Front-End Developer with 5+ years of experience building modern, production-ready web applications using React, Next.js, and TypeScript. I focus on clean, scalable UI architecture, performance, accessibility, and maintainable component systems. Alongside frontend development, I implement the backend integrations needed to support end-to-end features — including Supabase, API routes, database operations, and authentication flows. I’m comfortable working across the full application stack when required, while keeping frontend quality and user experience as the priority.…

Oleh Dufenyuk

Front-End Developer with 5+ years of experience building modern, production-ready web applications using React, Next.js, and TypeScript. I focus on clean, scalable UI architecture, performance, accessibility, and maintainable component systems. Alongside frontend development, I implement the backend integrations needed to support end-to-end features — including Supabase, API routes, database operations, and authentication flows. I’m comfortable working across the full application stack when required, while keeping frontend quality and user experience as the priority.…

Available to hire

Front-End Developer with 5+ years of experience building modern, production-ready web applications using React, Next.js, and TypeScript. I focus on clean, scalable UI architecture, performance, accessibility, and maintainable component systems.

Alongside frontend development, I implement the backend integrations needed to support end-to-end features — including Supabase, API routes, database operations, and authentication flows. I’m comfortable working across the full application stack when required, while keeping frontend quality and user experience as the priority.

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Skills

Experience Level

JavaScript
Expert
Github
Expert
CSS
Expert
TypeScript
Intermediate
Tailwind
Intermediate
Jira
Intermediate
GraphQL
Intermediate
PostgreSQL
Intermediate

Language

Ukrainian
Fluent
English
Fluent
Russian
Fluent

Work Experience

Front-End Developer at CV Library Ltd
January 1, 2024 - October 30, 2024
Delivered scalable, component-based UIs using React and Next.js within a mono-repo architecture, collaborating closely with design and backend teams. Modernised legacy admin tools with self-service features, reducing developer dependency and lowering operational costs. Integrated analytics, feature flagging, and third-party services to support experimentation and improve user engagement. Contributed to testing, code reviews, UAT sessions, and cross-team knowledge sharing to ensure reliable delivery.
Front-End Developer at TVG Media Ltd (The Pixel)
September 1, 2021 - April 30, 2023
Led frontend redevelopment for a client-facing e-commerce site using Magento PWA Venia Studio and React; built new components, redesigned existing ones, and ensured a consistent front-end experience; fixed UI bugs and implemented feature enhancements; collaborated with clients and team to align with business goals; automated Jira reporting with Google Apps Script.
Front-End Developer at Cognizant Ltd
April 1, 2021 - July 31, 2021
Supported frontend teams across multiple projects by populating content via Contentful CMS, fixing UI bugs, and aiding in rebranding; contributed to user-facing features with React components and maintained consistency across layouts; utilized HTML, CSS, JavaScript, SASS, and Git; worked in Agile environments.
Front-End Developer at Ascential plc
September 1, 2016 - June 30, 2020
Contributed to frontend development for major global event brands; supported transition to React by developing and maintaining shared component libraries (Gatsby.js, modern JavaScript); participated in rebranding legacy non-React sites; implemented automated testing with Jest and Enzyme; collaborated with Contentful CMS for React-based marketing sites.
Front-End Developer at Supersonic Playground Ltd
April 1, 2016 - August 31, 2016
Worked on multiple client projects, handling frontend development and WordPress-based backend tasks; built responsive websites and customized WordPress themes; gained practical experience with HTML, CSS, JavaScript, and CMS-based delivery.
Front-End Developer at Independent Project · Self-Employed
November 1, 2024 - Present
Designing and building a production-ready web application with Next.js, React, and TypeScript. Leading scalable UI architecture, performance optimisation, accessibility standards, and Supabase integrations for authentication, data management, and API-driven workflows.

Education

Diploma in Graphic Design at London Art College
January 1, 2007 - December 31, 2008

Qualifications

Add your qualifications or awards here.

Industry Experience

Media & Entertainment, Software & Internet, Professional Services
    paper Technic Labs – Service Business Website

    Developed a modern, high-converting website for a local IT support and computer repair business. The goal was to create a clean, professional online presence that clearly presents services and drives customer enquiries.

    The website was built using Next.js with a focus on performance, SEO structure, and responsive design. A proven layout was used to ensure clarity and strong conversion, including sections for services, reviews, and contact.

    Optional integrations include CMS for easy content updates and analytics tools to track user behaviour and improve performance over time.

    paper Full-Stack Booking Web Application – Next.js & Supabase

    Frontend-first web application built with Next.js, React, and TypeScript for a service-based business. Architected with scalable component structure, clean UI patterns, and performance-focused implementation to support long-term maintainability.

    Features include booking management, admin dashboard functionality, and backend integrations using Supabase for data storage, authentication, and API-driven workflows. Currently in active development, with payment processing and scheduling flows being integrated.

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