I’m Karl Erik Õunapuu, a senior Ruby on Rails developer and freelance software consultant with 8+ years of professional experience building production-grade web applications. I run Kreative Digital OÜ, a freelance consultancy based in Estonia, serving clients worldwide.

My core stack is Ruby on Rails with GraphQL and REST APIs, backed by PostgreSQL, deployed on Kubernetes and AWS. I’ve built e-commerce platforms with ERP/MRP integrations, the Estonian .ee domain registry system, cyber security e-learning platforms, and marketing automation tools for companies like EasyPark.

As a former VP of Engineering, I bring CTO-level strategic thinking to every project — not just code, but architecture decisions, team processes, and technology roadmaps. Whether you need a hands-on senior Rails developer or a fractional CTO, I’m available for freelance contracts and long-term collaborations.

No dev team yet? No problem. I specialize in building products from scratch — from initial architecture and tech stack decisions to a fully deployed, production-ready application. I’ve been the first (and sometimes only) engineer for multiple companies, setting up everything from CI/CD pipelines to cloud infrastructure so you can go from zero to launch without hiring a full team.

• Ruby
• Rails
• Dart
• Flutter
• Kubernetes
• AWS
• REST APIs
• GraphQL
• PostgreSQL / MongoDB
• NextJS
• React
• GitLab CI/CD
• Cypress
• RSpec
• EPP
• DNSSEC