arthurthecreato

Location: Warsaw, Poland (CET) Remote: Yes (EU/global; US-hours overlap is fine) Willing to relocate: No Technologies: TypeScript, React/Next.js, Vue/Nuxt, Node.js (Express/NestJS), PostgreSQL, WebSockets (Centrifugo/protobuf), GrowthBook A/B, Vite, Sentry, Claude Code / agent tooling Résumé/CV: https://linkedin.com/in/arthursereda Email: [email protected]

Senior frontend engineer, 5+ years, front-end leaning full-stack. Last role (SKELAR): designed a config-driven funnel platform — an 8,866-line hand-built Vue funnel became ~1,200 lines of JSON config; 44 flows in production, 31 of them authored by other engineers writing only JSON. Built the A/B testing layer (GrowthBook, 30 split tests), the subscription/paywall layer (Solidgate, Primer), and the client-side real-time layer (Centrifugo WebSockets, 18 event types). Led a Webpack→Vite migration across ~71k lines with the test suite intact.

I also build the AI tooling teams actually adopt: a shared Claude Code config picked up voluntarily by 5 engineers across 4 repos, with an 83% cut in per-session token overhead. Open source: github.com/arthurseredaa

Looking for: senior frontend or Node full-stack, product company, remote-EU or Warsaw hybrid. B2B or employment, 7-day notice.