Request a technical audit
I review WordPress risk, performance, technical SEO, schema, integrations, and the parts that block growth.
Describe the problem
Mariusz Szatkowski, senior freelance engineer based in Gdynia, EU.
WordPress, Astro, and Next.js engineering for AI-ready commerce.
I build modular platforms: WordPress as the CMS, Astro or Next.js as the front end, Cloudflare Workers at the edge, and AI integrations where they add real value. Twenty years in the WordPress ecosystem, EU jurisdiction, B2B. You work directly with the engineer who ships.
EU jurisdiction. GDPR + DORA + NIS2 ready. Direct engagement, no agency overhead.
Services & Solutions
Comprehensive solutions for your online presence
E-commerce Online Stores
I build multilingual online stores using WordPress and WooCommerce. Integration with payment providers, logistics and warehouse systems. Responsive views for all devices.
WordPress Websites
I optimize loading speed and technically prepare sites for SEO. I create implementations for marketing campaigns, increasing e-sales and brand recognition in search results.
Theme & plugin customization
I modify and fix broken site elements. I adapt plugins to individual client needs. I create WordPress page templates and write code for premium themes.
Performance optimization
Core Web Vitals and loading times under one second. I audit and optimize images, scripts, CSS. I implement lazy loading, cache and CDN for maximum speed.
Modern stack migration
I migrate sites to Astro and Next.js while preserving SEO. Headless WordPress as backend. Static generation for lightning-fast loading and better security.
Security & Support
Secured installations, security headers and regular audits. Updates, backups and 24/7 monitoring. Fast incident response and protection against attacks.
GEO and LLMO for Brands
I design content and data structures so your brand is cited by ChatGPT, AI Overviews, and Perplexity. It combines technical SEO, entities, and conversational query strategy.
Universal Commerce Protocol
Make your business visible to AI shopping agents in Google AI Mode, ChatGPT Shopping, and Perplexity. UCP implementation, Schema.org optimization, and AI agent endpoints.
WooCommerce developer
Want to create a WooCommerce online store?
I will build a professional sales store for you.
Website rebuild
Want to rebuild or modernize your website?
Refresh the look and functionality of your site.
Website and online store creation
Want to create a WordPress-based website?
Comprehensive website creation from scratch.
WordPress programmer
Looking for a WordPress programmer?
I code plugins, themes and custom functions.
WordPress specialist
Looking for a WordPress specialist?
Solving difficult problems and optimization.
View all locations
Looking for a developer in your city?
Local support in London, Amsterdam, Stockholm and major European hubs.
Website performance improvement
Want to speed up your website loading time?
Faster site means more clients and better SEO.
Migration to Astro/Next.js
Want to migrate your site to Astro or Next.js?
Modern technologies for your business.
GEO / LLMO
Want your brand visible in AI answers?
Build GEO and LLMO visibility with entity design and citation strategy.
Universal Commerce Protocol
Universal Commerce Protocol
Make your business visible to AI shopping agents.
Available for new projects
My name is Mariusz
Szatkowski
As an experienced WordPress developer, I have been creating multi-language, responsive websites, online stores, and mobile applications since 2007, modifying both the front-end and back-end of services for individual client needs. I program micro-animations and information structures in websites, and optimise site code for SEO. As a WordPress programmer, I accelerate website loading times and optimise site performance according to Google Web Vitals guidelines. I patch software holes, secure, and repair websites after breaches. Since 1996, I have been creating websites and software for online campaigns, and since 2007, I have been migrating and customising client sites to WordPress, optimising websites for investment in modern communication solutions in internet marketing. I also co-organise WordUp and WordCamp WordPress meetups, meetings of the WordPress Tri-City community.
Mariusz Szatkowski
WordPress Expert
Recommendations from LinkedIn
Recommendations and reviews of working with WPPoland
Selected recommendations from WordPress, WordCamp and e-commerce leaders - with a focus on delivery on time, technical depth, and a business-driven approach to WordPress development.
Karolina Czapla
Marketing Strategist – Performance & Digital Strategy
“Working with Mariusz on WordCamp has shown me how rare it is to combine deep technical skill with genuine leadership. He plans, coordinates and delivers with precision, while giving the team space to grow and contribute....”
Co‑organiser, WordCamp Gdynia 2024 & 2025
Argert Boja
Senior Full‑Stack Developer
“Mariusz is the teammate everyone hopes for: strong full‑stack WordPress skills, clear explanations and a positive attitude even under pressure. He moves easily between custom plugins, performance work and Gutenberg layou...”
Worked alongside Mariusz on WordPress projects
Daniel Blossfeld
Process Optimization & Digitalization Consultant
“I had the pleasure of working with Mariusz for almost three years. During that time, his WordPress development skills proved invaluable across a range of projects, from website builds to online member areas and even Shop...”
Mariusz was his client for WordPress work
Jessica Di Pasquale
Leading SEO initiatives with data-driven growth strategies.
“Mariusz is a very skilled, patient and expert guy. Always ready to help and to fix errors, I really appreciated working with him. He is such a great colleague!”
Managed Mariusz directly
Belinda Koch
Web-Tracking Analyst at TUI
“Mariusz is a great person to work with. He is extremely motivated to learn new things and share his knowledge, and is very knowledgeable on a wide range of topics. We worked together on digital analytics and tracking top...”
Worked with Mariusz on digital analytics and tracking topics
Paweł Lewczuk
Front-end developer, WordPress developer
“I collaborated with Mariusz on several projects and our cooperation was always exemplary. I believe there are many more joint projects ahead of us. Highly recommended!”
Mariusz was Paweł's client
Karolina Czapla
Marketing Strategist – Performance & Digital Strategy
“Working with Mariusz on WordCamp has shown me how rare it is to combine deep technical skill with genuine leadership. He plans, coordinates and delivers with precision, while giving the team space to grow and contribute....”
Co‑organiser, WordCamp Gdynia 2024 & 2025
Argert Boja
Senior Full‑Stack Developer
“Mariusz is the teammate everyone hopes for: strong full‑stack WordPress skills, clear explanations and a positive attitude even under pressure. He moves easily between custom plugins, performance work and Gutenberg layou...”
Worked alongside Mariusz on WordPress projects
Daniel Blossfeld
Process Optimization & Digitalization Consultant
“I had the pleasure of working with Mariusz for almost three years. During that time, his WordPress development skills proved invaluable across a range of projects, from website builds to online member areas and even Shop...”
Mariusz was his client for WordPress work
Jessica Di Pasquale
Leading SEO initiatives with data-driven growth strategies.
“Mariusz is a very skilled, patient and expert guy. Always ready to help and to fix errors, I really appreciated working with him. He is such a great colleague!”
Managed Mariusz directly
Belinda Koch
Web-Tracking Analyst at TUI
“Mariusz is a great person to work with. He is extremely motivated to learn new things and share his knowledge, and is very knowledgeable on a wide range of topics. We worked together on digital analytics and tracking top...”
Worked with Mariusz on digital analytics and tracking topics
Paweł Lewczuk
Front-end developer, WordPress developer
“I collaborated with Mariusz on several projects and our cooperation was always exemplary. I believe there are many more joint projects ahead of us. Highly recommended!”
Mariusz was Paweł's client
Most common client questions
Frequently Asked Questions
Clear answers on collaboration, process, and business outcomes.
SEO-ready GEO-ready AEO-ready 6 Q&A
Popular questions
What makes you different from other WordPress teams? Can we start small and scale the website in phases? What happens after I submit the contact form? How much does a typical WordPress project cost? Do you provide ongoing maintenance and support after launch? How do you handle SEO and Google visibility for WordPress sites?
What makes you different from other WordPress teams?
We combine business strategy with disciplined technical delivery, which means SEO, Core Web Vitals, and scalability are planned from sprint one - not bolted on later. Each milestone has explicit quality criteria tied to measurable outcomes, so you always know what is delivered and why it matters to revenue. We work in short iterations with weekly progress demos, keeping feedback loops tight and surprises close to zero. Our team also handles structured data, accessibility, and multilingual architecture as standard scope, not optional extras. The result is a WordPress site that ranks, converts, and scales - not just a polished visual presentation.
Can we start small and scale the website in phases?
Yes, and in most cases phased delivery is the most effective rollout model for WordPress projects. We launch a focused first version that covers core business needs, cutting time-to-market by weeks or even months. Subsequent features are prioritised using real traffic data from Google Analytics and Search Console rather than assumptions. This approach lowers financial risk because each phase delivers measurable value before the next one starts. Clients typically see organic traffic growth and lead generation from the very first release, which funds further development naturally.
What happens after I submit the contact form?
After you submit the form, we respond within one business day with focused questions to clarify scope, timeline expectations, and business goals. Next, we prepare a practical proposal that includes a technical approach, a phased timeline, and a transparent cost estimate with clearly stated assumptions. Once both sides are aligned, we define implementation milestones, sprint priorities, and measurable success criteria. The entire process from first contact to project kickoff typically takes three to seven business days. This structured onboarding ensures ownership, accountability, and next steps are transparent from day one.
How much does a typical WordPress project cost?
Project cost depends on functional scope, integration requirements, and the level of customisation needed. A focused business website with SEO and responsive design typically starts in the low thousands, while a full WooCommerce store with payment gateways, ERP integration, and multilingual support can be significantly higher. We always provide a transparent estimate broken down by phase, so you can control spend at every stage. Payments are tied to concrete deliverables rather than time elapsed, which eliminates the risk of paying for unfinished work. On request, we prepare scope variants so the project fits the available budget without sacrificing the features that drive revenue.
Do you provide ongoing maintenance and support after launch?
Yes, we offer flexible maintenance plans that cover WordPress core and plugin updates, security monitoring, daily backups, and proactive performance management. Each plan includes a defined pool of hours for minor modifications and priority response to support requests. We monitor Core Web Vitals, uptime, and security logs around the clock, so issues are caught and resolved before they affect visitors or search rankings. Additionally, we run quarterly technical audits to keep the site aligned with the latest Google standards and browser requirements. This approach eliminates surprise emergencies and gives you predictable operational costs month over month.
How do you handle SEO and Google visibility for WordPress sites?
We treat SEO as a core architectural decision, not an afterthought applied after launch. During the design phase, we define URL structures, heading hierarchies, Schema.org structured data, and internal linking strategy to build topical authority from day one. Core Web Vitals - specifically LCP, CLS, and INP - are optimised as part of the build because Google uses them as direct ranking signals. We also prepare the site for GEO and AEO, ensuring visibility not just in traditional Google results but also in AI-powered answers from SGE, ChatGPT, and Perplexity. After launch, we continuously monitor rankings, indexing status, and organic traffic through Google Search Console to catch and fix issues before they impact business.
Need an FAQ tailored to your industry and market? We can build one aligned with your business goals.
Let’s discussLatest posts
From our knowledge base
Four plugin backdoors in a month: WordPress supply chain in 2026
Austin Ginder disclosed four WordPress.org plugin backdoors in 30 days, plus an author who ran a hidden update server for five years. What it means for NIS2 and DORA dependency maps.
Cyber Resilience Act + NIS2 + DORA: the 2026 compliance stack for headless WordPress
CRA covers products with digital elements. NIS2 covers entities. DORA covers financial entities. When all three apply at once, headless WordPress sits at the intersection. I sketch what the joint evidence package looks like in 2026.
DORA Article 28 ICT third-party risk: WordPress hosting and WAF supplier audit
Article 28 of Regulation 2022/2554 makes financial entities responsible for the ICT risk of every third-party they touch. I walk through the supplier due-diligence checklist I ship with WordPress engagements for banks and insurers in 2026.