Chief Executive Officer and co-founder, Klarna.
Co-founded Klarna in 2005 with Niklas Adalberth and Victor Jacobsson while on a sabbatical from the Stockholm School of Economics (master's degree, per Wikipedia); CEO since founding; took Klarna public on the NYSE in September 2025.
Why their word counts: Runs the company and signs its earnings releases, so Siemiatkowski knows the numbers; Siemiatkowski is also promoting the company's AI story to investors and press. Role from Klarna's leadership page; career from Wikipedia.
Profile from this source, checked 2026-10-19.
Photo: TechCrunch, Wikimedia Commons, CC BY 2.0.
We ask them if they want to work part-time in customer service
Sebastian SiemiatkowskiChief Executive Officer and co-founder · Executive, 
Klarna
Interview: CX Foundation (specialist customer-experience media and analyst site), CX Foundation (specialist customer-experience media and analyst site), February 17, 2026. Reported by Charlie Mitchell.
We need to rethink this and make customer service a human experience. Everyone who wants a human connection should get it.
Sebastian SiemiatkowskiChief Executive Officer and co-founder · Executive, Klarna
Interview: CX Foundation (specialist customer-experience media and analyst site), CX Foundation (specialist customer-experience media and analyst site), February 17, 2026. Reported by Charlie Mitchell.
The reason for that is because I’ve seen the acceleration of AI, and I know we can ship all these things on the existing organization,
Sebastian SiemiatkowskiChief Executive Officer and co-founder · Executive, Klarna
Interview: Fortune (business magazine), Fortune (business magazine), February 17, 2026. Reported by Jacqueline Munis.
