Костянтин

Kostiantyn Borysov
Front-end Developer
Dnipro, Ukraine∙ [відкрити контакти](див. вище в блоці «контактна інформація») ∙ [відкрити контакти](див. вище в блоці «контактна інформація») ∙ [відкрити контакти](див. вище в блоці «контактна інформація»)

SUMMARY
A dedicated Front-end Developer with 4 years of professional experience specializing in building user-centric, performant,
and accessible web applications. Passionate about optimizing web experiences and adapting modern technologies. Always
open to learning and exploring the latest in the IT industry..

PROFESSIONAL EXPERIENCE
Front-end Developer Feb 2021 - Present
RSA Devs, Krakow, Poland.

Responsibilities:
● Development and adaptation of React components, including integration with micro-markup.
● Development of React components in Next.js with various rendering types.
● Optimization of React components for performance and accessibility using Google Lighthouse.
● Writing tests using Jest, Cypress, and Cucumber.
● Integration of custom animations and interactive elements using Framer Motion, Lottie, or GSAP

Achievements:
● Developed a custom multi-level administrative panel for managing sales statistics and employee data, featuring
functionality for sorting employees by position, store, sales volume, and other parameters.
● Created a module integrating with the Leaflet Maps API for monitoring housing across cities in Poland.
● Improved the SEO of a promotional website by integrating micro-markup and optimizing meta tags, leading to
increased organic traffic. Enhanced component accessibility by adding ARIA attributes and semantic HTML.
● Optimized application performance using techniques such as tree-shaking and lazy loading.
● Integrated drag-and-drop functionality for tracking order status.
● Refactored class components into functional components with hooks, improving code readability and simplifying
maintenance.
● Implemented photo uploads on iOS mobile devices via file sharing.

EDUCATION
● Dnipro State Academy of Physical Culture and Sports, Master, 2021.

LANGUAGES
Ukrainian: Native, English: B1.

SKILLS
Languages: JavaScript, TypeScript, HTML5, CSS3, SCSS.

Frameworks and Libraries:
React, Next.js, shadcn/ui, Tailwind, Sass, Figma, Lottie, DnDKit.

Backend and Databases:
Node.js, NestJS, ExpressJS, REST API, PostgreSQL, MySQL, MongoDB, Prisma, Drizzle, Axios.

State Management
Redux, Redux Toolkit, Zustand, TanStack Query, React Hook Form, Zod.

Authentication and Security:
JWT, NextAuth.

Testing and QA:
Jest, Cypress, Playwright, Cucumber, WebdriverIO.

DevOps and CI/CD:
Git, GitHub, GitHub Actions, Docker, Docker Compose.

Other Skills: oAuth, JWT, Axios, Formik, Yup, Clerk, Stripe.

Workflow and Platforms:
Jira, Slack, Confluence, Linux, Windows (WSL).