Julien Rouhaud
Lead Founding Engineer at Nile
New Taipei, Taiwan
Summary
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RockstarJulien Rouhaud is a Lead Founding Engineer and PostgreSQL Major Contributor with 14+ years of hands-on experience designing, tuning and extending PostgreSQL for both product and enterprise use. He has driven core C-level enhancements and bug fixes in the PostgreSQL community while authoring and maintaining key open-source tools like HypoPG (hypothetical indexes) and PoWA (performance analysis). Julien has held senior engineering roles at VMware and led PostgreSQL consulting and tooling work at Dalibo, combining deep database internals expertise with production-focused engineering. Based in New Taipei, he pairs contributor-level knowledge of index estimation and storage internals with practical deployment experience across commercial and open-source ecosystems. An atypical strength is his repeated role bridging community-driven feature development with product packaging and OS-level distribution (e.g., VMware-postgres on Photon OS).
14 years of coding experience
16 years of employment as a software developer
French, English
Github Skills (15)
c1710
databases10
indices10
extension-functions10
postgresql10
c-extension10
indexer10
indexing10
c1110
relational-databases10
extension-methods10
sql-database10
database10
btree9
sql8
Programming languages (12)
Github contributions (5)
HypoPG/hypopg
Mar 2015 - Jan 2023
Hypothetical Indexes for PostgreSQL
Role in this project:
Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:17 releases, 23 reviews, 367 commits in 7 years 11 months
Contributions summary:Julien appears to be contributing to the development of hypothetical indexes for PostgreSQL, a database extension. Their work involved implementing core functionalities within the extension, including modifications to C source code to build and estimate the size of these indexes. They have worked on enhancements to how hypothetical indexes are stored, and created functions to manage and deparse them. Furthermore, their work is focused on improving the accuracy of index size estimation.
postgresqlhypothetical-indexesdatabasecindexing
OPMDG/opm-doc
Sep 2014 - May 2019
Global documentation of the project
Contributions:57 commits, 5 PRs, 39 pushes in 4 years 8 months
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