing.

§         Developed POC for the use of Materialized Views, Table Partitioning, Archiving Data, Redefinition of tables and other latest tools provided by Oracle

§         Creating and Managing Schemas/Users in Dev, QA and Production environments

§         Reviewing code that is part of Oracle stored procedures

 

Employer              : Paradigm Infotech

Client              : GE Transportation Systems, Trump Group of Casinos

Technology              : J2EE, JavaBeans, JavaScript., Oracle 8i, Weblogic

Duration              :Dec2003 – August 2004

Role              : Sr. Software Developer

Description              :             

§         Designing the tables required for this project.

§         Developing the modules Requester, Planner and Admin.

§         Actively involved in the creation of stored procedures in Oracle 8i/9i.

§         Performance tuning of queries using hints and query rewriting

§         Data Migration between production and non production environments

§         Design and Develop Custom ETL and Informatica Transformations

§         Monitoring Non Production Databases and performance tuning of the queries

§         Designing and Development of My-Account Modules using JSP/Servlets and XML/XSLT.

§         Used DOM Parsing to parse XML files and SOA for communicating between applications

§         Preparing JUnit tests and communicating requirements and issues between Business Analysts and Developers

§         Implemented concepts like Clusters, Partition tables, Materialized views etc.

§         Reviewing code and defining standards for smooth releases of applications

 

Seminars/Sessions Presented:

 

              RDBMS Concepts and Oracle Architecture in Tavant Technologies

              SQL Queries and Database Objects in Tavant Technologies

              Programming with PL/SQL inTavant Technologies

              Query Level Performance Tuning in Tavant Technologies

              Advanced features of PL/SQL in AT&T and ERCOT (internal within the team)

 

Seminars/Sessions Attended:

 

Informatica 8x, from a Informatica Professional Training conducted by ERCOT

Goldengate Training, from Goldengate Professional Training conducted by ERCOT

CRR, Economies of LMP, Nodal 101 deregulated energy market Training from ERCOT

 

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