Products I've built, led and shipped .

Fractional CTO & Founding Engineer · Part-time

I built the Rails and Hotwire platform for a staff training marketplace, then led it through its SOC 2 Type 2 audit and ISO 27001 certification.

• Ruby on Rails
• Hotwire
• SOC 2
• ISO 27001

Senior Full-Stack & AI Engineer · Project-based

I built the production RAG and semantic search behind an AI research assistant for pharma, over hundreds of thousands of document sections, across Rails, FastAPI and Angular.

• Ruby on Rails
• Python
• FastAPI
• Angular

Senior Rails Engineer · Project-based

Back as a contractor on the platform I co-founded and its sister product Health4Crew, which runs PEME exams for 14 shipping companies through 117 clinics. DNA and biomarker reports, email ticketing, AI case summaries on Amazon Bedrock and Stripe billing.

• Ruby on Rails
• Amazon Bedrock
• Stripe
• Kamal

Sole Engineer · Part-time

I am the only engineer on a live marketplace for independent creators in Greece and Cyprus, with thousands of orders a year, from features and releases to production fixes.

• Ruby on Rails
• MariaDB
• Elasticsearch
• GitHub Actions

Technical Lead & Rails Engineer · Project-based

I built the management platform of a Greek sports academy with one other engineer, from thousands of athletes, teams and attendance to fees and receipts. A second club runs on it too.

• Ruby on Rails
• PostgreSQL
• Hotwire
• Kamal

Fractional CTO & Senior Backend Engineer · Part-time

Fractional CTO and the only backend engineer at a real estate marketplace that raised about €3M and was later acquired. I owned the Rails API, AWS and deployments and built the AI price estimator.

• Ruby on Rails
• PostgreSQL
• Python
• AWS

Fractional CTO · Part-time

I owned the Rails API, operations, CI/CD and Stripe payments for a sports venue booking app and moved it off Heroku onto Kamal with GitHub Actions deploys.

• Ruby on Rails
• Redis
• Stripe
• React Native

Senior Rails Engineer · Project-based

I built Property Invest, a property auction investment marketplace, with one other engineer for a Greek proptech that raised a €5.5M Series A led by Eurobank.

• Ruby on Rails
• PostgreSQL
• Stripe

Ruby on Rails Developer · Contract

I delivered workflow automation for approval and access rules at a UN agency and built dynamic role-based access control for its internal applications.

• Ruby on Rails
• PostgreSQL

Ruby Developer · Contract

I joined on a short contract as the only Ruby developer on a legacy API and helped scale it ahead of Black Friday.

• Ruby
• Grape
• PostgreSQL

Co-Founder & Senior Rails Engineer

I built and launched the chronic-care product as first engineer, grew the engineering team to six and led the React Native apps. It now serves 650 organisations with more than 250,000 patient records and 500,000 appointments, including the largest oncology hospital in Greece, with IQVIA as a client.

• Ruby on Rails
• Hotwire
• React
• React Native

Web and Ruby on Rails Developer

Rails work at Denteo, Nimber, AtNet, VisionMobile, CLONE SYSTEMS and Cluey plus freelance projects, after a start in 2006 with WordPress, Joomla and PHP.