David Vrensk
Chief Technology Officer at Ealyx
Gijón, Asturias, Spain
Summary
👤
Senior🎓
Top SchoolDavid Vrensk is a pragmatic CTO and systems builder with 18 years of experience founding and scaling fintech and SaaS products across Europe, Africa and the US. He combines hands-on engineering (Ruby/Rails, Elixir, Postgres) with product-minded architecture, having gone from MVP coding to hiring and shaping engineering cultures that practice TDD, pair programming and high reliability. As technical co-founder of SeQura and interim CTO at multiple fast-growth companies, he has delivered mission-critical payment and data systems, accounting pipelines and high-throughput real-time services. He’s also contributed to notable open-source tooling in the Ruby ecosystem (including practical enhancements to the ROTP one-time-password library). Based in Gijón, Spain, David tends to focus on measurable impact and durable systems—prefering clear why-to-connect reasons when meeting new collaborators. Colleagues describe him as entrepreneurial, detail-oriented, and unusually experienced at turning operational needs into testable, documentable systems.
17 years of coding experience
19 years of employment as a software developer
Russian, Russian at Swedish Armed Forces Language SchoolMS (incomplete) Computational Linguistics, MS (incomplete) Computational Linguistics at University of Gothenburg
English, Swedish, Spanish, French, German, Russian, Estonian, Catalan
Stackoverflow
41reputation
1kreached
1answer
0questions
Github Skills (4)
testing10
ruby10
mysql6
ruby-on-rails6
Programming languages (8)
Github contributions (5)
mdp/rotp
May 2012 - May 2012
Ruby One Time Password library
Role in this project:
Back-end Developer & QA Engineer
Back-end Developer & QA EngineerContributions:6 commits in 2 days
Contributions summary:David primarily focused on bug fixes and enhancements related to the `verify` functionality within the ROTP library. Their contributions include making the `verify` method accept a string input in addition to the numeric input. They also added the `verify_with_drift` method to TOTP, enabling verification of OTPs within a certain time drift, and corrected a bug regarding the accuracy of this method. Additionally, they improved unit tests.
one-time-passwordrailsrubyone-timepassword
sequra/chat-with-rails5
Feb 2016 - May 2020
Contributions:4 pushes, 6 branches, 1 tag in 4 years 3 months
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