Klemen Kastelic
Co-founder And Senior Software Engineer at Olaii
Ljubljana, Slovenia
Summary
👤
Senior🎓
Top SchoolKlemen Kastelic is a co-founder and senior software engineer with 11 years of hands-on experience building event and entertainment platforms from POS systems to ticketing and access control. He leads frontend development and UX design, shipping complex Vue and Angular(S) applications as well as native iOS apps, and has a pragmatic backend and hardware familiarity that helps bridge product and operations. Klemen’s work spans end-to-end features—management backoffices, web check-in tools, thermal printer integrations and cashless event systems—demonstrating an ability to design cohesive ecosystems rather than isolated apps. Based in Ljubljana, he combines entrepreneurial instincts with formal computer science training and a strong visual design sensibility (Figma/Sketch/Adobe), which often accelerates delivery and UX consistency across product families.
11 years of coding experience
4 years of employment as a software developer
Electrical engineering and computer science, Electrical engineering and computer science at Šolski center Novo mestoBachelor of Applied Science (BASc), Bachelor of Applied Science (BASc) at Univerza v Ljubljani
Slovenian, English
Stackoverflow
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Github Skills (184)
npm-package10
epson10
zpl10
printing10
pdf-document10
thermal-printer10
pdfkit10
zebra10
directive10
pcsc10
3d-printer10
fastest10
nodejs10
octoprint10
npm10
Programming languages (11)
Github contributions (5)
Klemen1337/node-thermal-printer
May 2015 - Oct 2022
Node.js module for Epson, Star, Tanca, Drauma and Brother thermal printers command line printing.
Contributions:6 releases, 4 reviews, 33 commits in 7 years 6 months
octoprintthermalthermal-printersnpm-packageescpos
Klemen1337/angularjs-nice-elements
May 2019 - Dec 2023
Nice elements is a collection of beautiful html elements.
Contributions:10 PRs, 87 pushes, 3 branches in 4 years 7 months
web-componentselementscssangularjshtml-elements
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