Roman Onyshchenko
I help businesses build
I build modern web applications end to end — from landing pages and MVPs to full-scale SPAs, dashboards, admin panels, and ecommerce storefronts. From first commit to production launch, I create fast, maintainable products with modern React, robust architecture, and AI-assisted workflows.
Role
Full-Stack JavaScript developer
Focus
React/Next.js + TypeScript
Location
Ukraine / Remote
EPAM 6+ years
AI-Assisted Engineering
Generative AI Training
Available for selected projectsMain skills
Product thinking
UX-minded frontend
Admin workflow design
Performance optimization
Security-minded development
Technologies
Next.js
React
TypeScript
Chakra UI
Prisma
PostgreSQL
Better Auth
Stripe
Sentry
next-intl
AdminJS
Express
Expertise
Ecommerce storefronts
Single page applications
Admin panels
Checkout flows
Operational dashboards
Services
Practical frontend and full-stack support
I help shape product interfaces from first landing impression through operational admin workflows, using clean UI systems and backend-ready structure.
Ecommerce frontend development
Fast storefront interfaces with localized product discovery, responsive catalog layouts, search, cart and wishlist flows, checkout trust, and SEO-ready page structure.
- Next.js App Router storefronts
- Catalog, search, cart, and wishlist UX
- SEO and performance-minded UI
Admin panels and dashboards
Operational interfaces for products, orders, reviews, users, localized content, reporting, readonly access, and internal team workflows.
- AdminJS resource and action design
- Reusable forms for bulk operations
- Role-aware and readonly workflows
Landing pages and UI systems
Polished static landing pages with reusable design tokens, accessible components, responsive project storytelling, and future CMS/API integration points.
- SSG-first portfolio and product pages
- Reusable Chakra UI systems
- Clear conversion and contact paths
Portfolio
Selected commerce and operations work
Each project card points to a focused static case-study page built from the real storefront and AdminJS architecture in this workspace.
Customer-facing commerce
Online Store
A production Next.js storefront with localized catalog discovery, search, cart and wishlist actions, product reviews, checkout with live coupons, account flows, SEO, a Stripe-integrated payment architecture, Resend email, Sentry-aware observability, and Vercel deployment.
Next.js 16
App Router storefront
Stripe
payment integration
9
core commerce flows
Localized catalog and search
Cart, wishlist, reviews, checkout
SEO and observability
Operations workspace
Admin Panel
A separate AdminJS runtime for catalog management, product variants, bulk actions, order fulfillment, coupon and promotion management, a real-time operations dashboard, user sessions, review oversight, readonly access, CSP, rate limits, and Sentry-aware observability.
AdminJS 7
operations runtime
48+
custom admin actions
Product and CSV/XLSX operations
Order lifecycle tools
Readonly hardened sessions
Have a project that needs a clear technical path?
Prefer direct contact? foghornbay@gmail.com or Telegram @Roman_Onyshchenko_UA