LEXIS AI

An AI-powered cloud PBX for Greek businesses: AI phone agents answer inbound calls 24/7, run outbound campaigns, and hand off to humans when a call needs one. About a year of engineering across telephony, voice AI, and cloud, built as a multi-node system that bridges traditional SIP infrastructure with modern LLM voice agents.

Key Features

• AI Phone Personas - Five branded voice agents with distinct personalities, powered by a full STT-LLM-TTS pipeline
• Inbound with Human Fallback - One number fans out to multiple assistants through a dynamic router, with ring groups for human escalation
• AI Outbound Campaigns - An event-driven dialer works through lead lists, qualifies prospects, and books appointments automatically
• Credit-Based Billing - Stripe checkout with credit packs and subscriptions, plus per-call cost reconciliation across two currencies
• Secure Multi-Tenancy - Row-level security throughout, hardened after full-system security audits

Technology Stack

• Dashboard: Next.js 16, React 19, TypeScript, Tailwind, deployed on Cloudflare Workers
• Telephony: FreePBX and Asterisk (AMI/ARI), Node.js webhook backend and campaign dialer, MikroTik and WireGuard networking for customer onboarding
• Voice AI: VAPI.ai agents with ElevenLabs TTS
• Backend: Self-hosted Supabase on private VPS infrastructure, Stripe billing

Designed, built, and operated solo: four separate services deployed across Cloudflare Workers, systemd, and on-premise telephony hardware.