Olena Bereziuk
Senior Full-stack Engenier
Ukraine (GMT+3)
Full-time
7 years
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Professional Summary
Senior Full-stack Engineer with 7 years of commercial experience building scalable web applications and e-commerce platforms. Strong expertise in React, TypeScript, and Node.js with hands-on experience across frontend and backend architecture. Experienced in Shopify development, custom storefronts, and third-party integrations. Focused on maintainable code, performance, and reliable production delivery.
Key Strengths
Specialization
Technologies
Main technologies
React
7 years
Node.js
7 years
Shopify
4 years
Additional skills
Experience Highlights
2023 – Present
3 years
Senior Full-stack Engineer
Multi-market e-commerce platform serving customers across several European markets.
Responsibilities
- Developed React and Next.js storefront features.
- Built Node.js services and third-party integrations.
- Integrated Shopify Storefront API and custom checkout functionality.
- Improved application performance and Core Web Vitals.
- Participated in architecture decisions and code reviews.
Tech stack
React
Node.js
TypeScript
Next.js
PostgreSQL
Shopify
Liquid
Mar 2020 – Mar 2023
3 years
Full-stack Engineer
SaaS platform for managing subscriptions, customer accounts, and online payments.
Responsibilities
- Built reusable frontend components;
- Developed REST APIs and backend services;
- Integrated payment providers;
- Implemented automated tests;
- Maintained CI/CD pipelines.
Tech stack
React
TypeScript
Node.js
PostgreSQL