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John Frantzis

@johnfrantzis

Full-stack product developer building production SaaS, including Lux Nails, a salon platform with booking, CRM, and business integrations.

Greece

Message

I built and operate Lux Nails, a production SaaS used daily in my beauty business, with appointments, CRM, staff workflows, and online booking.

For Beautio, I built a multi-user salon SaaS with booking, staff management, payments, and customer automations.

I built CartEcho, a Shopify SaaS for abandoned-checkout recovery, with AI voice calls, SMS, billing and multilingual workflows.

My other products include BuildDeal, a two-sided marketplace, and InvoiceLens, for invoice and document processing. I work end to end, from product architecture through production deployment.

Experience

Work history, roles, and key accomplishments

Owner and Full-Stack Developer

Lux Nails

Built and operate a production SaaS for a beauty business, including appointments, CRM, staff workflows, online booking, automated SMS/social booking, and MIRKA and POS integrations.

SaaS CRM Appointments Online Booking SMS Automation POS Integration Mirka Production Deployment

Founder and Developer

CartEcho

Built a Shopify SaaS for abandoned-checkout recovery with AI voice calls, SMS, automations, billing/usage logic, Shopify integrations, and multilingual workflows.

Shopify AI Voice SMS Automation Billing Multilingual SaaS

Founder and Developer

BuildDeal

Built a two-sided marketplace with authentication, project listings, professional profiles, offers/bidding workflows, dashboards, and marketplace logic.

Marketplace Authentication Listings Bidding Dashboarding Full Stack

Founder and Developer

Beautio

Built a multi-user salon SaaS with CRM, online booking, multi-staff calendar, staff management, payments, SMS/email automations, reviews, and analytics.

SaaS CRM Online Booking Calendars Payments SMS Automation Email Automation Analytics