SUMMARY:

• Over 7 years of professional IT experience in Analysis, Design, Development, Testing and Implementation of various Data Warehousing and Software Applications.
• Over 6years of extensive experience on Informatica Power Center with strong business understanding and knowledge of Extraction, Transformation and Loading of data from heterogeneous source systems like Flat files, Excel, XML, Oracle, Sybase, SQL Server.
• Experienced in logical and physical data modeling of staging and warehouse environments using Datamodeling tools like ERWin, Rational Rose and Oracle Designer.
• Extensively involved in ETL Data warehousing using Informatica PowerCenter 7.x/8.x/9 Designer tools like Source Analyzer, Target Designer, Mapping Designer, Mapplet Designer, Transformation Developer, Workflow Manager and Workflow Monitor.
• Extensively worked on transformations such as Source Qualifier, Joiner, Filter, Router, Expression, Lookup, Aggregator, Sorter, Normalizer, Update Strategy, Sequence Generator and Stored Procedure transformations.
• Hands on experience in identifying and resolving performance bottlenecks in various levels like sources, mappings and sessions. Hands on experience in optimizing SQL scripts and improving performance loading warehouse.
• Very strong in writing SQL Joins, Nested Queries, Unions, Multi-table joins.
• Experience in scheduling the batch jobs using workflow monitor, ESP, Tivoli, Autosys and FTP methods.
• Worked with Dimensional Data warehouses in Star and Snowflake Schemas, created slowly changing SCD Type1/2/3 dimension mappings.
• Expertise in using SQL LOADER to load Data from external files to Oracle Database.
• Experience in Optimizing the Performance of SQL scripts and Oracle database/application tuning.
• Excellent in coding using SQL, SQL Plus, PL/SQL, Procedures/Functions, Triggers and Packages.
• Developed Batch Jobs using UNIX Shell scripts to automate the process of loading, pushing and pulling data from different servers.
• Good experience in performing and supporting Unit testing, System Integration testing SIT , UAT And production support for issues raised by application users.
• Diverse background with fast Learning and creative Analytical abilities with good Technical, Communication and Interpersonal skills.

TECHNICAL SKILLS:

PROFESSIONAL EXPERIENCE:

Confidential

Role: Sr.Informatica Developer

Responsibilities:

• Involved in complete understanding of business requirement and involved in analyzing the sources to load in Oracle warehouse.
• Designed Sources to Targets mappings from SQL Server, Excel/Flat files to Oracle using Informatica Power Center.
• Responsible for working with DBA and Data Modellers for project coordination.
• Responsible for Detail design of each interface.
• Responsible for developing complex Informatica mappings using different types of transformations like UNION transformation, Connected and Unconnected LOOKUP transformations, Router, Filter, Aggregator, Expression and Update strategy transformations for Large volumes of Data.
• Developed SDE mappings to load large amount of data from different sources to staging area, SID mappings for load the data from staging area to target system
• Implemented slowly changing dimension Type 1 and Type 2 for Change data capture using Version control.
• Responsible for creating Workflows and sessions using Informatica workflow manager and monitor the workflow run and statistic properties on Informatica Workflow Monitor.
• Responsible for Defining Mapping parameters and variables and Session parameters according to the requirements and performance related issues.
• Created various tasks like Event wait, Event Raise and E-mail etc
• Created Shell scripts for Automating of Worklets, batch processes and Session schedule using PMCMD
• Created various Oracle database SQL, PL/SQL objects like Indexes, stored procedures, views and functions for Data Import/Export.
• tuning the Informatica mappings to increase the performance.
• Wrote test plans and executed it at UNIT testing and also supported for system testing, volume testing and User testing. Also provided production support by monitoring the processes running daily
• Extracted Data from FACETS Database.
• Worked on creating HIPAA files from SQL Server database.

Environment: Informatica PowerCenter 9.1/8.6, MS SQL server 2005, Oracle 10g, Data quality,Toad, PL/SQL Stored Procedures, Triggers, Packages , Erwin, MS Visio, Windows XP

Confidential

Role: ETL lead Analyst/ETL Developer

Responsibilities:

• Involved in Requirement Analysis, ETL Design and Development for extracting the data which is stored in different sources like Oracle, SQL Server, Sybase, and DB2.
• Analyzed, designed and developed an environment that would facilitate the use of Informatica to transform data coming from Igrasp oltp into Adim datamarts.
• Developed complex Informatica Mappings with transformations like lookup, router, aggregator, expression, update strategy, joiner and etc.
• Created Connected, Unconnected and Dynamic Lookup transformations for better performance.
• Created sessions, worklets, workflows for the mapping to run daily, biweekly based on the business requirements.
• Extensively used Parameter files, mapping variables in the process of development of the mappings for all the dimension tables.
• Implemented Slowly Changing Dimension type2 methodology in Informatica.
• Worked on handling performance issues of Informatica Mappings, evaluating current logic for tuning possibilities.
• Tuned SQL, PL/SQL Queries in Source qualifier Transformation for better performance.
• Created and executed unit test cases for various scenarios for all the mappings, workflows and scripts.
• Involved in unit testing and fixing the bugs identified, provided data to the reporting team for their daily, weekly and monthly reports.
• Worked on modification of UNIX shell scripts.
• Involved in team weekly and by monthly status meetings.

Environment: Informatica PowerCenter8.5, Oracle10g, Toad, SQL, PL/SQL Stored Procedure, Trigger, Packages , Erwin, MS Visio, Windows 2000, UNIX.

Confidential

Role: ETL/Informatica Consultant

Responsibilities:

• Performed major role in understanding the business requirements and designing and loading the data into data warehouse ETL
• Used ETL Informatica to load data from source to DWH.
• Participated in Performance Tuning of ETL maps at Mapping, Session, Source and Target level as well as writing Complex SQL Queries from ABSTRACT Data model.
• Used techniques like source query tuning, single pass reading and caching lookups to achieve optimized performance in the existing sessions.
• Used Informatica client tools - Source Analyzer, Warehouse designer, Mapping Designer, Mapplet Designer, and Transformation Developer for defining Source Target definitions and coded the process of data flow from source system to data warehouse.
• Used Informatica Workflow Manager and Workflow Monitor to schedule and monitor session status
• Used Informatica Data Migration to decrease the risk and minimize the errors
• Worked on creating HIPAA files from SQL Server database.
• Created complex Informatica mappings, reusable objects of Mapplets depending on client requirements
• Responsible for performance tuning for several ETL mappings, Mapplets, workflow session executions
• Used UNIX Shell scripting for automation of the process, invoking PL/SQL procedures, and Informatica sessions.
• Designed and Developed Oracle PL/SQL procedures, performed Data Import/Export, Data Conversions and Data Cleansing operations.
• Implemented performance tuning logic on Targets, Sources, mappings, sessions to provide maximum efficiency and performance.
• Involved in unit testing and identified new requirements/concerns. Scheduling and rerunning failed jobs as required.

Environment: Informatica PowerCenter 8.1/8.0, SQL, PL/SQL, Oracle 10G, MS SQL server 2005, TOAD Starschemas, Unix Scripting, Flat Files, Windows NT/2000.

Confidential

Role: ETL Informatica Developer

Responsibilities:

• Developed Logical and physical database designs for the transaction system.
• Extract the XML file from source transform it with multiple transformation including XML Transformation.
• Performance tuning on sources, targets, mappings and SQL queries in the transformations.
• Used PL/SQL Views, Triggers, Procedures and Functions.
• Designed and developed complex ETL mappings making use of transformations like Source
• Qualifier, Expression, Joiner, Update Strategy, Connected Lookup and unconnected Lookup, Rank, Router, Filter, Aggregator and Sequence Generator transformations.
• Created reusable transformations and mapplets based on the business rules to ease the development.
• Developed mappings to implement type 2 slowly changing dimensions.
• Developed and implemented the Unix shell script for the start and stop procedures of the sessions.
• Used various Informatica Error handling technique to debug failed session.
• Developed workflow tasks like reusable Email, Event wait, Timer, Command, Decision Used various debugging techniques to debug the mappings.
• Created Test cases for Unit Test, System Integration Test and UAT to check the data quality.
• Created Materialized view for summary data to improve the query performance.

Environment: PowerCenter8.1 ,Oracle9i, SQL Server 2000, SQL,PL/SQL, shell scripts, MS Visio, ERWIN Data Modeling tool, Toad 8.0, Windows 2000,XML,UNIX

Confidential

Role: Informatica Developer

Responsibilities:

• Extensively used Informatica client tools Source Analyzer, Warehouse designer, Mapping designer, Mapplet Designer, Transformation Developer.
• Developed complex mapping using Source qualifier, Aggregators, Connected unconnected lookups, Filters Update strategy.
• Used Lookup Transformation to access data from tables, which are not the source for mapping and also used Unconnected Lookup to improve performance
• Developed reusable Mapplets and Transformations.
• Good knowledge on fixedincome,Derivatives and foreign exchanges also.
• Responsible for transport the data to Target Warehouse Oracle tables on the server, Schedule, Run Extraction and Load process and Monitor sessions by using Informatica workflow manager and workflow monitor
• Create and Administer Repositories using Repository manager of Informatica.
• Worked on creating HIPAA files from SQL Server database.
• Also involved in moving the mappings from Test Repository to Production after duly testing all transformations.
• Calculated the Cache requirements for Lookup, Joiner and Aggregator transformations and increased the memory on Informatica server to avoid the paging to the disc.

Environment: Informatica Power Center 7.1, Oracle 9i, UNIX, Sybase, MS SQL Server 2004, Windows 2000