Mark Cornelissen
Senior Software Engineer at Hunter.io
Almere, Flevoland, Netherlands
Summary
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SeniorMark Cornelissen is a seasoned Senior Software Engineer with 15 years of experience building dependable web applications and integrating systems across languages like Ruby, PHP, Java, and C#. Currently at Hunter.io, he focuses on Ruby/Rails application design and delivery while bringing a history of technical leadership and hands-on development from roles as Lead Developer and Technical Architect. Mark has a practical streak for improving user-facing reliability—evident in his open-source work on a microblogging project where he enhanced authentication, session handling and duplicate-post protection. Based in Almere, Netherlands, he enjoys exploring new platforms and consistently ships high-quality, maintainable software. Colleagues know him for balancing pragmatic engineering with a curiosity for emerging technologies.
16 years of coding experience
20 years of employment as a software developer
Dutch, English
Stackoverflow
1,058reputation
86kreached
19answers
0questions
capybara
top-5%
Github Skills (20)
unit-testing10
session-management10
testing10
user-authentication10
authentication10
acceptance-testing10
ruby10
rack10
test-unit10
capybara9
sinatra9
rest-api8
api-rest8
restful-api8
api-design8
Programming languages (6)
Github contributions (5)
hotsh/rstat.us
Apr 2011 - Feb 2012
Simple microblogging network based on the ostatus protocol.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:16 commits in 10 months
Contributions summary:Mark primarily focused on enhancing the authentication and session management aspects of the microblogging application. They implemented a "remember me" feature, extending session handling with cookie expiry customizations and case-insensitive username login. Furthermore, the user addressed duplicate posts, ensuring content integrity and improved user experience within the feed. They also contributed to logging capabilities and overall application improvements.
ostatus
mrkcor/echo
Aug 2012 - Oct 2020
Echo
Contributions:4 commits, 16 pushes, 1 branch in 8 years 4 months
echo
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