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Oleksandr MezhenskyiOM

Oleksandr Mezhenskyi

Senior Frontend Developer · Vue · React · TS

€600/day
Crailsheim, DE
8-15 years

Average response time: 1 hour

About Oleksandr

Senior Frontend Developer with over 7 years of experience delivering robust, scalable, and user-centric web applications. I specialize in Vue.js (Vue 2/3), React, and TypeScript, and have built complex frontends for blockchain platforms, fintech applications, SaaS tools, and e-commerce systems.

I'm passionate about building clean, maintainable code and intuitive interfaces. I have successfully transitioned legacy codebases to modern frameworks, improved performance, implemented automated tests (Jest, Cypress), and optimized build tools (Vite, Webpack).

🔹 Strong in UI architecture, modular design, and state management (Vuex, Pinia, Redux)
🔹 Hands-on experience with SSR (Nuxt), Tailwind, SCSS, Ant Design, Vuetify
🔹 Remote collaboration with teams in USA, and Europe
🔹 B1 German · Fluent English · Based in Germany (Crailsheim), open to remote or hybrid work

Looking forward to helping your team deliver elegant and reliable frontend solutions.
  • Ukrainian

    Native or bilingual

  • English

    Fluent

  • German

    Conversational

  • Russian

    Native or bilingual

Can work on-site
Crailsheim (up to 50km)

Experience

  • CHI Software
    Senior Frontend Developer
    August 2023 - February 2025 (1 year and 6 months)
    Crailsheim, Germany
    Key Projects:

    Fintech Platform – San Francisco, CA, USA (remote)
    Developed a financial platform to manage projects, monitor investments, and streamline reporting.
    Tech Stack: Vue 2 / Vue 3, Vuex, Vue Router, JavaScript (ES6+), TypeScript, HTML5, SCSS, Webpack, Quasar, Storybook
    • Delivered reusable, modular components with responsive layouts
    • Implemented financial dashboards and data visualizations
    • Led migration from Vue 2 to Vue 3 and introduced TypeScript, improving maintainability
    • Conducted code reviews and mentored junior developers
    • Reduced error rate by 15% and improved app responsiveness by 10%

    ⭐ Supply Chain Management + Blockchain – Berlin, Germany (remote)
    Built a blockchain-based platform for managing and verifying supply chain documents.
    Tech Stack: Vue 2 / Vue 3, Vuex, Vue Router, JavaScript (ES6), Vue-Query, Jest, Cypress, HTML5, SCSS, Ant Design Vue, Vite
    • Developed core UI components using best UX practices and responsive design
    • Integrated blockchain layer for secure and immutable document handling
    • Refactored and optimized build process with Vite (−30% build time, −20% load time)
    • Increased test coverage to 85% using Cypress and Jest; reduced regression errors by 25%
    • Standardized codebase with ESLint and reviewed PRs for quality and clarity
    Vue.js Vuex Typescript HTML5 Quasar
  • CHI Software,
    Middle Frontend Developer
    September 2020 - August 2023 (2 years and 11 months)
    Crailsheim, Germany
    ⭐ E-commerce Platform – Los Angeles, CA, USA (remote)
    Developed and maintained storefront pages, enabling seamless content and inventory management.
    Tech Stack: Vue, Nuxt, Vue Router, Vuex, Vuetify, JavaScript, HTML, CSS, SCSS
    • Implemented product listings, search filters, and promotional components
    • Refactored layouts using Vuetify for consistent UX and improved performance
    • Managed application state via Vuex and ensured SSR with Nuxt
    • Actively collaborated with backend team and QA for smooth delivery

    ⭐ SaaS Platform – Web Page Editor – Berlin, Germany (remote)
    Built a no-code web editor for responsive page creation.
    Tech Stack: React, Redux, React Router, JavaScript, TypeScript, HTML, SCSS, Tailwind, Jest
    • Developed interactive UI components with React and Redux
    • Optimized performance and styling with Tailwind and modular SCSS
    • Diagnosed and resolved stability issues, increasing platform reliability
    Vue.js Nuxt.js Vuex Tailwind React.js
  • Solution Mentors
    Frontend Developer
    March 2018 - September 2020 (2 years and 6 months)
    Ukraine
    ⭐ E-commerce & Corporate Websites
    Created and maintained frontend for PHP-based corporate websites and e-commerce stores.
    Tech Stack: HTML5, CSS3, SCSS, JavaScript, jQuery, Bootstrap, Vue.js
    • Built responsive layouts and blog pages using Bootstrap and jQuery
    • Developed UI features in Vue.js for product listings and interactive components
    • Optimized for mobile and improved UX on legacy platforms
    • Participated in QA cycles and collaborated with design and content teams
    HTML5 Vue.js CSS3 Bootstrap jQuery

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Education

  • Master of Science in Computer Science
    Kharkiv National University of Radio Electronics
    2024
    Master of Science in Computer Science
  • Master of Science
    Donbas State Engineering Academy
    2009
    Master of Science

Skill set

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