I rebuilt the store from scratch on a custom WooCommerce theme - no off-the-shelf template, no plugin bloat. The mobile PageSpeed score went from 75 to 100, pages load instantly, and the client manages content and products on their own.
Hi,I'm Marcin
I turn slow, underperforming websites and stores into tools that actually make money.
8years of commercial experience
80+completed projects
100%satisfied clients
- CUSTOM WORDPRESS
- WOOCOMMERCE PERFORMANCE
- NEXT.JS & REACT NATIVE
- MODERN FRONT-END
- AI VISIBILITY
- BUILT FOR GROWTH
About
Full-stack developer based in Warsaw with 8 years of commercial experience. I specialise in custom WordPress and WooCommerce solutions - from PHP theme architecture and Gutenberg blocks in React/JSX to integrations with external ERP, PIM and API systems.
I work as a freelancer - directly with companies and through agencies. WordPress and WooCommerce are my core tools, but when a project needs more - a web app, mobile app or headless architecture - I have that covered too. Most projects are under NDA.
Work
View allUncommon Solutions
Solutions a typical agency won't build
A React Native mobile app (iOS + Android) for storing sensitive data with two-key encryption - the data stays unreadable even if a backup is compromised. Backups go to the user's own cloud (iCloud / Google Drive), so no one else ever touches the files.
I turned multi-step email ordering into an interactive in-browser configurator - the client designs the product, sees the price and submits the order without waiting for a quote. The order lands straight in a panel with complete data, payment is linked to it automatically, and client communication happens in one place.
My Expertise
Tailored WordPress and WooCommerce solutions built with performance, usability, and growth in mind.
WordPress and WooCommerce are my foundation. Next.js and React - when the project calls for it.
Stores & E-commerce
- WooCommerce Developmentfrom €3,500 · 3–8 wks
I build new stores or rebuild existing ones. Custom code from scratch - no marketplace templates.
- Performance Optimizationfrom €900 · 3–7 days
PageSpeed 90+ on mobile guaranteed, or the consultation fee is refunded.
WordPress & Front-End
- Custom WordPress Developmentfrom €2,500 · 2–6 wks
- Gutenberg & ACF Blocksfrom €600 · 3–5 days
- Design-to-Code Implementationfrom €900 · 1–2 wks
- Front-End Developmentcustom quote
When WordPress Isn't Enough
- Next.js / Reactfrom €6,000 · 6–16 wks
Web applications, SaaS platforms and projects where you need full control over architecture and performance.
- Headless WordPress + Next.jsfrom €5,000 · 4–10 wks
Content in WordPress, frontend in Next.js. A familiar CMS for the client, a modern stack for the developer.
- React Native (iOS + Android)custom quote
One codebase, two platforms. Battle-tested in production apps with encrypted storage and gamification.
Integrations & Automation
- API Integrationsfrom €1,200 · 2–5 days
- Custom Solutionscustom quote
I replace manual order handling and repetitive processes with tools that run without human input.
Process
- Free discovery call
- Quote with scope and timeline
- Iterative work with reviews
- Deployment
FAQ
A custom WooCommerce store built without a ready-made template starts from €3,500. The price depends on the number of products, required integrations and the level of customisation. Typical delivery time is 3–8 weeks.
A PageSpeed audit and optimisation costs from €900 and usually takes 3–7 business days. It covers Core Web Vitals analysis, image and font optimisation, elimination of render-blocking scripts, cache and CDN configuration, removal of unnecessary plugins and database query optimisation. A score of 90+ on mobile is guaranteed - otherwise I refund the consultation fee.
I start with a free discovery call (30–60 min) to understand the project's goal, scale and expectations. Then I prepare a quote with the scope of work and schedule. After acceptance, I work iteratively - regular contact, phased reviews, no surprises at the end. I use email or Slack for communication, reporting through Notion or a project document.
More and more users are searching for products and services through AI assistants (ChatGPT, Gemini, Perplexity). Websites with structured schema.org data, concrete facts and good information architecture are cited more often by AI models than sites without these elements. AI optimisation (GEO) is the natural evolution of classical SEO.
- CUSTOM WORDPRESS
- WOOCOMMERCE PERFORMANCE
- NEXT.JS & REACT NATIVE
- MODERN FRONT-END
- AI VISIBILITY
- BUILT FOR GROWTH