OBJECTIVE:

EXPERIENCE:

11/2011 - Present

Senior Datastage Developer

Generating DB scripts from Data modeling tool and Creation of physical tables in DB.Worked SCDs to populate Type I and Type II slowly changing dimension tables from several operational source filesCreated some routines (Before-After, Transform function) used across the project.Experienced in PX file stages that include Complex Flat File stage, DataSet stage, LookUp File Stage, Sequential file stage.Implemented Shared container for multiple jobs and Local containers for same job as per requirements.Adept knowledge and experience in mapping source to target data using IBM Data Stage 8.xImplemented multi-node declaration using configuration files (APT_Config_file) for performance enhancement.Experienced in developing parallel jobs using various Development/debug stages (Peek stage, Head & Tail Stage, Row generator stage, Column generator stage, Sample Stage) and processing stages (Aggregator, Change Capture, Change Apply, Filter, Sort & Merge, Funnel, Remove Duplicate Stage)Debug, test and fix the transformation logic applied in the parallel jobsInvolved in creating UNIX shell scripts for database connectivity and executing queries in parallel job execution.Used the ETL Data Stage Director to schedule and running the jobs, testing and debugging its components & monitoring performance statistics.Experienced in using SQL *Loader and import utility in TOAD to populate tables in the data warehouse.Successfully implemented pipeline and partitioning parallelism techniques and ensured load balancing of data.Deployed different partitioning methods like Hash by column, Round Robin, Entire, Modulus, and Range for bulk data loading and for performance boost.Repartitioned job flow by determining DataStage PX best available resource consumption.Created Universes and reports in Business object Designer.

7/2008 - 10/2011

Senior Datastage Developer

Implemented the logic to update the loaded, rejected and unloaded records of the staging table using multiple instance of a single update jobDeveloped many complex Job Sequence utilizing user Variable Activity, Terminator Activity, StartLoop, EndLoop, Notification Activity, Routine Activity etcUsed unix scripts for passing parameters into the Job sequence and also developed Bath run tables to update load start timestamp and load end timestamp.Created backup of Datastage project into clearcase software and restored as and when required.Used IBM Tivoli Workload Scheduler for scheduling the jobs.Responsible for Business Analysis and Requirements Collection to develop ETL to extract data from XML Clob using latest XML Input stages of 8.5 versionTuned oracle SQL queries by creating indexes on the key columnInvolved in creating PL/SQL Stored Procedures, Packages, and Triggers for the application, tuning SQL queries and the database.Performed tuning on sluggish ETL jobs by introducing manual partitioning, reducing stages, tuning Source and Target SQL queries, creating indexes on tables etc.Extensively worked in creating table design and maintained the ETL functional mapping documents.Extensively used stages such as Oracle Connector (8.5), Oracle enterprise (8.1), Transformer with loop function, Sparse and Range Lookups, XML input in addition to normally used stages as join, merge, filter, aggregator, funnel, dataset, sequential file etcPerformed extensive research and implemented the slowly changing dimension logic to suit the project business rules using initial and incremental loads.Derived a logic for initial reload of data into the staging table for a scenario to reload data before a past cut off time.Derived and implemented a method to capture rejected records from all ETL jobs into a specially designed reject staging table.Derived and implemented a method to insert rejected records from previous loads along with new data using staging variables in Transformer stage.

5/2005 - 6/2008

Datastage Developer

Automated processes using the Unix shell scripts.Since processing of huge files from Omniture was involved, performance tuning of the mappings, sessions and workflows played a huge role in bringing down the running time.Co-ordinated with Omniture to resolve source file related issues.Wrote test cases for integration testing.Performed data profiling of the sources using Talend open source tool before beginning the development work. That helped me identify the data patterns.Analyzed data related issues and proposed possible solutions and picked the best one after the consultations based on ROI.Worked on the Revenue data mart which involved a lot of mappings with complicated data calculations where the totals have to absolutely precise.During development work, focused on reusability and simplicity to get the best performance.Used advanced mapping techniques to make the most of the Informatica tool.Worked with the users directly for requirements as well as any data related issues.Documented all the processes for the ease of understanding for the new recruits as well as for the existing ones.Have provided production support and resolved critical issues.Have worked on deployment documentation and coordinated with all the teams involved for a smooth deployment.Have tested Business objects reports as a part of the overall test plan.Worked with heterogeneous sources and targets and also with third party vendors.

EDUCATION:

3/2002 - 4/2005

Master's Degree

LANGUAGES:

Languages

Proficiency Level