Евгений

YEVHEN
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DUPLENKO https://github.com/JustJeckill

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FRONT-END DEVELOPER -duplenko-974634168/

PROFILE EDUCATION
I’m a Front-End Developer with 5 years of experience, focused 09/2021 - 06/2022
on building fast, scalable, and user-friendly web applications. The Ukrainian State University of Science
My core expertise lies in modern frontend development, And Tech - Dnipro, Ukraine
including React, Next.js, TypeScript, and clean UI architecture. Master's Degree: Computer Science
09/2010 - 06/2015
Over the past six months, I’ve also been working on the server The Ukrainian State University of Science
side, gaining hands-on experience with Node.js, Express, And Tech - Dnipro, Ukraine
NestJS, and PostgreSQL. This full-stack exposure Master's Degree: Applied Mechanics
strengthened my understanding of application structure, API
design, authentication, and deployment.
COURSES
I write clean, maintainable code, collaborate effectively with
11/2019 - 03/2020
designers and backend engineers, and enjoy contributing to
EPAM - Dnipro, Ukraine
both product quality and architecture. I’m constantly learning
Front-End Fundamentals
and adapting to new technologies, aiming to deliver reliable
and well-structured solutions.

TECHNICAL SKILLS
Strong skills
WORK EXPERIENCE
HTML, CSS
01/2025 - current time JavaScript (ES6) / Typescript
Market Bullet - Calgary, Canada / Wroclaw, Poland React.js / Next.js
Front-End Developer (full-time, remote) React Hook Form
Refactored legacy codebase and removed outdated Redux (Redux-Toolkit) / Tanstack
Webpack / Vite
libraries to improve maintainability
SASS/SCSS Preprocessors
Developed and launched new product features in
PostCSS, TailwindCSS, shadcn
alignment with business goals by Vue/React Animation (lottie, react-lottie)
Fixed and enhanced adaptive layouts for a consistent Node.js
experience across all devices npm / yarn
Created and maintained clear documentation for new Git (GitHub, GitLab)
features and updated it post-refactoring Eslint, Prettier, lint-staged, husky
Collaborated closely with back-end developers to deliver
integrated features Basic skills
Express.js / Nest.js
PostgreSQL, MySQL, MongoDB
Prisma, Sequelize
WebSockets
Mailing (SendGrid, SMTP, Nodemailer)
Docker
PHP
09/2024 - current time SOFT SKILLS
SLOVO® / Braynex - Wroclaw, Poland Agile / Scrum
Front-End/Full-stack Developer (part-time, remote) Clear Communication
Developed and maintained scalable web applications Problem Solving
from scratch with clean architecture Adaptability & Fast Learning
Built responsive, cross-browser UIs using HTML, CSS,
and JavaScript
Migrated frontend to Next.js with TypeScript, improving
LANGUAGES
performance, SEO, and code reliability
Implemented interactive features and optimized builds Ukrainian - Native
Russian - Native
using Webpack to improve load times
English - B2 (Intermediate)
Contributed to the development of a SaaS product,
Polish - B1 (Pre-Intermediate)
participating in both frontend and backend
implementation
Designed and developed backend services using NestJS,
building REST APIs to support core product functionality
and business workflows
Modeled and managed PostgreSQL data using Prisma
ORM, ensuring data integrity and type safety
Configured Docker for local development and
deployment

12/2020 - 08/2024
Phonexa - Dnipro, Ukraine / Toronto, Canada
Front-End Developer (full-time, office/remote)
Developed features for mobile and desktop platforms
across multiple browsers
Collaborated with cross-functional teams, including
designers, backend developers, and product managers,
to deliver new features
Troubleshot and resolved frontend issues to maintain
project stability and delivery timelines
Developed and maintained high-performance web
applications using React and Redux, ensuring
consistent UX across major browsers and devices
Optimized websites for SEO and performance
Refactored existing functionality to improve code
quality and maintainability