alexbtc
Senior Frontend Developer
Front-End developer with 10+ years of commercial experience, working in teams ranging from 2 to 35 members,
as well as independently—both remotely and on-site. Mentored 4 developers for 1.5 years. Implemented full
development lifecycle: from gathering product requirements to establishing fully automated release process
with high test coverage, detailed analytics, and CI/CD. Expert in: developing component libraries, performance
optimization, technical debt managing, upgrading core dependencies (React and React Native), refactoring,
responsive/adaptive design, quality assurance, business processes optimization.
Experience: 11 years
Yearly salary: $0
Hourly rate: $0
Nationality: 🇺🇦 Ukraine
Residency: 🇵🇱 Poland
Experience
Improved messenger performance
Status 2023 - 2024
Improved messenger performance from 40 to 60 FPS, enhancing user experience with verified positive feedback. Reduced component library defects by 13% through systematic refactoring. Decreased initial bundle size by 4% through asset optimization. Improved codebase maintainability score from 65 to 88 through strategic refactoring. Implemented pixel perfect designs across iOS and Android platforms. Learned Clojure in 2 weeks, delivering production features immediately after.
Mentored developers
Cargurus 2021 - 2023
Mentored 3 junior and 1 middle developers, resulting in 40% team velocity increase. Established bi-weekly knowledge sharing sessions, improving team expertise by 20%. Implemented design system, reducing UI inconsistencies by 10%. Improved codebase maintainability score from 43.3 to 61 through targeted refactoring. Increased user satisfaction rate from 82% to 90% through accessibility improvements. Reduced boilerplate code by 11% through Redux to React Query migration.
Skills
aws
firebase
graphql
mobile
react
react-native
typescript
ui-ux-designer
front-end
english