motyl.dev
TrendingNewsletterBlogNewsAbout
Support
Grzegorz Motyl

© 2026 Grzegorz Motyl. Raising the bar of professional software development.

GitHubTwitterEmail
Home
News
Blog
Me
    /
    motyl.dev
    TrendingNewsletterBlogNewsAbout
    Support
    1. Home
    2. News
    3. How 30 Engineers Built WhatsApp for Hundreds of Millions

    How 30 Engineers Built WhatsApp for Hundreds of Millions

    Published on 18.03.2026

    #substack
    #whatsapp
    #engineering-culture
    PRODUCTIVITY

    Building WhatsApp with Jean Lee

    TLDR: Engineer #19 at WhatsApp, Jean Lee, shares the inside story of how 30 engineers served 450 million users with no Scrum, no code reviews after onboarding, and almost zero formal processes — and why that tiny, experienced team crushed competitors with thousands of engineers.

    Building WhatsApp with Jean Lee

    ☕ Knowledge costs tokens,fuel meHelp me keep the content flowing
    External Links (1)

    Building WhatsApp with Jean Lee

    newsletter.pragmaticengineer.com

    Sign in to bookmark these links
    Previous
    Frontend Focus #733: Vite 8, Astro 6, Memory Leaks at Scale, and the 49MB Web Page
    Next
    MiniMax-M2.7 Lands in Kilo — A Deep-Reading Model That Trades Speed for Thoroughness
    Grzegorz Motyl

    © 2026 Grzegorz Motyl. Raising the bar of professional software development.

    GitHubTwitterEmail