Arun Vijayvergiya

Co-Founder

San Francisco, California, United States17 yrs 8 mos experience
Most Likely To SwitchHighly Stable

Key Highlights

  • Co-creator of ChatGPT with 150MM+ users.
  • Founder of a Y-Combinator backed startup.
  • Architected Facebook's Timeline feature.
Stackforce AI infers this person is a SaaS and AI expert with strong software engineering and system architecture skills.

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Skills

Core Skills

Software EngineeringSystem ArchitectureProduct DesignEngineeringWeb Development

Other Skills

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

Experience

17 yrs 8 mos
Total Experience
3 yrs 6 mos
Average Tenure
4 yrs 5 mos
Current Experience

Openai

Member Of Technical Staff

Dec 2021Present · 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

Airbnb

Software Engineer

Dec 2018Dec 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

Fabric - the story of your life that writes itself

Founder / CEO

May 2014Dec 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

Facebook

Software Engineer

Aug 2009Dec 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

Microsoft

Intern

Jun 2008Aug 2008 · 2 mos

  • CLR / Sorted Set.

Mapmyindia

Developer / Consultant

Apr 2005Aug 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

Education

University of California, Berkeley

BS — EECS

Jan 2005Jan 2009

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