Oleh Dufenyuk

Available to hire

js, and TypeScript. I focus on clean, scalable UI architecture, performance, accessibility, and maintainable component systems.

About

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.

  • Joined February 2026

Languages

  • UkrainianFluent
  • EnglishFluent
  • RussianFluent

Industry experience

  • Media & Entertainment
  • Software & Internet
  • Professional Services

More experts in London, United Kingdom

Projects · 2

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.

Technic Labs – Service Business Website
  • Front-End Developer

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.

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

Work experience· 6 roles

Front-End Developer · Independent Project · Self-EmployedNov 2024 – Present · 2 yrs 1 mo

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.

Front-End Developer · CV Library LtdJan 2024 – Oct 2024 · 10 mos

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 · TVG Media Ltd (The Pixel)Sep 2021 – Apr 2023 · 1 yr 8 mos

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 · Cognizant LtdApr 2021 – Jul 2021 · 4 mos
Front-End Developer · Ascential plcSep 2016 – Jun 2020 · 3 yrs 10 mos
Front-End Developer · Supersonic Playground LtdApr 2016 – Aug 2016 · 5 mos

Education

Diploma in Graphic Design · London Art College2007 – 2008

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