Владлен

Vladlen Koval
Kyiv city | [відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») |
[відкрити контакти](див. вище в блоці «контактна інформація») |
https://github.com/react-vlad

Important

Objective
Aspiring Fullstack JavaScript Developer with strong experience in building
dynamic web applications. Skilled in React, Redux, Next.js, Node.js, and
NestJS. Looking for remote, project-based work with flexible hours, willing
to dedicate several hours per day to contribute to meaningful projects,
grow professionally, and bring value to the team.

Skills
• Frontend:
• React, Redux, Next.js, HTML5, CSS3, SASS, TypeScript, JavaScript
(ES6+), Responsive Web Design, RESTful APIs, Webpack, Babel.
• Backend:
Node.js, NestJS, Express.js, REST APIs, GraphQL, WebSockets.
• Database:
MongoDB, PostgreSQL, MySQL, Sequelize, Mongoose.
• Version Control:
Git, GitHub, GitLab.
• Tools & Libraries:
Jest, Mocha, Cypress, Docker, Webpack, Babel, Nginx, AWS, CI/CD,
Agile/Scrum, Jira.
• Others:
Unit testing, Cross-browser compatibility, Security best practices, Code
optimization.

Experience

Fullstack JavaScript Developer
LTSC 2020-2022

• Developed and maintained web applications using React, Redux,
Next.js on the frontend and Node.js, NestJS on the backend.
• Integrated third-party APIs and optimized application performance
for scalability.
• Designed and built reusable components and UI libraries to ensure
consistency and maintainability.
• Worked closely with a cross-functional team, participating in sprint
planning, code reviews, and pair programming.
• Implemented responsive web designs using CSS3, SASS, and
modern JavaScript features to ensure mobile-first experience.
Fullstack Developer
Freelance 2022-2023
• Built single-page applications (SPAs) with React and Redux,
improving the user experience and performance of web apps.
• Enhanced the SEO of the application using Next.js by enabling
server-side rendering (SSR) and static site generation (SSG).
• Collaborated with backend developers to integrate RESTful APIs and
manage asynchronous data flow.
• Implemented testing frameworks like Jest to ensure code reliability
and robustness.
• Developed RESTful APIs and integrated them with frontend
applications.
• Worked with Node.js and Express.js to handle routing, middleware,
and data processing.
• Implemented authentication and authorization mechanisms,
including JWT and OAuth.
• Optimized database queries for performance using MongoDB and
PostgreSQL.

Education

Bachelor’s Degree in Computer Science
Taras Shevchenko National University of Kyiv 2015-2019

Certifications

• JavaScript Algorithms and Data Structures – freeCodeCamp
• React and Redux – Udemy
• Node.js – Codecademy

Languages

• English – Pre-intermediate
• Ukrainian – Native
• Russian – Fluent