Karl Erik Õunapuu
Software Developer
About Me
I help companies turn ideas into fast, reliable, and scalable web applications. With 8+ years of Ruby on Rails expertise and deep experience in GraphQL, REST, and complex backend systems, I deliver solutions that drive real business results.
I've built everything from academic anti-plagiarism platforms to marketing tools, domain registry systems, and custom e-commerce experiences.
If you need a developer who thinks beyond the obvious and ships modern, high-performing products, I’m the partner you want.
- Age 28
- Residence Pärnu, Estonia
- Email karlerik@kreative.ee
- Phone (+372) 59 014 611
Who I've worked with
Pricing
Fun Facts
Average collab. length
2.5 yearsFull-time availability
Q2, 2026Freelanced since
2019Resume
Education
2016 -
Estonian IT CollegeBachelor's degree
IT systems development
2014 - 2016
Rapla GymnasiumHigh School
Additional courses about software development
Experience
2021 -
KlarVP of Engineering
Building an entire backbone of the e-commerce site using Ruby on Rails, bundled with GraphQL. Including connectors to MRP / ERP / Finance & Kubernetes infrastructure.
03.2021 - 12.2021
EasyParkSoftware Engineer
NBA/Marketing unit, mainly integrating Braze into customer journeys to enhance retention, using Java/Kotlin as a main programming language.
2019 - 2021
Estonian Internet FoundationRuby on Rails developer
Front- and backend development based on Ruby (on Rails) framework for Estonian .ee ccTLD registry.
2017 - 2019
Tallinn Univesity of TechnologySoftware Engineer
Ruby on Rails development for practical hands-on e-learning cyber platform.
Skills
Ruby (on Rails)
Dart / Flutter
Architecture design
Creativity
Knowledges
- Ruby
- Rails
- Dart
- Flutter
- Kubernetes
- AWS
- REST APIs
- GraphqQL
- PostgreSQL / MongoDB
- NextJS
- React
- GitLab CI/CD
- Cypress
- RSpec
- EPP
- DNSSEC
Certificates
