Personnel: Jaan Tallinn at Skype (Co-founder, Lead Developer)

Note: The source confirms Jaan Tallinn was involved in Skype's development (the P2P technology from Kazaa was repurposed for Skype around 2003) and the approximate start date of 2003 is supported. The end date of 2005 (when he sold shares) is close to the claimed 2008, though the source indicates his active involvement may have ended earlier. However, the source does not explicitly confirm the titles 'Co-founder' or 'Lead Developer'—it only says his technology was 'repurposed' for Skype and that he was involved in its development. The claim is partially supported but lacks explicit confirmation of the specific roles claimed.