Oleh Korniienko
Senior Software Engineer at Deepnote
Warsaw, Masovian Voivodeship, Poland
Summary
👤
Senior🎓
Top SchoolOleh Korniienko is a seasoned software engineer with 11 years of experience, currently focused on frontend development with React while blending backend expertise in Python and FastAPI. He has deep knowledge of browser internals and a strong track record building complex, high-quality browser extensions used across Chrome and Firefox—contributing notable UX improvements to popular projects like toolkit-for-ynab. His work spans scaling backend scrapers to thousands of parallel jobs, migrating large codebases to TypeScript, and shipping charting and data features that handle millions of records. Comfortable owning full-stack delivery, deployment and observability, he routinely configures Docker-based deployments with Prometheus, Loki and Grafana for production reliability. Based in Warsaw, he brings a pragmatic focus on performant code and delightful user experiences, plus a knack for quickly onboarding and improving legacy systems.
11 years of coding experience
6 years of employment as a software developer
Junior Specialist, Computer Software Engineering, Junior Specialist, Computer Software Engineering at College of Computer Technology & Economic of NAUBachelor's degree, Cybersecurity, Bachelor's degree, Cybersecurity at State University of Telecommunication
English, Ukrainian, Slovak, Polish
Stackoverflow
1,051reputation
12kreached
41answers
4questions
Github Skills (21)
javascript10
chrome-extension10
google-chrome-extension10
na10
react10
firefox-webextension9
user-interface9
firefox-addon9
css9
webextension9
markdown-it8
markdown8
monetary7
html7
iframe6
Programming languages (12)
Github contributions (5)
toolkit-for-ynab/toolkit-for-ynab
Sep 2018 - Nov 2021
A general purpose YNAB enhancing browser extension for Chrome and Firefox. Have it your way!
Role in this project:
Front-end Developer
Front-end DeveloperContributions:5 reviews, 12 commits, 44 PRs in 3 years 2 months
Contributions summary:Oleh primarily contributed to the front-end of the YNAB extension by implementing new features and fixing existing issues. Their work included adding a category filtering feature, incorporating markdown support for transaction memos, and enhancing the display of reports such as the income vs expense report. The user also made adjustments to the UI of the options page and added new functionalities, such as the "Automatically mark as cleared" feature, indicating a strong focus on improving user experience.
firefoxbrowserynabenhancingchrome
OlegWock/inject-react-anywhere
Jul 2022 - Jul 2022
Contributions:21 commits, 24 pushes, 1 branch in 17 days
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.