Michael Koper
Founder at NUSII PROPOSALS SL
Madrid, Community of Madrid, Spain
Summary
👤
Senior🎓
Top SchoolMichael Koper is a Ruby on Rails specialist and entrepreneur with 16 years of experience building web products and the founder of Nusii, an online proposal service for creatives. He cut his teeth as Cabify’s first hire, owning critical web systems from real-time fleet monitoring to CMS-driven landing pages, and has deep hands-on experience across backend stacks including Redis, PostgreSQL, CouchDB and Node.js. A pragmatic test-driven developer versed in RSpec and Cucumber, he combines product-focused engineering with startup leadership, shipping reliable UIs and admin tools since 2008. Based in Madrid and educated in software engineering in Amsterdam, he brings both SaaS founder instincts and long-term Rails craftsmanship to early-stage product and platform challenges.
16 years of coding experience
5 years of employment as a software developer
Bachelor Informatica Software Engineer, Bachelor Informatica Software Engineer at Amsterdam University of Applied SciencesMid Sweden University
Dutch, English, Spanish
Stackoverflow
9,711reputation
1.4mreached
95answers
39questions
mysql
top-5%
controller
top-5%
ruby
top-5%
ruby-on-rails
top-5%
textarea
top-5%
validation
top-1%
Github Skills (88)
html-editor10
wysiwyg10
ruby-on-rails10
validation10
froala10
multistep10
rich-text-editor10
rubygems9
factories9
javascript9
testing9
controller9
ruby9
textarea9
newline9
Programming languages (6)
Github contributions (5)
michaelkoper/dotfiles
Dec 2020 - Feb 2026
config files for zsh, bash, completions, gem, git, irb, rails, vim
Contributions:17 pushes in 5 years 2 months
irbzshrcvimrailscompletions
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