Denys Kozak
Software Developer at Lefe.dev
Lviv, Lviv Oblast, Ukraine
Summary
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Rockstar🎓
Top SchoolDenys Kozak is a software developer with 11 years of experience building front-end systems and user-facing tooling from startups to product teams, currently based in Lviv, Ukraine. He has led front-end teams and delivered complex interfaces for crypto trading, task-integration platforms, and privacy-focused networks, and recently worked on stylized QR code generation using AWS. Comfortable shipping production features, he has modernized libraries by adding TypeScript, unit tests, and download/export capabilities to open-source QR tooling. With a foundation in computer science and a master's focus in artificial intelligence, Denys blends practical engineering with an interest in reliability and maintainability that surfaces in both product work and OSS contributions.
11 years of coding experience
9 years of employment as a software developer
Master's degree Artificial Intelligence, Master's degree Artificial Intelligence at Lviv Polytechnic National UniversityHigh School Diploma Physics and mathematics, High School Diploma Physics and mathematics at Lviv Physics and Mathematics Lyceum
English, Ukrainian
Stackoverflow
527reputation
32kreached
9answers
3questions
Github Skills (18)
code-generator10
javascript10
typescript10
codegen10
code-generation10
front-end-development10
jestjs10
typescript-types10
typescripts10
qr-code10
testing9
html6
react6
ecmascript6
firefox6
Programming languages (3)
Github contributions (5)
kozakdenys/qr-code-styling
Aug 2019 - May 2021
Automaticly generate your styled QR code in your web app.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:6 releases, 49 commits, 102 PRs in 1 year 9 months
Contributions summary:Denys primarily focused on enhancing the functionality and maintainability of the QR code styling library. They introduced TypeScript support by covering all files with TS. They added unit tests using Jest for improved code quality. Additionally, they implemented the basic download functionality, enabling users to save generated QR codes in different formats.
qrcodetypescriptstyledqr-code
kozakdenys/qr-code-styling-site
Sep 2019 - Jan 2021
Contributions:23 commits, 7 PRs, 34 pushes in 1 year 3 months
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