Λογιστής AI

An AI assistant that answers Greek tax and accounting questions in seconds, with citations to the actual laws. Users ask in plain Greek; the system searches official sources, synthesises an answer with Claude, and returns the relevant law articles together with a confidence score. A production SaaS with paying customers, recurring subscriptions, and four-figure MRR, designed from scratch and built solo.

Key Features

• Cited Answers - Every answer references the specific law articles it is based on, with a High/Medium/Low confidence score
• Trusted Sources Only - Retrieval is locked to official Greek tax sources, with a strict citation-honesty rule that eliminates fabricated references
• RAG Architecture - Retrieval pipeline with re-ranking and data augmentation, plus a Python data pipeline that parses official gazette PDFs into an embeddings corpus
• Subscription Billing - Tiered Stripe subscriptions for freelancers, businesses, and professional accountants
• Growth Engineering - Zero-cost SEO content engine and full-funnel conversion tracking, from ad click to purchase

Technology Stack

• Frontend: Next.js 15, React 19, TypeScript, Tailwind
• AI: Claude via the Anthropic SDK, with a secondary fast model for query generation and AI-powered web search
• Backend: Supabase (auth and Postgres), Stripe billing
• Infrastructure: Cloudflare Workers with custom domain, Turnstile bot protection

Owned end-to-end: product strategy, system design, AI engineering, full-stack implementation, infrastructure, and customer-facing operations.