Navigation: portfolio, tech stack, process, testimonials and contact. Language switch: Polish and English.
From first release to steady growth —
I take ownership of your site or app
Focused on outcomes: design & build of web applications (Next.js/Node.js), integrations, deployment and continuous improvement.
Services: design and development of websites and web applications, Next.js and Node.js, payments and auth integrations, e-commerce, CI/CD, end-to-end testing, Core Web Vitals and accessibility.
Technologies and tools used in projects
Tech stack: Next.js and React on the frontend, Node.js on the backend, PostgreSQL, MySQL and MongoDB databases, GraphQL, CI/CD with Vercel and GitHub Actions, testing with Jest and Cypress, Stripe and Auth0 integrations, monitoring via Sentry.
Imprint / Company Info
Basic identification and contact details of the entity operating this website.
This document contains legal and operational information for website and web application design and development.
Entity operating the website
Jakub Grabski Development — contact: jakub@grabski.dev, Kłobuck, Poland.
Contact & hours
Email contact preferred. Remote worldwide cooperation. Working hours agreed per project.
Additional information
End-to-end services — from concept to maintenance and ongoing growth.
- Design & development of websites and web apps (Next.js/React, Node.js).
- SSR/SSG/ISR, SPA and hybrid setups on Vercel/AWS.
- E-commerce (e.g. Shopify/Medusa/Headless) incl. cart/checkout flows.
- Payments (Stripe, PayU/Przelewy24), invoicing and webhooks.
- AuthN/AuthZ (Clerk/Auth0/NextAuth) with RBAC/ABAC.
- Headless CMS (Sanity, Strapi, Contentful) + content modeling & migrations.
- API integrations: CRM, ERP, marketing automation, shipping, maps, AI.
- Performance & Core Web Vitals (LCP/CLS/INP) — audits and optimization.
- Technical SEO (meta/structured data, sitemap, i18n, internal linking).
- Accessibility/WCAG 2.2 — accessible components and usability testing.
- Testing (Playwright/Vitest), CI/CD, preview environments.
- Monitoring, logging & alerting (Sentry, OpenTelemetry).
- Maintenance/SLA, updates, and security hardening.
- Consulting, team workshops, code reviews and mentorship.
CEIDG registry details
- Business name
- Jakub Grabski Development
- Legal form
- Sole proprietorship
- Register
- CEIDG — Central Registration and Information on Business
- NIP
- 5742085508
- REGON
- 541533157
- Commencement date
- Principal place of business
- Kłobuck, Poland (remote)
- Country of registration
- Polska / Poland
- Registering authority
- Minister competent for economy (CEIDG)
- Business status
- Active
Data sourced from the public CEIDG register. A full excerpt can be provided upon request.