--- title: RT @Pragmatic_Eng: How Jan Koum (WhatsApp cofounder and... description: A brief quote about Jan Koum's (WhatsApp cofounder and CEO) leadership style, specifically his habit of saying 'no' approximately 99% of the time as a... canonical: https://daily.dev/posts/rt-pragmatic-eng-how-jan-koum-whatsapp-cofounder-and-ceo-operated-jan-said-no-a-lot-almost-9-ehbiu1v2y twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: RT @Pragmatic_Eng: How Jan Koum (WhatsApp cofounder and CEO) operated: "Jan said no a lot. Almost 99% of the time, he would say 'no.' As a… | daily.dev og:description: A brief quote about Jan Koum's (WhatsApp cofounder and CEO) leadership style, specifically his habit of saying 'no' approximately 99% of the time as a... og:url: https://daily.dev/posts/rt-pragmatic-eng-how-jan-koum-whatsapp-cofounder-and-ceo-operated-jan-said-no-a-lot-almost-9-ehbiu1v2y og:image: https://api.daily.dev/og/posts/ehBIu1V2Y.png og:image:alt: RT @Pragmatic_Eng: How Jan Koum (WhatsApp cofounder and CEO) operated: "Jan said no a lot. Almost 99% of the time, he would say 'no.' As a… og:image:width: 1200 og:image:height: 630 og:locale: en --- [Gergely Orosz](https://daily.dev/sources/gergelyorosz) [Read on](https://api.daily.dev/r/ehBIu1V2Y) Mar 26 • From x.com  Gergely Orosz @gergelyorosz RT @Pragmatic\_Eng: How Jan Koum (WhatsApp cofounder and CEO) operated: "Jan said no a lot. Almost 99% of the time, he would say 'no.' As a… Comment Bookmark Copy Share your thoughts Post [](https://daily.dev/sources/gergelyorosz) [Gergely Orosz](https://daily.dev/sources/gergelyorosz "https://daily.dev/sources/gergelyorosz") 11 Followers • 10 Upvotes #### Would you recommend this post? Copy link Slack WhatsApp Facebook X New Squad Copy linkShare with your friends ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"RT @Pragmatic_Eng: How Jan Koum (WhatsApp cofounder and CEO) operated:\n\n\"Jan said no a lot. Almost 99% of the time, he would say 'no.' As a…","url":"https://daily.dev/posts/rt-pragmatic-eng-how-jan-koum-whatsapp-cofounder-and-ceo-operated-jan-said-no-a-lot-almost-9-ehbiu1v2y","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/rt-pragmatic-eng-how-jan-koum-whatsapp-cofounder-and-ceo-operated-jan-said-no-a-lot-almost-9-ehbiu1v2y"},"datePublished":"2026-03-26T21:52:45.692Z","dateModified":"2026-03-26T21:53:01.218Z","description":"A brief quote about Jan Koum's (WhatsApp cofounder and CEO) leadership style, specifically his habit of saying 'no' approximately 99% of the time as a...","image":"https://media.daily.dev/image/upload/s--OHB84bZF--/f_auto/v1722860399/public/Placeholder%2010","thumbnailUrl":"https://media.daily.dev/image/upload/s--OHB84bZF--/f_auto/v1722860399/public/Placeholder%2010","isAccessibleForFree":true,"articleSection":"Gergely Orosz","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Gergely Orosz","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/5913dfda1e3349739acbb1766dca37c5","url":"https://daily.dev/sources/gergelyorosz"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/rt-pragmatic-eng-how-jan-koum-whatsapp-cofounder-and-ceo-operated-jan-said-no-a-lot-almost-9-ehbiu1v2y","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":""} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Gergely Orosz","item":"https://daily.dev/sources/gergelyorosz"},{"@type":"ListItem","position":3,"name":"RT @Pragmatic_Eng: How Jan Koum (WhatsApp cofounder and CEO) operated:\n\n\"Jan said no a lot. Almost 99% of the time, he would say 'no.' As a…"}]} ```