LinkedIn · Portfolio · andrejbutik@gmail.com

Wrocław, Poland · open to remote

Frontend Developer with 1.5+ years of commercial experience in React and TypeScript across a multi-brand platform (30+ locales), a regulated online casino, a multi-module CRM and a healthcare application. Focus on performance, localization and CI quality; comfortable making backend changes in NestJS and Spring Boot. Used to working in cross-functional teams with designers, QA and product owners.

• 🌍 TenThousand — Full-Stack Developer (Sep 2026 – Present) Multi-brand consumer platform, 30+ locales: Astro SSR + Spring Boot, A/B and painted-door experiments, shared client JS moved out of the backend, build-time locale consistency checks
• 🎰 Online Casino Platform (NDA) — Frontend Developer (Jun – Oct 2026, part-time) Regulated multi-brand online casino (4 regulated markets, UK and EU): 38 merged PRs, Swedish market launch, fixed an i18n init race, consolidated typography
• 🏢 Emdula — Frontend Developer (Jan – Aug 2026) React CRM for real-estate agencies: main JS chunk −45% (621 → 341 KB gzip) via route-level code splitting, ESLint backlog 225 → 0, components reorganized into 21 domain folders
• 🏥 ZenBit — Full-Stack Developer Intern (Mar – May 2026) Passwordless magic-link auth end to end (React + NestJS, TypeORM/MySQL, JWT, Swagger), 4-step clinical-data de-identification wizard UI, app shell and dashboard
• 🛠️ Freelance — Frontend Developer (May 2025 – Present) Websites built to order: VM Design (5 locales, technical SEO, Lighthouse 100 desktop) and Grosters (solo delivery)

Frontend

State & Data

Backend

Cloud & DevOps

Tools

⚠️ Production work (TenThousand, the online casino platform, Emdula, ZenBit) is proprietary / under NDA. Below are live client sites and personal / bootcamp projects.

VM Design Multilingual portfolio site for an interior architecture studio — 22 projects, 5 locales, 216 static pages, 4,500+ AVIF/WebP image variants, WebGL gallery (OGL), custom SVG maps from GeoJSON, technical SEO (hreflang, i18n sitemap, JSON-LD), CI/CD from GitHub Actions to Cloudflare Workers. Lighthouse 100 in all four categories on desktop; 96+ Performance and 100 in the rest on mobile. Freelance · Astro · TypeScript · OGL · Cloudflare Workers · GitHub Actions

Grosters Responsive 4-page commercial website — animations, modals, clean UI/UX. Lighthouse 99 Performance / 100 Best Practices / 91 Accessibility · Source Solo · HTML · SASS · JavaScript

Movie Gallery Movie search app powered by TheMovieDB API — Next.js, TypeScript, React Query, debounced search, genre filtering, pagination. Solo · Next.js · TypeScript · React Query

NoteHub Authentication system with protected routes, sign-in/sign-up flows, session management, custom middleware. Solo · Next.js · TypeScript

Clothica Shop E-commerce storefront — main page, product catalog, navigation. Team · Next.js · TypeScript · Vercel

Online Shop Full-stack shop with auth, Goods page, backend API integration. Team · Next.js · Tailwind · Node.js · Express · Vercel

📧 andrejbutik@gmail.com 📱 +48 734 766 886 💼 LinkedIn 🌐 Portfolio