Олександр

16.09.2026, 13:40 Oleksandr Chernetskyi, React Frontend Developer

Senior React Frontend Developer building scalable SaaS applications using React, Next.js and
TypeScript. Focused on strong UI/UX, clean and maintainable code. Experienced in frontend
architecture, performance optimization, and mentoring developers, with a track record of delivering
AI-powered products in international, cross-functional teams. Comfortable owning features end-to-
end, from architecture decisions to final delivery.

WORK EXPERIENCE:

2020 Aug. - Present Mindnow
Senior React Frontend Developer

Led frontend architecture end-to-end for an AI-powered career
platform, from concept through production launch, driving key
technical decisions that shaped the product roadmap.
Oleksandr Chernetskyi Rearchitected the API integration layer with shared abstractions and
React Frontend Developer Tanstack Query, cutting frontend boilerplate by ~80% and speeding up
new feature delivery by ~30%.
Delivered production-ready, responsive features in React, Next.js, and
Remote
TypeScript, including SSR that boosted SEO performance by 60% and
LinkedIn ([відкрити контакти](див. вище в блоці «контактна інформація») raised the Lighthouse performance score from ~60 to 90+.
[відкрити контакти](див. вище в блоці «контактна інформація») Mentored mid-level frontend developers through code reviews,
[відкрити контакти](див. вище в блоці «контактна інформація») technical guidance, and internal tech talks, helping cut the team's
production bug rate by roughly 20%.
Cut page load times by ~40% and improved maintainability through
code splitting, lazy loading, bundle analysis, and dependency cleanup.
Built and maintained a multilingual platform supporting 12 languages,
contributing to an estimated 25% growth in the international user
base.
Owned frontend releases end-to-end and integrated Sentry for error
monitoring, cutting the time to detect and resolve production issues.
Worked in Scrum — took part in sprint planning and feature estimation,
and reviewed pull requests to keep code quality and delivery
predictable.
Collaborated closely with Product Managers, designers, and backend
engineers across a 10-person international team to ship complex
features while keeping release cycles fast.

2018 May. - 2020 Jul. Es.bet / KitCode / Gorilla (Kyiv)
React Frontend Developer

Built scalable React applications for gaming platforms end-to-end,
integrating REST APIs and managing state with MobX.
Redesigned key UI flows, boosting usability and engagement across
devices.
Shipped new features and optimized application performance, working
closely with design and backend.

2015 Oct. - 2018 May. Dreamscape Networks / Siteplus (Kyiv)
Frontend Developer

Built a flexible website-builder platform from the ground up at an
early-stage startup.
Created a full library of website templates, translating designs into
pixel-perfect UI.
Proposed and shipped feature improvements that shaped the product
roadmap.

SKILLS: TOOLS:

JavaScript, TypeScript, jQuery Figma, Adobe Photoshop
React.js, Next.js, MobX, Zustand, TanStack Codex AI, Cursor, Claude Code, Antigravity
Query, Redux, React Router Webstorm, VS Code
HTML5, CSS3 Git, GitHub, Bitbucket

localhost:3000 1/2

16.09.2026, 13:40 Oleksandr Chernetskyi, React Frontend Developer
SASS, SCSS, CSS Modules Vite, Webpack
Bootstrap, Tailwind CSS Linear, Jira
SEO, Semantic Markup, Responsive Design,
Performance Optimization
REST API, API Integration, Component LANGUAGES:
Design, Reusable Components
Node.js, Express, MongoDB, JWT (personal
project) Ukrainian
Cypress, Playwright Russian
Agile, Scrum, Code Review, Mentoring English (Professional working proficiency)

FULL-STACK EXPERIENCE:

Full-Stack Web Application — personal project
Built a full-stack web application from scratch, developing both the React frontend and a
complete Node.js/Express/MongoDB backend.
Designed and implemented backend logic, including REST API endpoints, database models, and
a full authentication system — registration, login, and forgot/reset password.
Handled the project end-to-end, from backend architecture and API design to frontend
integration.

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