Building WhatsApp with Jean Lee
Gene Lee, an early engineer at WhatsApp, reveals how a team of just 30 engineers served 450 million users by rejecting standard agile processes like code reviews and stand-ups in favor of extreme simplicity and quality fsummaryWhatsApp operated with zero formal processes (no code reviews, no stand-ups, no TDD) because the small team size (under 30 engineers) allowed for direct communication and trust, contrasting sharply with Skype's 10,000 entakeawayWhatsApp supported eight different tech stacks (iOS, Android, Blackberry, Windows Phone, Nokia S40/S60, Kyios, Web) to ensure maximum global reach, rather than using cross-platform frameworks that might not perform well takeaway
