Оксана

Oksana Khainus
FRONTEND DEVELOPER
Email: [відкрити контакти](див. вище в блоці «контактна інформація»), Phone: [відкрити контакти](див. вище в блоці «контактна інформація»), Telegram: @Oksana_Khainus, GitHub:
https://github.com/Oksanas1, Linkedin: [відкрити контакти](див. вище в блоці «контактна інформація»)

OBJECTIVE

Frontend Developer with 3+ years of commercial experience building data-driven business applications with
React and TypeScript. Experienced in ERP systems, complex business logic, REST API integrations,
document workflows, reporting and structured data processing.

Strong in debugging, refactoring and developing production features in collaboration with backend
developers and business analysts. Experienced with React, Redux Toolkit, Next.js, TypeScript and modern
frontend development workflows.

Use AI-assisted development tools such as Cursor and GitHub Copilot for code analysis, debugging,
refactoring, technical research and implementation while maintaining responsibility for technical decisions
and code quality.

SKILLS

1. Frontend: JavaScript (ES6+), TypeScript, React, React Hooks, Redux, Redux Toolkit, Next.js,
React Router
2. UI & Styling: HTML5, CSS3, SCSS/Sass, MUI, styled-components, Responsive Design,
Cross-browser Development, BEM
3. APIs & Data: REST API, Axios, Fetch API, JSON, XML, XLSX, asynchronous data handling, data
validation
4. Development: Business Logic, Debugging, Refactoring, Code Review, Performance Optimization,
Error Handling
5. Tools & Workflow: Git, GitHub, Postman, Cursor, GitHub Copilot, Webpack, Babel, npm, Jest,
DevTools, Figma, VS Code
6. Engineering Practices: Agile, Scrum, Kanban, CI/CD, task estimation, collaboration with backend
developers and business analysts

EXPERIENCE

MAСС Systems, Front-end developer February 2025 - present
Responsibilities
● Develop and maintain ERP modules for billing, document management and tax reporting using
React, TypeScript and Redux Toolkit.
● Implement complex business logic and user workflows, translating business requirements into
reliable frontend solutions.
● Integrate frontend modules with internal D5 ERP platform APIs and REST APIs using Axios and
Postman.
● Work with structured business data including XLSX, JSON and XML and support
document-processing workflows.
● Develop functionality for reporting, data validation, document exchange and tax-reporting
processes.
● Investigate and fix complex production issues, refactor existing code and implement large-scale UI
and functional changes with attention to regression risks.
● Collaborate with business analysts and backend developers to clarify requirements and align
frontend behavior with business processes.

● Use Cursor and GitHub Copilot for code analysis, debugging, refactoring, technical research,
documentation and implementation.

Tech Stack: JavaScript, TypeScript, React, Redux Toolkit, HTML, SCSS, Git, Axios, Postman, D5 ERP
Platform, Cursor, GitHub Copilot

SoftLab Pro, Front-end developer September 2024 - February 2025

Responsibilities:

● Developed new features and improved existing functionality for a live-scores and sports statistics
web application.
● Integrated complex APIs and implemented data fetching, error handling and real-time data-related
functionality.
● Optimized existing frontend code for scalability, maintainability and performance.
● Participated in code reviews and incorporated technical feedback to improve code quality.
● Worked with CI/CD workflows, task estimation, Kanban processes and daily team communication.

Tech Stack: TypeScript, React, Redux, Next.js, MUI, HTML, CSS, Ajax
ERS Solution, Programmer May 2021 – November 2022
Responsibilities:
● Developed and refactored functionality in 1C applications to improve business workflows and user
experience.
● Analyzed databases and optimized SQL queries for application functionality and data processing.
● Participated in code reviews and Agile team processes.
● Worked with business-oriented software and translated requirements into technical solutions.

Tech Stack: 1C, SQL

SELECTED PROJECT

Employees Directory — React Application

React-based business application for managing and displaying employee information.

Tech: React, TypeScript, Redux Toolkit, React Router, HTML, SCSS, Webpack, Babel

Focus: State management, reusable components, routing, responsive UI and structured application
architecture.

Demo
Github

EDUCATION

Front-end Developer, Gromcode online University 2024
Lawyer, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 2006 – 2012

LANGUAGE

English(Intermediate), Ukrainian(Native), Russian(Fluent)