Viktor is available for hire
Hire ViktorViktor Vincze
Verified Expert in Engineering
Software Architect and Developer
Büdlich, Rhineland-Palatinate, Germany
Toptal member since March 22, 2022
Bio
Viktor is a skilled software architect with 10 years of expertise in front-end ecosystems. Since 2016, he has focused on creating superior React applications for high-traffic services using leading-edge solutions. As a professional committed to excellence, Viktor welcomes opportunities to work on projects where innovation aligns with stakeholder objectives. Over the past decade, he specialized in the front-end ecosystem. He is also comfortable working in full-stack environments.
Portfolio
DeSo
React, JavaScript, Front-end, Next.js, TypeScript, Web3.js, Tanstack Start, Go...
Pioneer Works, Inc.
React, Redux, Front-end, CSS, JavaScript, Jest, HTML, Ruby, Ruby on Rails (RoR)...
Gartner
React, Node.js, Storybook, Figma, Next.js, Front-end, GitHub...
Experience
- JavaScript - 15 years
- Node.js - 11 years
- React - 8 years
- Redux - 7 years
- CSS-in-JS - 7 years
- Next.js - 6 years
- Tailwind CSS - 4 years
- YouEye - 2 years
Work Experience
Front-end Engineer
2024 - 2026
DeSo
- Built and maintained the majority of Focus.xyz’s front end from an early stage, contributing across architecture, core features, design improvements, UX polish, and production stability.
- Evolved Focus.xyz’s initial Next.js architecture into a more scalable and maintainable front-end foundation for a complex decentralized social platform.
- Implemented a custom windowing system for a highly customized infinite-scroll feed, improving performance for content-heavy user timelines.
- Designed the front-end architecture for a confidential unreleased multi-platform product, including a modern monorepo structure for multiple desktop/mobile apps, shared libraries, unit tests, and E2E coverage.
- Established reusable front-end foundations across apps, enabling shared UX patterns, stronger code reuse, and a cleaner long-term development model.
Technologies: React, JavaScript, Front-end, Next.js, TypeScript, Web3.js, Tanstack Start, Go, Rust, Architecture, Authentication, Databases, Deployment, Full-stack Development, GraphQL API, JSON Web Tokens (JWT), PostgreSQL, Real-time Systems, WebSockets, DevOps, Claude, LLM Integration
Senior Front-end React Developer
2023 - 2023
Pioneer Works, Inc.
- Migrated several pages to a new Figma-based design system.
- Fixed TypeScript issues around basic UI components.
- Advised on general improvements of the entire codebase for long-term maintainability.
Technologies: React, Redux, Front-end, CSS, JavaScript, Jest, HTML, Ruby, Ruby on Rails (RoR), Architecture, Authentication, Deployment, Agile
React/Node.js Developer
2022 - 2023
Gartner
- Created a completely new in-house UI component library that unifies several different brands or projects from a single codebase.
- Wrote a fully automated codemod that helps different projects migrate to the new UI library. It does 98% of the work that otherwise would take months.
- Built a Monaco Editor-based online playground that lets developers play with components in real-time on their browser, helping them reproduce issues and supporting them with the ability to share their creations.
- Successfully investigated performance issues in the AWS Lambda-based rendering pipeline.
- Implemented theming using design tokens for five different projects.
Technologies: React, Node.js, Storybook, Figma, Next.js, Front-end, GitHub, User Interface (UI), TypeScript, Amazon Web Services (AWS), Full-stack, Webpack, Vite, Jest, Testing, CSS3, Data Visualization, Tailwind CSS, Front-end Development, CI/CD Pipelines, CSS, SEO Tools, SCSS, Software Engineering, Architecture, Authentication, DevOps, Agile
Front-end Software Architect
2018 - 2022
Docler Holding SARL - Luxembourg
- Created in-house developer tools and design systems.
- Introduced modern architectural solutions and changes to old and new systems.
- Initiated a shared interoperable component ecosystem across codebases with different stacks.
- Used custom tools and leveraged pre-built Docker images to improve a CI/CD pipeline.
- Participated in research and development tasks driven by new initiatives.
- Defined global, company-wide standards for front-end developers.
- Concluded over 100 interviews with positive feedback from candidates about the process.
- Built an internal portal for front-end developers—featuring the latest news, a package browser with documentation, changelog history, and a Storybook playground—and an online version of our front-end cookbook.
Technologies: JavaScript, Node.js, PHP, Docker, React, Backbone.js, Riot.js, GraphQL, React Apollo, Redux, Webpack, Storybook, Interviewing, Front-end, GitHub, User Interface (UI), TypeScript, Amazon Web Services (AWS), Full-stack, HTML, CSS, Linux, Bash, MySQL, Jest, Enzyme, Cypress, CSS3, Data Visualization, Tailwind CSS, Next.js, Front-end Development, CI/CD Pipelines, SEO Tools, SCSS, Software Engineering, Azure, Architecture, Authentication, Databases, Deployment, Full-stack Development, GraphQL API, JSON Web Tokens (JWT), Real-time Systems, WebSockets, DevOps, Agile
Senior Front-end Developer
2017 - 2018
Docler Holding - Amsterdam
- Participated in research and development tasks driven by new initiatives.
- Developed a custom, in-house test automation suite.
- Helped establish operations for a new office in a new country for the company.
- Developed a complex, JSON-based form solution that took care of form generation for the client and validation on both back-end and client side.
- Joined the local R&D team, where we defined company-wide standards.
- Delivered an in-house test automation suite for the company's QA engineers, where they could run, schedule, edit, and analyze test results in a single place for several different projects and testing solutions.
Technologies: JavaScript, Node.js, PHP, Docker, React, Backbone.js, Riot.js, GraphQL, React Apollo, Redux, Webpack, Storybook, Interviewing, Front-end, GitHub, User Interface (UI), TypeScript, Full-stack, Jest, Enzyme, HTML, CSS, CSS3, Data Visualization, Front-end Development, CI/CD Pipelines, SEO Tools, SCSS, Software Engineering, Azure, Architecture, DevOps, Agile
Senior Front-end Developer
2014 - 2017
Docler Holding SARL - Luxembourg
- Worked on the multi-tenant administration interface designed for the company's models, called ModelCenter.
- Introduced advanced styling solutions that aligned with the ever-growing complexity of ModelCenter.
- Created a responsive, mobile-optimized version of ModelCenter.
- Introduced a modern, client-side templating solution.
- Led the front-end department of the team with 4-6 developers.
- Developed an in-house icon management solution for all the projects.
Technologies: Adobe Photoshop, JavaScript, Adobe Illustrator, SVG, Jest, Enzyme, HTML, CSS, PHP, MySQL, React, Backbone.js, Marionette.js, Riot.js, Ext JS, React Apollo, GraphQL, Storybook, Interviewing, Redux, Webpack, Front-end, GitHub, User Interface (UI), TypeScript, Full-stack, Linux, Bash, Polymer, Web Components, CSS3, Data Visualization, Front-end Development, CI/CD Pipelines, SEO Tools, SCSS, Software Engineering, Architecture, DevOps, Agile
Specialist Front-end Developer
2013 - 2014
Docler Holding - Budapest
- Joined the team and cleared up 100+ front-end bug tickets from the project's backlog in my first week.
- Implemented new features and design changes on a legacy project.
- Introduced performance improvements by modernizing the front-end stack and development environments.
Technologies: JavaScript, PHP, HTML, CSS, Adobe Photoshop, jQuery, Ext JS, Linux, Bash, MySQL, Subversion (SVN), CSS3, Front-end Development, CI/CD Pipelines, SEO Tools, SCSS, Software Engineering, Architecture, DevOps, Agile
Chief Executive Officer (CEO) | Chief Technical Officer (CTO)
2008 - 2013
DarkTech Labs Kft.
- Created Hungary's Top 10 most visited website with over 1.1 million registered users and 250,000 daily visitors in the country with two million people with internet access at the time.
- Used a self-made PHP and MySQL framework, a content management system (CMS), and ExpressionEngine (EE) with a jQuery-based, fully Ajax, SPA front end considered cutting-edge at the time.
- Provided privately managed web-hosting solutions for clients.
Technologies: JavaScript, PHP, ExpressionEngine, MySQL, jQuery, Ajax, Front-end, User Interface (UI), Full-stack, CSS3, Front-end Development, CI/CD Pipelines, CSS, SEO Tools, Software Engineering, Architecture, Authentication, Databases, Deployment, Full-stack Development, DevOps
Full-stack Developer
2004 - 2013
Freelancer
- Worked as a self-employed contractor alongside my business projects building custom websites or redesigning websites.
- Developed and maintained products for the Envato marketplaces, HTML and WordPress templates for ThemeForest, WordPress plugins, PHP scripts, and jQuery plugins for CodeCanyon.
- Provided consultations, review services, and technical analyses for companies' third-party software deliveries.
Technologies: JavaScript, PHP, Linux, MySQL, Front-end, User Interface (UI), Full-stack, CSS3, Front-end Development, CSS, SEO Tools, Software Engineering, Architecture, Authentication, Databases, Deployment, Full-stack Development, DevOps
Full-stack Engineer
2006 - 2009
MadeUnder Media Kft.
- Developed and maintained forum-engine-based applications with custom theming and functionalities.
- Performed system administrator responsibilities, overseeing the management of HTTP, MySQL, email, and load-balancing servers.
- Implemented Photoshop-based designs for the community portals.
Technologies: JavaScript, PHP, HTML, CSS, Linux, Bash, Adobe Photoshop, vBulletin, InVision, MySQL, MySQL Server, CSS3, Front-end Development, Software Engineering, Architecture, Authentication, Databases, Deployment, Full-stack Development, DevOps
Experience
DNBOP.com
https://dnbop.comA Next.js-based web app based on my own Spotify playlist collection. I created it only for fun. I wanted to play around with Next.js's built-in fetch cache feature. The source code is freely available on GitHub.
Stormbreaker
https://stormbreaker.gdmlabs.dev/docs/latest/index.htmlI helped build a standardized framework-agnostic UI library shared across projects and supported the migration by making automated tools and code mods. The library also provides a React-based implementation for consumers.
Collaborating closely with designers, we delivered a UI pipeline that can automatically synchronize with a Figma-defined design system.
Collaborating closely with designers, we delivered a UI pipeline that can automatically synchronize with a Figma-defined design system.
LiveJasmin
https://livejasmin.comLiveJasmin is a leading adult streaming service worldwide. Working here for the last nine years led me to participate in several subprojects besides the company's flagship product, such as Model Center, Docler Mainstream, Jasmin, Whitelabel projects, and Adult Webmaster Empire.
YouEye
https://youeye.devYouEye is a single-component UI toolbox for React that leverages prop-based styling and static and dynamic extraction using Babel. It also eliminates many problems or friction that traditional CSS or Sass solutions suffer from.
Mhy Toolbox and Development Environment
https://mhy.js.orgAs a zero-config, out-of-the-box, multi-purpose toolbox and development environment, mhy is my "Swiss army knife" for everyday development. I incorporated all my day-to-day tools in one global package to avoid bootstrapping and setups and save some disk space from node_modules. It makes webpack, Babel, SWC, Jest, and Storybook work with the same out-of-the-box configuration.
CrypticCSS
https://ccss.devCCSS is a simple CSS object toolbox that adds shorthand support for the complete CSS specification. It can declare custom props and value maps for any property, making it a perfect weapon to deliver customizable design systems and CSS-in-JS solutions. YouEye was built using CCSS.
Stormbreaker - React-based UI Pipeline for a Shared Ecosystem
https://stormbreaker.gdmlabs.dev/docs/latest/index.htmlA comprehensive solution for a multi-brand UI library, supporting automatic synchronization with Figma-based design tokens. The library provides a React-based implementation of the components as a reference and technically supports any framework/stack.
Education
2011 - 2013
Certification in Web Developer
LIA School - Budapest, Hungary
2009 - 2011
Coursework Toward Bachelor’s Degree in Mathematics and Computer Science
University of Pecs - Pecs, Hungary
Skills
Libraries/APIs
React, Node.js, jQuery, Riot.js, REST APIs, GraphQL API, Backbone.js, Marionette.js, Polymer, Spotify API, Linaria, Web3.js
Tools
IntelliJ IDEA, Webpack, Babel, Claude, React Apollo, Git, Adobe Photoshop, NGINX, Atlassian Suite, GitHub, Adobe Illustrator, Expo, Lerna, Figma, Subversion (SVN), InVision, Style Dictionary
Languages
JavaScript, Sass, TypeScript, CSS, HTML, CSS3, SCSS, PHP, GraphQL, SQL, TypeScript 3, Bash, C++, Ruby, Go, Rust
Frameworks
Redux, Next.js, Tailwind CSS, React Native, Express.js, Jest, JSON Web Tokens (JWT), Ext JS, Cypress, Ruby on Rails (RoR)
Paradigms
Continuous Integration (CI), Continuous Deployment, Real-time Systems, Agile, DevOps, Testing
Platforms
Windows, YouEye, Docker, Linux, Amazon Web Services (AWS), vBulletin, Vercel, Azure
Storage
MySQL, Redis, Elasticsearch, Databases, MySQL Server, PostgreSQL
Other
ExpressionEngine, Ajax, Storybook, Interviewing, CSS-in-JS, CCSS, Server-side Rendering (SSR), Progressive Web Applications (PWAs), Responsive Design, Design Systems, Front-end, User Interface (UI), Full-stack, Front-end Development, CI/CD Pipelines, Software Engineering, Architecture, Authentication, Deployment, Full-stack Development, WebSockets, Web Components, Speedy Web Compiler (SWC), SEO Tools, LLM Integration, Enzyme, Cordova, PWA, Bun, Mathematics, Web Development, SVG, Vite, Data Visualization, Turborepo, Tanstack Start
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