A digital identity platform for creating and sharing business cards. One profile feeds many cards, each assembled from reorderable modules, themed, and published as a page with QR, vCard, PDF and NFC sharing. Key achievements: - Separated profile, card, module and theme so identity data lives in one place, with per-card overrides that fall back to the profile - Wrote a dual-provider AI layer over the Anthropic and OpenAI REST APIs using forced tool calls, so a generated card comes back schema-valid, with a deterministic generator behind it that keeps the feature working when no key is configured - Resolved vanity subdomains in Next.js middleware, mapping a handle to that user's primary card while keeping one canonical URL so the apex and subdomain copies do not compete in search - Built lead capture through to follow-up: a themed contact form, a contacts dashboard with CSV export, and HMAC-signed webhooks with per-attempt logging, manual retry and a cron-guarded background re-attempt - Added a moderation path for public user content, covering rate-limited reports, an operator queue, unpublish with a reason, and allow-listed outbound links - Shipped team mode with a shared brand kit and invite links, Stripe subscription tiers editable from the operator console, and an EN/FR interface