May 2018 – Apr 2019 · 11 mos · Sunnyvale, California, United States

• Lead developer on Big Data application framework CDAP (cdap.io).
• As part of CDAP on Cloud initiative, working on storage Service Provider Interface for CDAP, to allow CDAP to work with either NoSQL or SQL storage engines.

Jan 2013 – May 2018 · 5 yrs 4 mos · Palo Alto, CA

• Designed pluggable security framework for authentication and authorization in CDAP (Cask Data Application Platform). Integrated CDAP with Apache Sentry and Apache Ranger.
• Worked on Data Lineage in CDAP as part of Data Governance initiative.
• Integrated CDAP with Apache Hive, to provide SQL access to CDAP datasets.
• PMC chair of Apache Tephra. Apache Tephra provides distributed transactions over Apache HBase. Tephra is used by Apache Phoenix and CDAP for transactions support.
• PMC member of Apache Twill. Apache Twill provides abstraction over Apache YARN to develop distributed applications.
• Led successful on-boarding of a SaaS company to process a billion events a day in near realtime with CDAP.
• Provided technical training and ongoing support to customers for developing and running Big Data applications with CDAP.
• Mentored junior team members and interns.

Jun 2012 – Jan 2013 · 7 mos · San Mateo, CA

• Worked on a monitoring system for Greenplum's Hadoop distribution (GPHD).

May 2006 – Jun 2012 · 6 yrs 1 mo · Sunnyvale, CA

• Working on high performance Java server that ranks content in real time based on user profiles for Yahoo! Content optimization team (CORE). This server powers Yahoo! sites like Yahoo! Homepage and Yahoo! News with qps over 7000.
• Worked on traffic shaping sub-project for CORE server where the ads running on content page influence the content ranking in addition to user profiles. This required more than 50k predicates based on ad-targeting to be evaluated within 35-40ms for each request.
• Designed and implemented a real time feed pipeline for indexing advertiser/publisher data in Yahoo! Apt.
• Implemented a fast look-up data structure for Yahoo! Apt taxonomy hierarchy.

Feb 2003 – May 2006 · 3 yrs 3 mos · Bangalore, India

• Enhancements and maintenance of Yahoo! Audio Search.
• Worked in Yahoo! Direct, which provided an email-marketing platform to target Yahoo! users based on their declared interests.

Oct 2002 – Feb 2003 · 4 mos · Bangalore, India

• Software integration testing of operational software of Boeing 777 Long Ranger's (B777LR) Air Supply and Cabin Pressure Controller (ASCPC).