Катерина

Kateryna Holub
Kyiv, Ukraine / Remote
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LinkedIn
GitHub

PROFESSIONAL SUMMARY

Fullstack Developer with 5+ years of experience. Strong foundation in React,
Angular, and Next.js, complemented by hands-on experience with NestJS, Node.js,
PostgreSQL, and MongoDB. Proven ability to deliver features across the full stack:
from UI architecture to API design and database integration. Experienced in
technical documentation and customer-facing demonstrations.

SKILLS

Frontend Technologies:
React.js, Next.js, Redux Toolkit, React Query, Angular, RxJS

Backend and Fullstack:
Nest.js, Node.js

Programming Languages & Concepts:
TypeScript, JavaScript (ES6+)

Web Technologies:
HTML5, CSS3, SCSS/SASS, REST APIs

Testing:
Vitest, React Testing Library, Jest

Databases:
PostgreSQL, MongoDB

Methodologies, Concepts:
SOLID Principles, Object-Oriented Programming (OOP), TDD, Agile/Scrum

Tools, Platforms:
Git (GitHub, GitLab), CI/CD (GitHub Actions), Docker, Swagger, Postman, Unix, Jira,
Confluence, Notion

AI Tools:
Claude Code, ChatGPT, Gemini
PROFESSIONAL EXPERIENCE

Star - Middle Fullstack Developer
Remote, September 2022 - Present
Industries: Fintech, Enterprise SaaS, E-commerce

● Architected and developed scalable web applications delivering robust and
highly reusable UI components.
● Developed and maintained backend features using NestJS and Node.js,
including REST API endpoints and PostgreSQL/MongoDB integrations,
contributing to full-cycle feature delivery.
● Led frontend migration from React to Angular, improving code maintainability and
aligning with long-term product architecture.
● Optimized data handling and REST API integrations using advanced state
management, significantly reducing client-side loading times and redundant
network requests.
● Conducted customer demos and communicated technical solutions to
stakeholders.

Stack: React.js, Next.js, Angular, TypeScript, Redux Toolkit, React Query, RxJS.

Star - Junior Frontend Developer
Remote, August 2021 - August 2022
Industries: Fintech, Enterprise SaaS, E-commerce

● Troubleshot frontend bugs within components, significantly improving UI stability
and overall user experience.
● Integrated REST APIs and optimized data handling across the application.
● Developed and updated email templates and web pages in line with branding
requirements.

Stack: React.js, TypeScript, Redux Toolkit, React Query.

Star - Frontend Intern / Technical Support Engineer
Remote, March 2020 - July 2021
Industries: Fintech, Enterprise SaaS, E-commerce

● Troubleshot and resolved frontend issues in React components.
● Created and managed bug reports, improving issue tracking efficiency.
● Assisted in database updates and basic data manipulation.

Stack: React.js, TypeScript.
EDUCATION

Igor Sikorsky Kyiv Polytechnic Institute
Master’s Degree in Computer Science, 2018 - 2019
Bachelor’s Degree in Computer Science, 2014 - 2018

PROJECTS

E-Commerce Web Application
Live Demo: https://megashop-client.onrender.com/
GitHub: https://github.com/kategolub/e-store/

● Designed and engineered a full-stack e-commerce web platform utilizing Next.js,
Nest.js, and TypeScript for a modern, server-side rendered frontend architecture.
● Built and optimized scalable backend REST endpoints using Nest.js, ensuring
seamless API communication.
● Orchestrated local application workflows using containerized environments and
successfully deployed the production infrastructure on Render for continuous live
access.

Stack: Next.js, Nest.js, Node.js, Redux Toolkit, React Query.

COURSES

Anthropic AI Fluency: Framework & Foundations

LANGUAGES

● English - Upper-Intermediate (B2)
● Ukrainian - Native

ADDITIONAL INFORMATION

● Experience working independently with minimal supervision, as well as
collaborating seamlessly in remote, distributed environments.
● Strong problem-solving and debugging skills.
● Comfortable presenting technical solutions to non-technical stakeholders.