SUMMARY

• Over 7+ years of experience in Information Technology with a strong back ground in Analyzing, Designing, Developing, Testing, and Implementing of Data Warehouse development in various domains such as Banking, Insurance, Health Care, Telecom and Wireless.
• Extensive Data Warehousing experience using Informatica Power center 9.x/8.x/7.x, Informatica Power Mart 7.x/6.x, Power Exchange, Informatica IDQ.
• Expertise in Database development using Oracle 11g/10g/9i/8i, SQL, PL/SQL stored procedures, Functions, Packages, Programming, etc.
• Involved in Installation, Configuration, and Administration of Informatica Power Center/Power Mart Client/Server.
• Experienced in complete life cycle Implementation of data warehouse.
• Expertise in building Enterprise Data Warehouses (EDW), Operational Data Store (ODS), Data Marts, and Decision Support Systems (DSS) using Data modeling tool ERWIN and Dimensional modeling techniques (Kimball and Inmon), Star and Snowflake schema addressing Slowly Changing Dimensions (SCDs).
• Expert knowledge in Trouble shooting and performance tuning at various levels such as source, mappings, target and sessions.
• Experience in the concepts of building Fact Tables, Dimensional Tables, handling Slowly Changing Dimensions.
• Expertise in designing and Developing complex Mappings using Informatica Power Center Transformations - Lookup, Filter, Expression, Router, Joiner, Update Strategy, Aggregator, Stored Procedure, Sorter, Sequence Generator, XML transformation, etc.
• Sound experience in using Informatica Workflow Manager to create Sessions, Batches and schedule workflows, Developing complex Mapplets, Worklets, Re-usable Tasks, Re-usable Mappings, Monitoring Sessions, Export & Import Mappings & Workflows, Backup & Recovery.
• Expertise in doing Unit Testing, Integration Testing, System Testing and Data Validation for Developed Informatica Mappings.
• Data loading using UNIX Shell scripts, SQL*Loader.
• Experience in dealing with various databases like Oracle 11x/10g/9i/8x, SQL Server 2008/2005, Teradata, DB2Excel sheets, Flat Files and XML files.
• Well Experienced in doing Error Handling and Troubleshooting using various log files.
• Good exposure to development, testing, debugging, implementation, documentation and production support.
• Experience in handling initial and incremental loads in target database using mapping variables.
• Developed effective working relationships with client team to understand support requirements, develop tactical and strategic plans to implement technology solutions, and effectively manage client expectation.
• Excellent written, communication skills and possessed analytic problem skills in evaluating business and technical processes and issues, develops and implements system enhancements to facilitate overall operations.

TECHNICAL SKILLS

Data Warehousing: Informatica Power Center 9.6.1/9.5/9.1/8.6/8.1 , Informatica Power Mart 8.x/7.x,Informatica Power Exchange, Informatica Analyst/ Informatica IDQ.

Data Modeling: Ralph-Kimball Methodology, Bill-Inmon Methodology, Star schema, Snowflake schema, Dimensional data modeling, Snowflake modeling,Fact Tables, Dimension Tables.

Databases/Files: Oracle 11g/10g/9i/8i, SQL Server 2008/2005,Teradata, DB2, XML and Flat files.

Oracle Utilities: TOAD 9.x/8.x/7.x,Oracle SQL Developer, SQL * Plus.

Operating Systems: Windows 7/vista/NT/2000/XP,UNIX/ Linux.

Reporting Tools: OBIEE, Business Objects, Cognos 10.x/8.x

Modeling Tools: Erwin 9.1, SQL Loader 11g/10g, ER-Studio.

Scheduling Tools: Autosys, Control-M, ASG-Zena

Programming: SQL, PL/SQL, T-SQL, C, C# (.NET), HTML, ASP.NET.

Scripting: UNIX Shell Scripting,Korn Shell Scripting, Perl Scripting.

PROFESSIONAL EXPERIENCE

Confidential, San Jose CA

Sr Informatica Developer

Responsibilities:

• Extensively worked in all phases of SDLC.
• Extensively used Informatica Power Center 9.6.1 to extract data from various sources and load in to staging database.
• Involved in SQL Query tuning and provided tuning recommendations to ERP jobs.
• Used Explain Plan, Oracle hints and creation of new indexes to improve the performance of SQL statements
• Extensively worked with Informatica Tools - Source Analyzer, Warehouse Designer, Transformation developer, Mapplet Designer, Mapping Designer, Repository manager, Workflow Manager, Workflow Monitor, Power Exchange, Repository server and Informatica server to load data from flat files, legacy data.
• Extensively used transformations such as Source Qualifier, Aggregator, Expression, Lookup, Router, Filter, Update Strategy, Joiner, Transaction Control and Stored Procedure.
• Designed the mappings between sources (external files and databases) to operational staging targets.
• Involved in data cleansing, mapping transformations and loading activities.
• Developed Informatica mappings and Mapplets and also tuned them for Optimum performance, Dependencies and Batch Design.
• Used Informatica debugging techniques to debug the mappings and used session log files and bad files to trace errors occurred while loading.
• Implemented Slowly Changing Dimension methodology for Historical data.
• Designing mapping templates to specify high level approach.
• Extensive hands on XML import/export, deployment groups, query generation, migration using informatica repository manager.
• Extensively worked on unit testing and implemented on transformations, mappings.
• Created Test cases and detailed documentation for Unit Test, System, Integration Test and UAT to check the data quality.
• Coordinated between Development, QA and production migration teams.

Environment: Informatica Power Center 9.6.1,Oracle 11g, Teradata, MSSQL SERVER 2012,UNIX Shell scripting, Business Objects XI R3,Autosys, TOAD, SQL Developer, Power Exchange 9.1,OBIEE, Win XP, Win SCP

Confidential, IRVING, TX

Sr. Informatica Developer

Responsibilities:

• Involved in Data modeling design, Designing specifications and Documentation of Data Warehouse using ETL (Extraction, Transformation and Load) tool Informatica Power Center 9.5.
• Analyzing existing database schemas and designing star schema models to support the users reporting needs and requirements.
• Extensively used Informatica Power Center 9.5.1 to create and manipulate source definitions, target definitions, mappings, mapplets, transformations, re-usable transformations, etc.
• Involved in design and development of complex ETL mappings and stored procedures in an optimized manner.
• Finding the Informatica mappings bottlenecks and optimizing the mappings to get the best performance and tuning the SQL queries as well.
• Implemented partitioning and bulk loads for loading large volume of data.
• Used Informatica debugging techniques to debug the mappings and used session log files and bad files to trace errors occurred while loading.
• Implemented daily error tracking and correction process using Informatica and Tidal.
• Involved in performance tuning of mappings, transformations and (workflow) sessions to optimize session performance.
• Developed Informatica SCD type-I, Type-II mappings. Extensively used almost all of the transformations of Informatica including complex lookups, Stored Procedures, Update Strategy, mapplets and others.
• Developed workflow tasks like reusable Email, Event wait, Timer, Command, Decision.
• Creating Test cases and detailed documentation for Unit Test, System, Integration Test and UAT to check the data quality.

Environment: Informatica Power center 9.5.1, oracle 11g, Power Exchange, Web Services,TOAD 10.6 for oracle, PL/SQL, ER-studio, Autosys, DB2,, XML, Flat Files, Windows 7, Linux, Cognos 8.4.

Confidential, Plano, TX

Sr. Informatica Developer

Responsibilities:

• Studied and understood the warehouses, sources, and functionally analyzed the application domains, involved in various knowledge transfers from dependent teams understand the business activities and application programs and document the understandings for internal team referencing.
• Interacted with functional/end users to gather requirements of core reporting system to understand exceptional features users expecting with ETL and Reporting system and also to successfully implement business logic.
• Study of detailed requirement of end users of system & their expectations from Applications.
• Involved in the data analysis for source and target systems and good understanding of Data Warehousing concepts, staging tables, Dimensions, Facts and Star Schema, Snowflake Schema.
• Business process re-engineering to optimize the IT resource utilization.
• Integration of various data sources like Oracle, SQL Server, Fixed Width and Delimited Flat Files, DB2, COBOL files & XML Files.
• Identify the flow of information, analyzing the existing systems, evaluating alternatives and choosing the “most appropriate" alternative.
• Understand the components of a data quality plan. Make informed choices between sources data cleansing and target data cleansing.
• Initiate the data modeling sessions, to design and build/append appropriate data mart models to support the reporting needs of applications.
• Change Data Capture using the Power Exchange.
• Used features like email notifications, scripts and variables for ETL process using Informatica Power Center.
• Involved in Data Extraction from Oracle and Flat Files using SQL Loader Designed and developed mappings using Informatica Power Center.
• Developed slowly changed dimensions (SCD) Type 2 for loading data into Dimensions and Facts.
• Involved in Data Extraction from Oracle and Flat Files, XML Files using SQL Loader, Freehand SQL.
• Using Toad to increase User productivity and application code quality while providing an interactive community to support the user experience.
• Created the Test cases and Captured Unit test Results.
• Extensively used ETL to load data from Flat files which involved both fixed width as well as Delimited files and also from the relational database, which was Oracle 9i/10g.

Environment: Informatica Power Center 8.6, Oracle 11g, PL/SQL, MSSQL SERVER 2008,UNIX Shell scripting, IBM DB2, Business Objects XI R3, ESP Schedule, TOAD, SQL Developer, Humming Bird, Power Exchange 8.6, Win XP, Win SCP.

Confidential, Irving, TX

Informatica Developer

Responsibilities:

• Actively involved in gathering requirements and acquiring application knowledge from Business Managers& Application Owners.
• Prepared the High-level Design document to provide an overview of the technical design specification system required for Application Enhancements.
• Involved in understanding the business requirements and translate them to technical solutions.
• Worked for preparing design documents and interacted with the data modelers to understand the data model and design.
• Created new mappings and updating old mappings according to changes in Business logic.
• Involved in migrating project from UAT to Production.
• Setting up of the local Informatica environment on the client machines which included the connectivity and access to the data sources, taking the necessary steps to set up the Relational Connectivity variables in the Workflow manager etc.
• Created XML targets based on various non XML sources.
• Generated sequence numbers using Informatica logic without using the sequence generator.
• Used SQL override to perform certain tasks essential for the business.
• Worked with flat file, xml file and SQL server tables as targets.
• Implemented XML web services using C #.NET and ASP.NET.
• Implemented Performance tuning in Mappings and Sources.
• Mapplets and Reusable Transformations were used to prevent redundancy of transformation usage and modularity.
• Created and Modified PL/SQL, T-SQL stored procedures for data retrieval.
• Defined Target Load Order Plan for loading data into Target Tables.
• Used mapping variables to achieve certain goals like creating file names dynamically.
• Developed mappings to support incremental loading. Used change data capture (CDC) tables as source tables for incremental.
• Responsibilities included designing and developing complex Informatica mappings including Type-II slowly changing dimensions.
• Unit testing of mappings and testing of various conditions.
• Developed Unix Shell scripts for customizing the delivery of Flat files to the customer.
• Involved in the documentation of the ETL process with information about the various mappings, the order of execution for them and the dependencies.
• Prepared the Standard Operating Procedure (Knowledge Transfer) document, which provides necessary information, required for the Maintenance and Operation of the application.
• Provided data loading, monitoring, system support and general trouble shooting necessary for all the workflows involved in the application during its production support phase.

Environment: Informatica Power center 8.6, Oracle 10g, TOAD, SQL, PL/SQL, T-SQL, UNIX Shell Scripting, Autosys, Windows XP, SQL Server 2005 and XML,SAP R3, Flat files, Toad, Solaris 10, Autosys, ODBC, Power Analyzer.