Petr Sergeev
Chief Executive Officer at Guardarian
Oslo, Norway
Summary
👤
Senior🎓
Top SchoolPetr Sergeev is a seasoned technology and payments executive with 14 years of experience building businesses, products, and teams from the ground up across Oslo and international markets. As CEO of multiple ventures including Guardarian, Finexta FZE, and AloTech FZE, he combines hands-on product and project management with deep technical, legal, and commercial expertise in payment systems. He has a proven track record of taking startups from inception to commercial success while scaling operational units and strategic partnerships. A former back-end contributor to the Ruby file-upload ecosystem (refile), he brings practical engineering insight into robustness and error handling alongside executive leadership. Trained as an engineer at Saint Petersburg State Electrotechnical University, he’s equally comfortable defining high-level business strategy and diving into code-level reliability improvements.
14 years of coding experience
Saint Petersburg State Electrotechnical University "LETI"
Stackoverflow
84reputation
2kreached
6answers
1question
Github Skills (13)
error-handling10
file-upload10
ruby10
testing9
heroku6
html6
php6
javascript6
formtastic6
forms6
has-many6
activeadmin6
ruby-on-rails6
Programming languages (4)
Github contributions (5)
refile/refile
Jun 2015 - Feb 2016
Ruby file uploads, take 3
Role in this project:
Back-end Developer
Back-end DeveloperContributions:5 commits, 3 PRs, 9 comments in 8 months
Contributions summary:Petr focused on improving error handling and robustness within the Refile file upload system. They addressed potential issues by handling exceptions related to file size validation and unexpected upload errors. Further, they added exception handling for invalid file types and cleaned up existing code. The user also made a change to the method of escaping filenames.
rubyfile-uploads
hyperoslo/activeadmin_polymorphic
Feb 2015 - Dec 2016
Contributions:20 commits, 12 PRs, 19 pushes in 1 year 10 months
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