Vincent Coste · Director of Engineering, Meta Business Agent · San Francisco

Employee #9.
Then a billion users.
Now, AI agents.

I build products from zero to a billion users, and now AI agents for millions of businesses. Eighteen years, five chapters:

  1. Learn

    2008–2013 · Siemens, OCTO, ChooseYourBoss

    Architecture and agile consulting in Paris, then co-founding ChooseYourBoss inside Figaro Classifieds — my first product taken from problem interviews to market.

  2. Build

    2013–2017 · Omada Health

    Joined as employee #9. Built the first iOS app and Rails API, then grew into VP Engineering and turned engineering into full-stack product teams.

  3. Lead

    2017–2020 · Remix, Getaround

    At Remix, three new product lines and core revenue tripled before the acquisition by Via. At Getaround, a turnaround across four sites that cut burn by 80%.

  4. Scale

    2020–2025 · Meta

    Shipped the alpha of Messenger Communities (later 70M+ daily users), then co-founded Broadcast Channels and grew it to nearly a billion users across Instagram, Messenger and Facebook.

  5. Agents

    2025–now · Meta Business Agent

    Leading engineering for LLM-powered agents that serve 4M businesses every week — support, lead qualification, discovery, booking and commerce — with an org of about 80–90.

What carries across

Great teams and the right amount of process deliver amazing results. I think in three Ps — the product a team ships, the people who ship it, and the process that serves them.

With AI, a prototype that took a team a month now takes one engineer an afternoon. So I build teams that are smaller, more senior, closer to the customer, and judged on how fast they learn, not how much they ship.

Also

Side projects: Tsundoku, OneOne, Appibabies (100k+ downloads), Hubluc, Tips by 100. Co-author of Les géants du web. MSc, EPITA Paris. French and English.

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