Lesha Kostiuchenko
Front-end Engineer at Ataccama
Prague, Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolLesha Kostiuchenko is a Front-end Engineer with 11 years of experience, currently building user-facing systems at Ataccama from Prague. He is a seasoned JavaScript developer and co-author of the widely used date-fns library, where he implemented and tested numerous date utilities such as compareAsc/Desc, addHours/subHours, parse and isSameDay. Lesha combines pragmatic front-end engineering with a strong open-source mindset, contributing bug fixes and nuanced behavior improvements like am/pm formatting. His background in computer science from Omsk State University underpins a methodical approach to building reliable, well-tested utilities and interfaces. Colleagues value him for shipping maintainable code that balances developer ergonomics with production reliability.
11 years of coding experience
Bachelor’s Degree, Computer Science, Bachelor’s Degree, Computer Science at Omsk State University (OSU)
English, Russian
Github Skills (5)
unit-testing10
typescript10
javascript10
typescripts10
typescript-types10
Programming languages (3)
Github contributions (5)
date-fns/date-fns
Jan 2015 - Dec 2022
⏳ Modern JavaScript date utility library ⌛️
Role in this project:
Back-end Developer
Back-end DeveloperContributions:10 releases, 75 reviews, 616 commits in 7 years 11 months
Contributions summary:Lesha primarily focused on implementing functions for the date-fns JavaScript utility library. Their contributions involved the addition of several new functions such as `compareAsc`, `compareDesc`, `addHours`, `subHours`, `isSameDay`, and `parse`. These functions were tested by the user. The user's work included a fix for the formatting of am/pm times.
javascript-datejavascriptutilitiesnodejsdate-fns
tessereact/tessereact
Aug 2017 - Nov 2018
Presentational snapshot testing for React (HTML, CSS, Screenshots)
Contributions:168 commits, 78 PRs, 135 pushes in 1 year 4 months
cssreactsnapshot-testing
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