I'm Yevhen — a Full-Stack Software Engineer from Ukraine, based in Amsterdam 🇳🇱.

I build production web applications end-to-end in the React / Next.js / TypeScript ecosystem, and I'm currently freelancing for live clients in hospitality and wellness across the Netherlands and Slovakia. My background as Head of Sales before pivoting into engineering through HackYourFuture gives me a builder's mindset — I care about what actually ships value.

I work AI-native: Cursor, Claude, and Copilot are part of my daily loop for architecture, refactors, debugging, and shipping fast without cutting corners.

🎯 Open to Full-Stack / Software Engineer roles in the EU (remote or Amsterdam-based).

• 🏨 Allure Booking HUB — an in-house Property Management System replacing vendor SaaS (RoomRaccoon/Mews) for a 3-property Amsterdam hospitality group.
• 💇 Hair Chief — booking + portfolio system for an Amsterdam hair studio (Next.js 16, React 19, Tailwind v4, Firebase).
• 💆 V2studio · Epilroom — multilingual booking platform live at v2studio.sk.

Languages

Frontend

Backend & Data

Testing & Quality

DevOps & Deployment

Tools

I treat AI as an engineering tool, not a chatbot. It's part of how I plan, ship, and review production code every day.

Daily drivers

How I use it

• 🏗 Architecture & design discussions before touching code
• ⚡ Feature implementation and rapid prototyping
• 🐛 Debugging complex production issues
• 🔁 Refactoring at scale (types, hooks, server actions)
• 🔍 Second-opinion code review before pushing
• 📝 Technical documentation & release notes
• 🧪 Test-case generation and edge-case coverage
• ✍️ Prompt engineering — picking the right model for the task

• Full-stack application architecture (Next.js App Router, Server Components, Server Actions)
• REST API design & integration
• Authentication (NextAuth v4/v5, Firebase Auth, JWT)
• Responsive, mobile-first UI with component-based architecture
• Single-tenant SaaS patterns & multi-tenant design
• CI/CD with GitHub Actions, Vercel deploys, environment management
• Performance optimization & Core Web Vitals
• Test automation with Playwright & Vitest
• Git workflow, code review, Agile/Scrum delivery
• Internationalization (next-intl), transactional email (Resend), PDF generation

In-house Property Management System for a 3-property Amsterdam hospitality group (38-room hotel + 28 apartments). Replaces vendor SaaS like RoomRaccoon/Mews. Encodes Dutch VAT/city-tax, government registration, housekeeping cadences, and live occupancy dashboards.
Stack: Next.js · TypeScript · Firebase · NextAuth · Zod · Tailwind CSS

Multilingual booking platform for a premium studio in Bratislava. Drag-and-drop admin calendar, WhatsApp + email notifications, PDF invoicing, Playwright + Vitest test suite, GitHub Actions CI.
Stack: Next.js · TypeScript · Firebase · NextAuth v5 · next-intl · Resend · Radix UI · Framer Motion

Portfolio + online booking system for an Amsterdam hair studio. Public calendar, time-slot picker, confirmation emails, protected admin dashboard.
Stack: Next.js 16 · React 19 · TypeScript · Tailwind v4 · Firebase · FullCalendar · Resend

E-commerce platform for a firearm-care brand. Long-running full-stack playground: auth, DB modeling, server actions, Vercel deploys. Also live at daypatron.com.ua.
Stack: Next.js · TypeScript · NextAuth · Prisma · MongoDB · Tailwind CSS

Drag-and-drop CV builder with PDF export — I use it to produce my own CV.
Stack: Next.js 16 · React 19 · Zustand · dnd-kit · jsPDF · Upstash Redis

💬 Building production apps in the React ecosystem — with AI as a first-class tool.
📬 Reach me at ugnivenko.ea@gmail.com