Arun Vijayvergiya

Co-Founder

San Francisco, California, United States17 yrs 8 mos experience

Most Likely To SwitchHighly Stable

Key Highlights

Stackforce AI infers this person is a SaaS and AI expert with strong software engineering and system architecture skills.

Software EngineeringSystem ArchitectureProduct DesignEngineeringWeb Development

JavaJavaScriptC++CSSSQLHTMLGitC#PHPObjective-CMobile ApplicationsMobile DevicesAlgorithmsData AcquisitionAPI Development

17 yrs 8 mos

Total Experience

3 yrs 6 mos

Average Tenure

4 yrs 5 mos

Current Experience

Dec 2021 – Present · 4 yrs 5 mos

Product Tech lead and co-creator of ChatGPT
Founding member of a first-party apps team that created ChatGPT
Scaled product/infra from 0-~150MM+ users
Designed and implemented entirely new production infra to power browsing, plugins, code execution and many other ChatGPT features
Learned insomnia as part of a 4-person oncall rotation from Dec 2022-May 2023. We eventually got a 5th person.
Manager, Data Acceleration, Foundations (Research)
Responsible for dataset prep for GPT 4.5, o3, o4(-mini), GPT 5, and intermediate runs
Built, maintained and scaled tooling for data acquisition, prep and experimentation
Learned how long multiple exabytes take to transfer between regions
IC, Data Acquisition, Pretraining (Research)
Created and maintained an acquisition pipeline for partner data
Directly contributed to long-context coherence and intelligence improvements in o3, o4(-mini) and GPT-5
Taught the model fun puzzles
API
Scaled and maintained inference fleet for pre-GPT-4 APIs
Built and launched API for DALL-e 2
Implemented inference architecture for Whisper engines
Took down a whole prod cluster once
Search on ChatGPT
Founding member of the search (formerly SearchGPT) team
Prototyped, built and iterated on search product experience with emphasis on speed and recall

JavaJavaScriptSoftware EngineeringC++CSSSQL+10

Dec 2018 – Dec 2021 · 3 yrs · San Francisco, California, United States

Creator of Viaduct, Airbnb’s data-oriented service mesh. (https://medium.com/airbnb-engineering/taming-service-oriented-architecture-using-a-data-oriented-service-mesh-da771a841344).
Started initiative from scratch. Recruited, collaborated with and directed a team of stellar ICs on the project. The system served 80% of all Airbnb traffic at the end of 2021.

JavaSoftware EngineeringSystem Architecture

May 2014 – Dec 2018 · 4 yrs 7 mos

Y-Combinator backed startup trying to make a private search engine of your own life.
Role: CEO
Product design, engineering as well as fundraising, recruitment, marketing.
Technical:
Best in class location engine for iOS, optimizing for battery usage. Patented system for collecting signals and making them taggable and correlatable.
Write-heavy backend system built on RDS, AWS streaming infra and AWS Lambdas.
https://techcrunch.com/2016/08/10/former-facebook-engineers-launch-fabric-an-automated-personal-journal-of-your-life/
https://in.pcmag.com/iphone-apps/106469/fabric-is-facebook-memories-on-a-whole-new-level
https://newscenter.io/2016/08/inventor-facebook-timeline-launches-app-auto-logs-personal-digital-footprints/

Product DesignEngineeringFundraisingMarketing

Aug 2009 – Dec 2013 · 4 yrs 4 mos · Palo Alto, CA

Major projects:
Timeline: Created the initial prototype for the Facebook Timeline at a hackathon. Architected and launched the timeline system, with special emphasis on ranking of posts for recall. Also owned the migration to a new backend system. (https://www.facebook.com/note.php?note_id=10150468255628920)
Platform Data Model: Architected and owned the permissioning system for Facebook Applications, including login, authentication and extended permssions for data access.
Facebook iOS integration: Worked with Apple on third-party authentication, contacts sync, and calendar sync.
Single Sign-on for Mobile: Two-step login to mobile applications using Facebook.

Software EngineeringSystem Architecture

Jun 2008 – Aug 2008 · 2 mos

Apr 2005 – Aug 2006 · 1 yr 4 mos · Greater Delhi Area

Started the web project with two engineers. Created the entire stack, including database architecture to store user information, algorithms and storage techniques to search for directions, localized search techniques for India.

Web DevelopmentAlgorithms