He does not limit himself to PostgreSQL' open source and development. When google started their Chromium project he contribute many features in Chromium project. He also contribute some feature in Google Chrome web browser and is in Chrome developer list.
He has developed, and maintains, a number of PostgreSQL extensions that communicate
with other RDBMS's, such as MySQL; NoSQL databases, such as MongoDB; and parallel file
system storage, such as HDFS. He has authored another book, PostgreSQL Developer's Guide,
for Packt Publishing.
He has mater degree in computer science and MS computer engineering. He has a believe that one never stop getting the education, and keep increasing the knowledge. Now he is pursuing his Phd in computer science.