SUMMARY:

• Over 7+ years of IT experience in all phases of Software Development Life Cycle (SDLC) which includes User Interaction, Business Analysis/Modeling, Design, Development, Integration, Planning and testing and documentation in data warehouse applications, ETL processing and distributed applications.
• Excellent domain knowledge of Retails,Healthcare andManufacturing.
• 7 years of Strong expertise in using ETL Tool Informatica Power Center 7.1/8.x/9.x (Designer, Workflow Manager, Repository Manager, Data Quality (IDQ) and ETL concepts.
• Extensive experience with Data Extraction, Transformation, and Loading (ETL) from disparate data sources like Multiple Relational Databases (Teradata, Oracle, SQL SERVER, DB2), VSAM and Flat Files
• Experience in Informatica PowerCenter with WebService Sources and Targets.
• Strong experience with Informatica tools using real - time Change Data Capture and MD5.
• Performed the data profiling and analysis making use of Informatica Data Quality (IDQ).
• Worked with various transformations like Normalizer, expression,rank, filter, group, aggregator, lookups, joiner, sequence generator, sorter, SQLT, stored procedure, Update strategy, Source Qualifier, Transaction Control, JAVA, Union, CDC etc.,
• Worked with Teradata utilities like Fast Load and Multi Load and Tpump and Teradata Parallel transporter and highly experienced in Teradata SQL Programming.
• Experienced in Teradata Parallel Transporter (TPT). Used full PDO on Teradata and worked with different Teradata load operators.
• Designing and developing Informatica mappings including Type-I, Type-II, Type-III slowly changing dimensions (SCD).
• Experienced in using advanced concepts of Informatica like push down optimization (PDO).
• Validating data files against their control files and performing technical data quality checks to certify source file usage.
• Experienced in writing SQL, PL/SQL programming, Stored Procedures, Package, Functions,Triggers, Views, Materialized Views.
• Experience in Performance Tuning and Debugging of existing ETL processes.
• Experience in working with Power Exchangeto process the VSAM files.
• Hands on experience in writing UNIX shell scripts to process Data Warehouse jobs.
• Very good in data modeling knowledge in Dimensional Data modeling, Star Schema, Snow-Flake Schema, FACT and Dimensions tables.
• Coordinating with Business Users, functional Design team and testing team during the different phases of project development and resolving the issues.
• Strong Knowledge of Hadoop Ecosystem (HDFS, HBase, Spark, Scala, Hive, Pig, Flume, NoSQL, MapReduce etc.)
• Good skills in defining standards, methodologies and performing technical design reviews.
• Excellent communication skills, interpersonal skills, self-motivated, quick learner, team player.

TECHNICAL SKILLS:

ETL Tools: Informatica PowerCenter 9.6/8.x, Informatica PowerExchange9.6/8.x, Informatica Data Quality 9.x

Languages: C, C++, SQL, PL/SQL, HTML, XML, UNIX Shell Scripting

Methodology: Agile RUP, SCRUM, Waterfall

Databases: Oracle 11g/10g, SQL Server 2012/2008/2005/2000 DB2, Teradata 14/13, UDB DB2,Sybase

Operating Systems: Windows NT, 2003, 2007, UNIX, Linux

IDEs: PL/SQL Developer, TOAD, Teradata SQL Assistant

Modelling Tool: Erwin 9.1/7.2, MS Visio

Scheduling Tools: Control-m, Autosys

Hadoop / Big Data: Cloudera, HDFS, HBaase, Spark, Scala, Hive, Pig, Flume, NoSQL, MapReduce

Reporting: Tableau 9.2, Cognos 9/8

Others Tool: JIRA, Notepad++, Teradata SQL Assistant, Teradata view point MS office, T-SQL, TOAD, SQL Developer, XML Files, Icescrum, JIRA, Control - M, Autosys, GitHub, ORACLE ERP, PUTTY, SharePoint, SVN

PROFESSIONAL EXPERIENCE:

Confidential, Winston-Salem, NC

Sr. Informatica Developer

Responsibilities:

• Analyze business requirements, technical specification, source repositories and physical data models for ETL mapping and process flow.
• Worked extensively with mappings using expressions, aggregators, filters, lookup, joiners, update strategy and stored procedure transformations.
• Extensively used Pre-SQL and Post-SQL scripts for loading the data into the targets according to the requirement.
• Developed mapping to load Fact and Dimension tables, for type 1 and type 2 dimensions and incremental loading and unit tested the mappings.
• Extracted data from a web service source, transform data using a web service, and load data into a web service target.
• Experience in real time Web Services which performs a lookup operation using key column as input and provided response with multiple rows of data belonging to key.
• Used Web Service Provider Writer to send Flat file target as attachments and also for sending email from within a mapping.
• Imported Hive table using PowerExchange.
• PowerExchange for Hadoop accesses Hadoop to extract data from HDFS or load data to HDFS/Hive.
• Coordinate and develop all documents related to ETL design and development.
• Involved in designing the Data Mart models with ERwin using Star schema methodology.
• Used repository manager to create repository, user’s groups and managed users by setting up privileges and profile.
• Used debugger to debug the mapping and correct them.
• Performed Database tasks such as creating database objects (tables, views, procedures, functions).
• Responsible for debugging and performance tuning of targets, sources, mappings and sessions.
• Optimized the mappings and implementing the complex business rules by creating re-usable transformations and Mapplets.
• Involved in writing BTEQ, MLOAD and TPUMP scripts to load the data into Teradata tables.
• Optimized the source queries in order to control the temp space and added delay intervals depending upon the business requirement for performance
• Used Informatica workflowmanager for creating, running the Batches and Sessions and scheduling them to run at specified time.
• Executed sessions, sequential and concurrent batches for proper execution of mappings and set up email delivery after execution.
• Preparing Functional Specifications, System Architecture/Design, Implementation Strategy, Test Plan & Test Cases.
• Implemented and documented all the best practices used for the data warehouse.
• Improving the performance of the ETL by indexing and caching.
• Created Workflows, tasks, database connections, FTP connections using workflow manager.
• Responsible for identifying bugs in existing mappings by analyzing data flow, evaluating transformations and fixing bugs.
• Code walks through with team members.
• Developed stored procedures using PL/SQL and driving scripts using Unix Shell Scripts.
• Created UNIX shell scripting for automation of ETL processes.
• Used UNIX for check in’s and check outs of workflows and config files in to the Clearcase.
• Automated ETL workflows using Control-M Scheduler.
• Involved in production deployment and later moved into warranty support until transition to production support team.
• Experience in monitoring and reporting issues for the Daily, weekly and Monthly processes. Also, work on resolving issues on priority basis and report it to management.

Environment: Informatica PowerCenter 9.6.1, IDQ 9.6.1, Oracle 11g, Teradata 14.1.0, WebService, Hadoop, Hive,Teradata SQL Assistant, MSSQL Server 2012, DB2, Erwin 9.2, DAC Scheduler, Putty, Shell Scripting, Clearcase, Putty, WinSCP, Notepad++, JIRA, Control-M V8, Hyperion Server, OBIEE Reporting.

Sr. 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 Hospital applications - like EPIC, Allscript, PATCOM etc.
• 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.
• Extensively worked on Mapping Variables, Mapping Parameters, Workflow Variables and Session Parameters.
• Worked on Power Center Designer tools like Source Analyzer, Warehouse Designer, Mapping Designer, Mapplets 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.
• Worked on SQL tools like TOAD and SQL Developer to run SQL Queries and validate the data.
• Scheduled Informatica Jobs through Autosys scheduling tool.
• Extensively used advance chart visualizations in Tableau like Dual Axis, Box Plots, Bullet Graphs, Tree maps, Bubble Charts, Water Fall charts, funnel charts etc., to assist business users in solving complex problems.
• Developed of key indicators and the appropriate tracking reports with graphical and written summations using summary and Annotations to assist in the quality improvement initiatives.
• Created quick Filters Customized Calculations, Conditional formatting for various analytical reports and dashboards.
• Studying the existing system and conducting reviews to provide a unified view of the program.
• Involved in creating Informatica mappings, mapplets, worklets and workflows to populate the data from different sources to warehouse.
• Created Global Prompts, Narrative Views, Charts, Pivot Tables, Compound layouts to design the dashboards.
• Responsible to facilitate load testing and benchmarking the developed product with the set performance standards.
• Used MS Excel, Word, Access, and Power Point to process data, create reports, analyze metrics, implement verification procedures, and fulfill client requests for information.
• Used Teradata utility like BTEQ, FLOAD MLOAD and TPUMP scripts to load the data into Teradata tables.
• Involved in testing the database using complex SQL scripts and handled the performance issues effectively.
• Involved in Onsite & Offshore coordination to ensure the completeness of Deliverables.

Environment:: Informatica PowerCenter 8.6.1/8.1.1, Cognos 9, SQL Server 2008, IDQ 8.6.1, Oracle 11g, PL/SQL, TOAD, Putty, Autosys Scheduler, UNIX, Teradata 13, Erwin 7.5,ESP, WinScp

ETL Informatica Developer

Responsibilities:

• Gathering requirements and implement them into source to target mappings.
• Experience in integration of data sources like SQL server and MS access and non-relational sources like flat files into staging area.
• Designing custom reports via SQL Reporting Services to align with requests from internal account teams and external Clients.
• Designed and developed Technical and Business Data Quality rules in IDQ (Informatica Developer) and created the Score Card to present it to the Business users for a trending analysis (Informatica Analyst)
• Effectively worked on Mapping Designer, Workflow Manager, and Workflow Monitor.
• Extensively used Sequence Generator in all mappings and fixed bugs / tickets raised in production for existing mappings in common folder for new files through versioning (Check in and Check out) on an urgency through support for QA in component unit testing and validation.
• Used shortcuts for sources, targets, transformations, mapplets, and sessions to reuse objects without creating multiple objects in the repository and inherit changes made to the source automatically.
• Integrated Informatica Data Quality (IDQ) with Informatica PowerCenter and Created POC data quality mappings in Informatica Data Quality tool and imported them into Informatica PowerCenter as Mappings, Mapplets
• Applied slowly changing Dimensions Type I and Type II on business requirements.
• Extensively worked on performance tuning and also in isolating header and footer in single file.
• Working with large amounts of data independently executing data analysis, utilizing appropriate tools and techniques (Interpreting results and presenting them to both internal and external client.
• Writing SQL queries to create end-user reports /Developing SQL Queries and stored procedures in support of ongoing work and application support.
• Used Cognos Transformer to build multidimensional cubes
• Designing and executing test scripts and test scenarios, reconciling data between multiple data sources and systems.
• Involved in requirement gathering, Design, testing, project coordination and migration.
• Project planning and scoping, facilitating meetings for project phases, deliverables, escalations and approval. Ensure adherence to SDLC and project plan.
• Worked on Multidimensional Models and created Reports in Report Studio using Cubes as a data sources.
• Effectively understood session error logs and used debugger to test mapping and fixed bugs in DEV in following change procedures and validation.
• Raised change requests, analyzed and coordinated resolution of program flaws and fixed them in DEV and Pre-Production environments, during the subsequent runs and PROD.
• Perform analysis profiling on existing data and identify root causes for data inaccuracies, Impact Analysis and recommendation of Data Quality.
• Precisely documented mappings to ETL Technical Specification document for all stages for future reference.
• Scheduled jobs for running daily, weekly and monthly loads through control-M for each workflow in a sequence with command and event tasks.
• Created requirement specifications documents, user interface guides, and functional specification documents, ETL technical specifications document and test case.
• Used most of the transformations such as the Aggregators, Filters, Routers, Sequence Generator Update Strategy, Rank, Expression, lookups (connected and unconnected), Mapping Parameters, Session parameters, Mapping Variables and Session Variables.
• Responsible for studying the existing data warehouse and also working on migrating existing PL/SQL packages, stored procedures, triggers and functions to Informatica Power Center.
• Fine-tuned ETL processes by considering mapping and session performance issues.
• Responsible for Creating workflows and Worklets. Created Session, Event, Command, Control, Decision and Email tasks in Workflow Manager.
• Maintained the proper communication between other teams and client.

Environment:: Informatica Power Center 8.1, SQL, PL/SQL, UNIX, Shell Scripting,SQL Server 2008, Sybase, Oracle 11g, DB2, Control-M, Cognos 8.4.

ETL Informatica Developer

Responsibilities:

• Involved in full life cycle development including Design, ETL strategy, troubleshooting Reporting, and Identifying facts and dimensions.
• Reviewing the requirements with business, doing regular follow ups and obtaining sign offs.
• Designed and developed mappings, mapplets and sessions from source to target database using Informatica PowerCenter.
• Worked with various file formats like fixed length and delimited.
• Used Debugger extensively to validate the mappings and gain troubleshooting information about data and error conditions.
• Developed various mappings using Mapping Designer and worked with Source qualifier, aggregator, connected unconnected lookups, Filter transformation, and sequence generator transformations.
• Extensively used Informatica to transfer data from different source system and load the data into the target database.
• Extracted the data from the flatfiles and other RDBMS databases into stagingarea and populated onto Data Warehouse.
• Developed number of complexInformaticamappings, mapplets and reusabletransformations to implement the business logic and load the data incrementally.
• Used Debugger to track the path of the source data and to check the errors in mapping.
• Handled slowly changing dimensions of Type 1 and Type 2 to populate current and historical data to dimensions and facttables in the Data Warehouse.
• Developed Informatica mappings by usage of aggregator, SQL overrides in lookups, source filter and source qualifier and data flow management into multiple targets using router transformations.
• Implemented the best practices for the creation of mappings, sessions and workflows and performance optimization.
• Created Informatica Technical and mapping specification documents according to Business standards.
• Extensively involved in performance tuning of the ETL process by determining the bottlenecks at various points like targets, sources, mappings, sessions or systems. This led to a better sessionperformance.
• Document the process for further maintenance and support. Worked on test cases and use cases.

Environment:: Informatica Power Center 8.1, IDQ 8.1, Oracle 10g, Toad, SQL Developer, UNIX

ETL Informatica Developer

Responsibilities:

• Interacted with business community and gathered requirements based on changing needs and incorporated identified factors into Informatica mappings to build Data Marts.
• Designed and developed complex mappings using Mapping Designer to load data from various sources.
• Extensively created mapplets for reusable business rules.
• Used Pipelinepartitioning and ExternalLoader to improve Sessionperformance, createdindicatorfiles for event drivensessions.
• Used the updatestrategy to effectively load data from source to target.
• Involved in Data Quality Assurance, created validation routines, unit test cases and test plan.
• Created tasks, workflows and worklets using workflowmanager.
• Used pmcmd to run workflows and Autosys to automate their schedules.
• Involved in identifying bugs in existingmappings by analyzing the data flow, evaluating transformations and fixing bugs so that they conform to the business needs.
• Handled Incrementalloading using mappingvariables and Implemented versioning of folders in the Informatica Designer tool.
• Used Parameter files to specify DB Connection parameters for sources.

Environment:: Informatica Power Center 8.1, Business Objects XI, Oracle 10g, PL/SQL, SQL*Plus, SQL Server 2000, XML files, UNIX Shell Scripting, Windows NT/2000. Teradata V2R6.