From Janitor to Billionaire: WhatsApp Founder Jan Koum's Inspiring Journey

• Jan Koum, WhatsApp founder, rose from poverty after immigrating from Ukraine with his mother, who battled cancer.
• He worked as a janitor and relied on food stamps; the building where he collected food stamps later became WhatsApp's office.
• Koum taught himself computer programming, dropped out of college for a Yahoo job, and later co-founded WhatsApp with Brian Acton.
• Driven by his experience with expensive calls, he built WhatsApp to connect people globally without cost, ads, or data tracking.
• Despite initial failure and financial struggles, Koum and Acton maintained their principles, eventually selling to Facebook but leaving when values clashed.