Justas Janauskas
Co-Founder Board Member at Wayve
Lithuania
Summary
👤
Senior🎓
Top SchoolJustas Janauskas is a Lithuania-based entrepreneur, investor, and software leader with 13 years of experience turning ideas into scalable tech platforms. As co-founder and board member of Vinted, he helped grow Europe’s largest online international C2C marketplace for second-hand fashion into a mobile-first community spanning 15 markets and 50+ million users. He also contributes to open-source back-end infrastructure, notably the rack-oauth2 project, where he focused on robust OAuth 2.0 token verification and MAC token handling. Beyond Vinted, he actively invests in early-stage ventures across Europe, supporting portfolio companies through hands-on guidance, with activity at COCOLI, Atman Labs, Accel, Kry, Mangrove Capital Partners, and Startup Wise Guys. He holds a Master and Bachelor in Computer Science from Vilnius University, blending academic depth with practical product-building and investment leadership.
13 years of coding experience
18 years of employment as a software developer
Bachelor, Computer Science, Bachelor, Computer Science at Free University of Bozen-BolzanoMaster Computer Science, Master Computer Science at Vilniaus universitetas / Vilnius University
English, Russian
Github Skills (6)
oauth2-110
oauth210
oauth10
ruby10
testing9
security9
Programming languages (2)
Github contributions (3)
nov/rack-oauth2
Aug 2012 - Aug 2012
OAuth 2.0 Server & Client Library. Both Bearer and MAC token type are supported.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:11 commits in 2 days
Contributions summary:Justas primarily contributed to the development and maintenance of the rack-oauth2 library. Their work focused on implementing and refining MAC (Message Authentication Code) access token verification, including handling extensions and time-based expiration checks. They addressed bugs related to timestamp generation and debugging information output. The commits demonstrate a deep understanding of OAuth 2.0 protocols and the underlying security aspects.
oauth-serveroauth-2client-libraryclient-servertoken
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