Сергій

SERHIY MELNYCHUK
Front-end Developer
[open contact info](look above in the "contact info" section) t.me/serhmel
[open contact info](look above in the "contact info" section) github.com/serhmel
Kovel, Ukraine Portfolio

ABOUT ME

I’m a Front-end Developer with approximately five years of professional experience in web
development, including over four years of working extensively with React. I’m a responsible, detail-
oriented, and self-motivated engineer who thrives on turning challenging ideas into clean, efficient,
and user-friendly interfaces. My passion lies in solving complex problems, building innovative
features, and contributing to projects that create meaningful impact.

HARD SKILLS

JavaScript (ES6+), TypeScript, HTML5, CSS3 BigCommerce, Shopify
React, Node.js, jQuery, SASS/LESS Git, Docker, Jira, Figma
Redux, Context API, Zustand REST API, GraphQL
React Hook Form, Zod Webpack, Gulp, Vite
Tailwind CSS, Material-UI, Bootstrap

EXPERIENCE
Front-end Developer Sep 2025 – May 2026
NextCRM (eCommerce CRM Startup)
Led front-end development of a CRM system from scratch for eCommerce and dropshipping
businesses
Designed and implemented the front-end architecture and project structure at the early stage
Developed core system features including product management, order workflows, and user
interactions
Integrated third-party services such as marketplaces, payment systems, and communication
tools
Translated business requirements and UI designs into functional and user-friendly interfaces
Maintained scalability and consistency of the codebase as the product evolved
React Developer May 2022 – Apr 2025
Backendless Corp
Developed and integrated 20+ reusable components into the platform’s UI Builder.
Created an AI-powered Schema Generator to produce database schemas using OpenAI.
Contributed to development and improvement of diverse data visualizations, including charts,
heatmaps, data grids, kanbans, and calendars.
Utilized Node.js on the server side to implement business logic, manage file storage, and handle
API interactions.
Conducted code reviews to maintain code quality across the team.
Enhanced the console’s user interface and overall performance.
Front-end Developer Jul 2021 – May 2022
Freelance
Worked on BigCommerce and Shopify platforms, focusing on fixing bugs, creating new pages,
and implementing custom features.
Developed and tweaked themes to improve user experience and functionality.
Collaborated with clients to meet their specific needs and improve their online stores.
Entrepreneur Mar 2016 – May 2021
Retail trade
Sales Representative Dec 2013 – Mar 2016
LLC "Yukon-Prodtrade", Kovel
EDUCATION
Master of Business Economics Sep 2008 - Jun 2013
National University "Ostroh Academy", Ostroh
Specialization in Finance and Credit

LANGUAGES

Ukrainian English Russian
Native Intermediate Advanced