PROFESSIONAL SUMMARY:

• 5+ years of IT experience in Data Warehousing technology and all phases of Software Development Life Cycle (SDLC) including Business Requirement Analysis, Application designing, Development, Implementations and Testing of Data warehousing and Database business systems for Banking, Financial and Insurance domains.
• Excellent experience in designing and development of ETL Methodology using Informatica PowerCenter 10.2, 9.6.1/9.1.1.
• Having experience in working with ORACLE 12c/11g, MySQL, SQL Server 2012/2014 databases.
• Moderate experiencein Change Data Capture (CDC) Methodology using Informatica PowerCenter 10.x/9. x
• Interacted with end - users and functional analysts to identify and develop Business Requirement Document (BRD) and transform it into technical requirements.
• Worked extensively in design and analysis of Requirements, Development, Testing and Production deployment.
• Prepared various types of documents like requirements gathering, ETL specification, Data Mapping, Test cases, Data dictionary etc.
• Expert in writing SQL query using multiple databases like ORACLE, SQL Server, MySQL etc.
• Extensive knowledge of Informatica tuning and SQL tuning.
• Experience in integration of various data sources into staging area.
• Performed Unit testing, System testing, Integration testing and users for UAT and prepared test report in different phases of project.
• Extensive experience with Data Extraction, Transformation, and Loading (ETL) from Multiple Sources.
• Designed and developedcomplex mappings, Mapplets, tasks and workflows and tuned it.
• Experience in Debugging and Performance tuning of targets, sources, mappings and sessions in Informatica.
• Good understanding of the Data modeling concepts like Star-Schema Modeling, Snowflake Schema Modeling.
• Experience in optimizing the Mappings and implementing the complex business rules by creating re-usable transformations like Mapplets.
• Extensively used Slowly Changing Dimension (SCD) technique in business application.
• Experience in Performance tuning of ETL process using pushdown optimization and other techniques. Reduced the execution time for huge volumes of data for a company merger projects. Heavily created mapplets, user defined functions, reusable transformations, look-ups.
• Conducted Unit tests, Integration tests and Customer Acceptance tests (UAT).
• Working experience in Agile and Waterfall methodologies.
• Experience working with Onsite and Offshore model and while working in that project ensured proper work assignment and review.
• Excellent communication skills, ability to communicate effectively with executive and management team, having strong analytical, problem solving skills.

TECHNICAL SKILLS:

ETL TECHNOLOGY: Informatica PowerCenter 10.2, 9.x

DATA WAREHOUSE: Star Schema, Snowflake schema

DATA MODELLING: Erwin 9.5/7.1

DATABASES: Oracle 12c/11g/10g, MS SQL Server 2016/2014, MySQL

APPLICATIONS: MS Office, Toad 9.2/8.6Others:TOAD, SQL, WinSCP, Putty, Rally

PROFESSIONAL EXPERIENCE:

Confidential, Baltimore, MD

Informatica Developer

Responsibilities:

• Worked with business analyst for requirement gathering, business analysis, testing, business process descriptions, scenarios and workflow analysis.
• Created Technical Design Document from business requirements document (BRD).
• Analyzed business and system requirements to identify system impacts.
• Created the Detail Technical Design Documents which have the ETL technical specifications for the given functionality.
• Prepared source to target mapping and conducted meetings with the business to understand data / transformation logic.
• Analyzed the existing mapping logic to determine the reusability of the code.
• Created Mapping Parameters, Session parameters, Mapping Variables and Session Variables.
• Done the extensive performance tuning by determining bottlenecks at various points like targets, sources, mappings, sessions or system. This led to better session performance.
• Created Unit test plans and did unit testing using different scenarios separately for every process. Involved in System test, Regression test and supported the UAT for the client.
• Performing ETL and database code migrations across environments using deployment groups.
• Populating the business rules using mappings into the target tables.
• Involved in end-to-end system testing, performance and regression testing and data validations.
• Managed performance and tuning of SQL queries and fixed the slow running queries in production.
• Created batch scripts for automated database build deployment.

Environment: Informatica PowerCenter 10.2, Cognos 10, SQL, Oracle 12c, MySQL, TOAD, Control M, Rally

Confidential, Richmond, VA

Informatica Developer

Responsibilities:

• Actively involved in interacting with business users to record user requirements and Business Analysis.
• Used Informatica Power Centerfor (ETL) extraction, transformation and loading data from heterogeneous source systems like Flat file, SQL Server 2012 and Oracle 11ginto target database which is oracle11g.
• Documented Data Mappings/ Transformations as per the business requirement.
• Prepared Technical Design documents and Test cases.
• Created mappings using Designer and extracted data from various sources, transformed data according to the requirement.
• Developed Informatica Mappings and Reusable Transformations to facilitate timely Loading of Data of a star schema.
• Developed the Informatica Mappings by usage of Aggregator, SQL overrides usage in Lookups, source filter usage in Source qualifiers, and data flow management into multiple targets using Router.
• Created Sessions and extracted data from various sources, transformed data according to the requirement and loading into data warehouse tables.
• Developed several reusable transformations and mapplets that were used in other mappings.
• Developed transformation logic as per the requirement, created mappings and loaded data into respective targets.
• Used SQL tools like TOAD to run SQL queries to view and validate the data loaded into the warehouse.
• Created summarized tables, control tables, staging tables to improve the system performance and as a source for immediate recovery of database
• Migrated Mappings, Sessions, Workflows from Development to Test and then to UAT environment.
• Wrote hundreds of SQL query for data analysis to validate the input data against business rules.
• Responsible for determining the bottlenecks and fixing the bottlenecks with performance tuning.
• Extensively worked on Unit testing for the Informatica code using SQL Queries and Debugger.
• Used PMCMD command to start, stop and ping server from UNIX.
• Improved performance testing in Mapping and the session level.
• Coordinated with Autosys team to run Informatica jobs for loading historical data in production.

Confidential, Minneapolis, MN

Informatica Developer

Responsibilities:

• Co-ordination from various business users’ stakeholders and SME to get Functional expertise, design and business test scenarios review, UAT participation and validation of data from multiple sources.
• Worked on Power Center Designer tools like Source Analyzer, Warehouse Designer, Mapping Designer, Mapplet Designer and Transformation Developer.
• Used Debugger within the Mapping Designer to test the data flow between source and target and to troubleshoot the invalid mappings.
• Created Mappings using Mapping Designer to load the data from various sources, using different transformations like Source Qualifier, Expression, Lookup (Connected and Unconnected), Aggregator, Update Strategy, Joiner, Filter, and Sorter transformations.
• Used SQL to analyze source data, performed data analysis and validate the data.
• Scheduled Informatica Jobs through Autosys scheduling tool.
• Studying the existing system and conducting reviews to provide a unified view of the program.
• Extensively worked on Mapping Variables, Mapping Parameters, Workflow Variables and Session Parameters.
• Involved in creating Informatica mappings, Mapplets, worklets and workflows to populate the data from different sources to warehouse.
• Responsible to facilitate load testing and benchmarking the developed product with the set performance standards.
• Involved in testing the database using complex SQL scripts and handled the performance issues effectively.

Environment: Informatica Power Center 9.1.1, Oracle 11g, SQL, SQL Server 2014, UNIX, Congo’s, JIRA