Julien Chaffraix
Founder at Tyche Software LLC
California, United States
Summary
👤
Senior🎓
Top SchoolJulien Chaffraix is a founder and seasoned software engineer with 16 years' experience building systems from embedded and browser engines to backend services and data pipelines. Based in California, he has held senior engineering roles at Google and Slack where he focused on scalable, secure infrastructure and product-quality code. An active open-source contributor, Julien has strengthened security and authentication handling in the widely used curl project, improving Kerberos/GSSAPI code and hardening protocol handling. He teaches and volunteers at CodePath and has experience mentoring interview candidates, reflecting a commitment to developer education. Julien blends deep systems-level expertise with pragmatic product instincts, and prefers slower LinkedIn responses—expect weeks for a reply.
16 years of coding experience
17 years of employment as a software developer
None, Informatics, None, Informatics at The University of EdinburghEngineer's degree, Informatics, Engineer's degree, Informatics at École des Mines de Saint-ÉtienneMathematics, Physics, Chemistry, Mathematics, Physics, Chemistry at Aux Lazaristes
English, French
Github Skills (14)
c1710
it-security10
gssapi10
c1110
kerberos10
security10
ftp9
common-library8
c-library8
webclient8
standard-library8
clientside8
http7
curl6
Programming languages (6)
Github contributions (5)
curl/curl
May 2010 - Jul 2011
A command line tool and library for transferring data with URL syntax, supporting DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP, HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTMP, RTMPS, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET, TFTP, WS and WSS. libcurl offers a myriad of powerful features
Role in this project:
Back-end & Security Engineer
Back-end & Security EngineerContributions:54 commits in 1 year 1 month
Contributions summary:Julien primarily contributed to the improvement of the security aspects of the `curl/curl` repository. Their work involved fixing memory leaks, refactoring and optimizing security-related code, specifically concerning the Kerberos and GSSAPI authentication mechanisms. They also updated and tightened up the handling of security protocols. Additionally, they made improvements to the FTP commands.
rtmppop3dictscptelnet
jchaffraix/dproofreaders
Jun 2024 - Mar 2025
Distributed Proofreaders is a web application intended to ease the process of converting public domain books into e-texts.
Contributions:93 pushes, 107 branches in 8 months
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