BlockChat allows users to establish secure, intentional connections via phone numbers, email, or QR codes, enabling conversations only with selected contacts. User conversations are not stored, ensuring strong data ownership and privacy. I led the end-to-end product experience across connection flows, secure messaging, and privacy focused voice interactions, collaborating closely with the CTO, engineering team, and business marketing teams. For several months after launch, I worked directly with customer support to translate real user feedback improvements, ensuring that privacy principles remained usable in real world contexts. Blockchat launched successfully.