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I build and ship AI products end to end: backend, prompts, integrations, and product decisions. For the past two years I’ve been shipping production systems using the Anthropic Claude API, including Replyo—a guest-messaging tool for short-term rental hosts—and a contracted AI platform for automated website generation. I also develop my own agentic tooling, including an unattended Claude Code harness that runs overnight against a task queue. Before going full-time on product, I spent three years in B2B sales, which shapes how I build—so what I create gets in front of real users within a week.…I build and ship AI products end to end: backend, prompts, integrations, and product decisions. For the past two years I’ve been shipping production systems using the Anthropic Claude API, including Replyo—a guest-messaging tool for short-term rental hosts—and a contracted AI platform for automated website generation. I also develop my own agentic tooling, including an unattended Claude Code harness that runs overnight against a task queue. Before going full-time on product, I spent three years in B2B sales, which shapes how I build—so what I create gets in front of real users within a week.

Nikolaos Manolis Kavala

AI Engineer, Full Stack Developer, Back-End Developer, +4

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I build and ship AI products end to end: backend, prompts, integrations, and product decisions. For the past two years I’ve been shipping production systems using the Anthropic Claude API, including Replyo—a guest-messaging tool for short-term rental hosts—and a contracted AI platform for automated website generation. I also develop my own agentic tooling, including an unattended Claude Code harness that runs overnight against a task queue. Before going full-time on product, I spent three years in B2B sales, which shapes how I build—so what I create gets in front of real users within a week.…I build and ship AI products end to end: backend, prompts, integrations, and product decisions. For the past two years I’ve been shipping production systems using the Anthropic Claude API, including Replyo—a guest-messaging tool for short-term rental hosts—and a contracted AI platform for automated website generation. I also develop my own agentic tooling, including an unattended Claude Code harness that runs overnight against a task queue. Before going full-time on product, I spent three years in B2B sales, which shapes how I build—so what I create gets in front of real users within a week.

Available to hire

I build and ship AI products end to end: backend, prompts, integrations, and product decisions. For the past two years I’ve been shipping production systems using the Anthropic Claude API, including Replyo—a guest-messaging tool for short-term rental hosts—and a contracted AI platform for automated website generation.

I also develop my own agentic tooling, including an unattended Claude Code harness that runs overnight against a task queue. Before going full-time on product, I spent three years in B2B sales, which shapes how I build—so what I create gets in front of real users within a week.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

Greek, Modern

Fluent

English

Fluent

German

Beginner

Work Experience

AI Engineer (Contract) at Bookerty

January 1, 2026 - Present

Designed and delivered an automated website generation platform for short-term rental hosts. Sole engineer responsible for Claude-driven content generation from property/listing data, templating, and automated deployment so a host receives a live website without using a page builder. Negotiated the contract personally, including objective acceptance criteria and clauses attributing delays to their true cause.

Founder and AI Engineer at Replyo

January 1, 2025 - Present

Built Replyo, an AI guest-messaging tool for short-term rental hosts across Booking.com, WhatsApp, and email using the Anthropic Claude API. Routed messages to Haiku or Sonnet based on difficulty to keep replies fast and token cost predictable. Implemented autonomy modes (full auto, draft for approval, or off) to help hosts ramp trust gradually. Added a classifier to flag complaints, refund requests, and urgent messages for human review. Full-stack ownership including Node.js/Express backend, React frontend, Supabase multi-tenant data isolation, Stripe billing, and GDPR-compliant data erasure; ran a live beta and shipped changes based on real usage.

Founder and Automation Engineer at Vaktir

January 1, 2025 - Present

Pings hotel guests when the northern lights are about to appear; built rules engine with per-user thresholds, timezone-aware forecast windows, and a polar-night edge case where alerts shut off; stack includes React, TypeScript, Node.js, and PostgreSQL; delivery via Twilio and Resend.

Autonomous Claude Code Harness Builder at Independent Project

January 1, 2025 - Present

Built an agent harness that runs Claude Code unattended against a task queue with structured context handoff; defined CLAUDE.md operating spec; loop feeds tasks end-to-end.

Founder & Lead Builder at Replyo

January 1, 2025 - Present

AI-powered guest-messaging tool for short-term rental hosts; built routing to Claude Haiku and Claude Sonnet, three autonomy modes, and a classifier for complaints/refunds/urgent messages; multi-tenant architecture; Stripe billing.

Business Sales Representative at Blue Nile (Ireland)

February 1, 2023 - January 1, 2026

Handled 50+ customer conversations daily across live chat and email; achieved over €2 million in sales in 2024. Introduced AI drafting workflows that saved time across the team and mentored new reps through onboarding.

Internal AI Workflows Builder at Blue Nile

January 1, 2023 - January 1, 2026

Built reusable prompts and response templates for the sales team; mapped which parts of customer conversations could be automated; adopted by other reps.

Founder at Independent E-Commerce Venture

December 1, 2020 - May 1, 2022

Ran a profitable remote dropshipping business; managed sourcing, orders, and customer communication. Built a Google Sheets tracker to visualize what was selling and at what margin, increasing sales by approximately 30%.