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Oleksandr Berezhnyi
Front-end Developer
Dnipro, Ukraine | [открыть контакты](см. выше в блоке «контактная информация») | [открыть контакты](см. выше в блоке «контактная информация») | LinkedIn: olexandr-berezhnyi | Telegram: zhvaninh0

Summary
Result-oriented Front-end Developer with 5 years of experience building scalable React applications. Strong background in
collaborating with cross-functional teams and translating design mockups into performant, accessible, and responsive user
interfaces.

Skills
English (B2), JavaScript (ES6+), React (hooks & classes), TypeScript, Next.js (basic), React Native (basic), HTML5, CSS3,
SASS, Tailwind CSS, Styled Components, Material UI, Ant Design, shadcn/ui, React Router, Redux Toolkit (Saga, Thunk), RTK
Query, Tanstack Query, Zustand, React Context, REST API, GraphQL/Apollo(basic), WebSockets, Git
(GitHub/GitLab/Bitbucket), Webpack / Vite, performance optimization, accessibility (WCAG), responsive & adaptive design,
cross-browser compatibility, design patterns, SOLID, unit testing (Jest, React Testing Library - basics).

Experience
Cody Solutions — Middle Front-end Developer · Jul 2025 – Present
• Implemented broker app from scratch, using AI
• Built form generator for an internal banking application
• Implemented accessibility-compliant UI features (screen reader compatibility, scroll behavior fixes, keyboard navigation)
Tech: React (hooks), TypeScript, React Context, Ant Design, SASS, shadcn/ui, React Hooks Form, zod, Tanstack Query,
Zustand, axios, Recharts

GBSFO — Middle Front-end Developer · May 2023 – Jul 2024 (15 months)
• Collaborated in a team of 6 front-end developers, led refactoring reviews and introduced code quality standards
• Migrated legacy class-based React + Redux Saga codebase to modern React hooks, TypeScript and RTK
• Co-designed new REST API contract with back-end team for improved data flow and maintainability
• Optimized large datasets by moving grid operations (pagination, filtering, sorting) fully to the server
Tech: React, TypeScript, Redux Toolkit, Redux Saga, Material UI, REST API

Hygge Software — Middle Front-end Developer · Mar 2021 – Jan 2023 (23 months)
• Conducted technical interviews for junior React/React Native candidates
• Maintained and improved a B2B vehicle marketplace (React class components, Redux-Saga, Styled Components, React Intl)
in a 3–6 dev team for 13+ months
• Built B2B construction marketplace MVP from scratch (React, Redux Thunk, Apollo Client, multi-step auth, responsive
tables/layouts) and fully owned the front-end delivery process
• Assisted with React Native mobile apps — implemented bug fixes, Firebase notifications, handled App Store submission
Tech: React, TypeScript, Redux Saga/Thunk, Styled Components, React Hook Form, React Native, REST API, Apollo Client

Atilogsoft — Junior Front-end Developer · Jun 2020 – Feb 2021 (9 months)
• Built MVP React Native app for snow-clearing service with geolocation and custom timers
• Improved performance and fixed audio player issues in animation player app (React hooks, Redux, SASS)
• Assisted in developing chat functionality for mobile application
• Participated in internal technical interviews (attestation process)
Tech: React (hooks), React Native, Redux, Redux Saga/Thunk, SASS, Formik Rambda

Flow AI — Junior JavaScript Developer · Oct 2019 – Jun 2020 (9 months)
• Delivered pixel-perfect UI from Figma designs for chat platform and microservices
• Worked on chat bot builder with 100+ microservices (React, Redux-Saga, Aphrodite) and assisted with basic Node.js tasks
Tech: React (classes), Redux, Redux-Saga, aphrodite (CSS-in-JS), Redux-Form, Node.js, Express, MongoDB

Education
EUNU Sievierodonetsk - 2017 - Master Degree (System Programming)