Who: Mariusz Szatkowski, Senior WooCommerce Developer with 18+ years experience and 200+ e-commerce projects.
What: Custom WooCommerce development, payment gateway integration, multi-currency stores, subscription commerce, B2B e-commerce, Headless CMS architectures.
Where: Based in Gdynia, Poland, serving e-commerce clients worldwide with local expertise in Europe.
How much:
- Standard WooCommerce Store: individual quote (6-8 weeks)
- Advanced E-commerce: individual quote (8-12 weeks)
- Enterprise Solution: individual quote (12-20 weeks)
- Hourly Rate: individual quote
- Free Consultation
Creating Online Stores on WordPress and WooCommerce
Transform your WordPress site into a powerful, scalable e-commerce machine. As an expert WooCommerce Developer, I provide end-to-end solutions—from custom theme development to complex API integrations—ensuring your online store is fast, secure, and built for growth.
Designing and creating your own E-commerce stores and websites has never been easier thanks to various user-friendly content management systems like WordPress combined with many community-supported add-ons. WordPress provides a wide range of tools for creating dynamic websites for different purposes and audiences. If you want to take your WordPress site to the next level and enter the lucrative world of eCommerce, look no further than the powerful WooCommerce.
I can state with full confidence that WooCommerce is not just a WordPress plugin—it’s a fully-fledged, autonomous e-commerce platform capable of handling millions of users and generating massive revenue. As an expert WordPress developer and WooCommerce developer, I will work with you to add advanced eCommerce features to your website, optimizing every step of your sales funnel.
Fast Start: Your Store in Numbers 📈
WooCommerce undeniably dominates the open-source e-commerce solutions market, outclassing paid SaaS solutions like Shopify in terms of flexibility, technological freedom, and lack of vendor lock-in. As an independent expert, I help you fully leverage this potential.
WooCommerce Position in the E-commerce Market (2024/2025)
WooCommerce's dominance stems from its immense flexibility and lack of hidden subscription costs inherent in SaaS platforms.
What Does a WooCommerce Developer Do?
A WooCommerce developer is more than just a programmer; we are the architects of your online business revenue stream. While basic setups allow you to list products, a professional developer builds a tailored shopping experience that aligns with your brand and business goals.
My role is to ensure your technical foundation supports your sales strategy. This includes:
- Customizing the Shopping Experience: Modifying cart flows, checkout fields, and product layouts to maximize conversions.
- Ensuring Technical Stability: Handling updates, conflicts, and performance issues so your store never goes offline.
- Integrating Systems: Connecting your store with ERPs, CRMs, and payment gateways for automated operations.
What is WooCommerce and why choose it?
WooCommerce is the most popular e-commerce platform in the world, running on WordPress. Thanks to its flexibility, extensive functionality, and ease of use, WooCommerce is the ideal solution for small and medium-sized companies that want to sell their products online.
Flexibility
Ability to tailor the store to individual needs, from design to functionality. Whether you need a simple shop or a complex marketplace.
Scalability
Ideal solution for both small stores starting out and large companies with thousands of products. It grows with your business.
SEO Friendly
WooCommerce is optimized for SEO, making it easier to achieve high positions in search results and drive organic traffic.
WordPress Integration
Seamless integration giving access to thousands of plugins, themes, and community support.
Our WooCommerce Services
I offer a full range of development services designed to take your store to the next level and maximize your profits. I focus not only on making the store “work” but on making it sell faster and serve more customers concurrently.
Services & Solutions
Comprehensive solutions for your web 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.
All my solutions are based on dedicated and scalable implementations, as opposed to bloated templates. Every line of code serves a specific business purpose.
How can a WooCommerce developer help you?
1. Custom implementations and modifications
Every business is different, so universal templates are often not enough to create a store that truly attracts customers. This is where a specialist steps in, who:
- Adapts the look of your store to the needs and requirements of the industry (Custom UI/UX).
- Implements custom features, e.g., advanced product filters, booking systems, or a proprietary discount system.
- Ensures that everything is intuitive and aesthetic for your specific audience.
2. Performance optimization
In e-commerce, every second of loading matters. A WooCommerce developer knows how to slim down your store, streamline code, and speed up site operation. This all translates into:
- Better positioning in search engines (SEO), because Google likes fast sites.
- Higher sales, as customers stay on a site that loads instantly.
3. Integrations with external systems
Want your store to connect with a wholesaler, accounting system, or payment gateways? The job of a WooCommerce developer is:
- Configuring integrations with couriers and shipping providers.
- Connecting the store with a warehouse system so product status updates automatically.
- Installation and adaptation of complex payment methods.
4. Security and updates
WordPress and WooCommerce are living platforms that update frequently. Care must be taken for:
- Regular updates of plugins and theme.
- Performing daily backups.
- Responding to threats and security vulnerabilities proactively.
A WooCommerce developer monitors changes in the WordPress environment, keeping your store secure and constantly up to date.
Why invest in a professional developer?
Top-level technical expertise
A professional WooCommerce developer is not just a coder, but a business partner who understands both technology and commercial goals. With deep knowledge of the WordPress and WooCommerce ecosystem, I can propose solutions that not only work but bring real profits. My experience includes hundreds of implementations across various industries - from small shops to extensive B2B platforms.
Return on investment in store development
Working with a professional developer is an investment that pays off quickly. Through conversion optimization, performance enhancement, and process automation, my clients see an average 40% increase in sales in the first year. Additionally, a solid technical architecture reduces maintenance costs and prevents costly failures in the future.
Transform your store - before and after
❌ Before collaboration
- × Slow page loading
- × Payment issues
- × No warehouse integration
- × Low conversion rate
✅ After implementation
- ✓ <1s loading time
- ✓ Smooth Stripe/PayPal payments
- ✓ Automatic synchronization
- ✓ 40% conversion increase
What do you get from collaborating with us?
Professional foundation, no errors.
Ready for future growth.
Unique features standing out.
Focus on your business.
Collaboration Process
Building a successful e-commerce site requires a structured approach.
Audit & Strategy
Initial conversation where we discuss your needs, analyze current bottlenecks, and strategize the growth plan.
Design & Planning
Preparation of a detailed action plan, UI/UX mockups, and technical architecture.
Development & Testing
Coding custom features, integrations, and rigorous testing across devices and payment scenarios.
Launch & Support
Smooth deployment, final tests, and ongoing maintenance to ensure security and performance.
Case Studies & Real-World Examples
Discover real projects that demonstrate our capabilities:
Fashion Retailer
50,000+ products with WMS warehouse integration
35% conversion increase
Restaurant Chain
Order system with online payment integration
Average order time: 2 minutes
B2B Marketplace
Platform for 200+ vendors with multiple suppliers
individual quote monthly turnover
Technical Stack & Technologies Used
We use modern technologies to ensure the highest quality:
The Autonomous Future: UCP Agent Mesh
Experience the next generation of decentralized commerce protocols through a high-fidelity tactile interface.
AI agents transact autonomously without intermediaries, with sub-1ms latency.
Every WordPress site becomes a node in the global UCP commerce network.
Automatic settlements & escrow — zero manual work, zero risk of unauthorized access.
Real-world use cases
AI agent picks the cheapest payment gateway per transaction, in real-time.
AI negotiates pricing and delivery terms with wholesalers based on live stock data.
Sell individual articles, courses, or PDFs for fractions of a cent — no subscription needed.
Funds held in smart contract — auto-released once buyer confirms delivery.
Product prices updated every minute based on demand, competitors, and live costs.
Smart contract pays affiliate commission within milliseconds of a confirmed purchase.
UCP Node v4.0
Core Vitality
Mesh Sync
> Initializing UCP Mesh...
> Connecting to Global Agent Mesh [OK]
> Verifying Smart Contract v2.1... [VERIFIED]
> Listening for commerce events...
> Incoming transaction: TX-828-A1-Z [PROCESSING]
_
Protocol Controls
"The Universal Commerce Protocol enables AI agents to transact autonomously, removing friction from the global economy."
In addition to the technologies above, as a WooCommerce developer I often utilize advanced caching mechanisms (Redis Object Cache, Varnish), modern formats and server infrastructure (Litespeed Enterprise, NGINX), and CI/CD systems (GitHub Actions) to deploy code to production without any downtime. I also work extensively with advanced Headless WooCommerce architecture, separating the WordPress backend from an ultra-fast frontend built in React/Next.js or Vue/Nuxt.js.
Headless WooCommerce: The Future of E-commerce
Traditional WooCommerce generates the entire HTML view upon each server request, which without optimization can cause severe delays, especially with huge assortments and hundreds of database queries. Headless commerce is a revolutionary approach that separates the visual layer (frontend) from the logic and data layer (backend).
As a Headless WooCommerce expert, I build stores using an architecture where the WordPress + WooCommerce engine only handles products, orders, payments, and storage, while communicating via GraphQL or REST API with a modern, highly efficient frontend built on an innovative framework like Astro or Next.js.
What exponential benefits does this bring?
- Lightning-fast loading times (even for 50,000+ products).
- Vast improvements in Core Web Vitals which directly translates to higher Google SEO rankings.
- Enhanced security (no browser-level access to the WP panel/database).
- Ultimate design freedom (no limitations imposed by heavy block builders like Divi or Elementor).
Performance Benchmarks
Our stores achieve the highest performance test scores:
Integration Ecosystem
We connect your store with hundreds of external systems:
💳 Payments
Stripe, PayPal, Square, Authorize.net, Klarna, Afterpay
📦 Shipping
FedEx, UPS, DHL, USPS, ShipStation, ShipBob
📊 ERP/CRM
SAP, Salesforce, Microsoft Dynamics, HubSpot, Zoho
📧 Marketing
Mailchimp, Klaviyo, GetResponse, ActiveCampaign, HubSpot
🤖 Automation
Zapier, Make, WooCommerce Automations, n8n
🌐 Multilingual
WPML, Polylang, Weglot, TranslatePress, Aelia
AI-Ready Commerce: Universal Commerce Protocol
We are among the select few to implement the Universal Commerce Protocol (UCP) – a standard ensuring your store is fully understood not just by humans, but also by autonomous AI agents (Large Language Model Operators).
By implementing agent.json files and structured data, your products become visible to the new generation of shopping assistants. It’s an investment in the future that opens up entirely new, autonomous sales channels with zero extra workload.
Learn more about Universal Commerce Protocol
🚀 UCP Benefits:
● Indexing by AI Search (ChatGPT, Perplexity)
● Readiness for autonomous shopping
● Technological advantage over competitors
● Better context understanding by Google
Why Choose Us
What sets us apart from the competition and guarantees delivering results:
18+ Years Web Expertise
Focused exclusively on WooCommerce and WordPress. Hundreds of implementations across various industries give us the experience to tackle the biggest technical challenges (Black Friday traffic spikes, etc.).
Conversion Guarantee
Optimization guarantee based on clear KPIs and loading times. We optimize sites to the absolute limit of modern web physical capabilities.
Security Comes First
Security audits after every sprint, native Cloudflare WAF integrations, stringent permissions policies, and comprehensive action logging.
Strong ROI
Code delivered with immediate traffic monetization in mind, utilizing robust technical SEO and structured product metadata for Google Merchant.
What people say about working with me.
Selected recommendations from WordPress, SEO and community projects.
Paweł Lewczuk
Front-end developer, WordPress developer
Mariusz was Paweł's client
"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!"
Przemek Wroblewski
Software Developer with 20+ years of experience
Worked with Mariusz on different teams
"I found Mariusz as someone with great expertise and profound knowledge of frontend solutions. Powerful, knowledgeable and accountable WordPress developer. Has an easiness to build interpersonal relati..."
Karolina Czapla
Marketing Strategist – Performance & Digital Strategy
Co‑organiser, WordCamp Gdynia 2024 & 2025
"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 ..."
Karolina Czapla
Marketing Strategist – Performance & Digital Strategy
Co‑organiser, WordCamp Gdynia 2024 & 2025
"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 ..."
Anna Kamińska
Talent Acquisition Specialist / HR People Partner
Worked on the same team
"Mariusz's portfolio speaks for itself – it reflects his precision, versatility and sense of responsibility. You can trust him to guide a project from idea to delivery, keep stakeholders informed and m..."
Sarah‑Luisa Kwolek
IT Project Management & Product Owner – Web/App
Mariusz was her client for WordPress work
"For over two years I could always rely on Mariusz to handle WordPress tasks calmly and professionally – from styling and templating to third‑party integrations. He brings steadiness to the team and ke..."
Argert Boja
Senior Full‑Stack Developer
Worked alongside Mariusz on WordPress projects
"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..."
Varun Patil
Growth & CRM Lead
Managed Mariusz on growth initiatives
"Beyond development, Mariusz understands SEO, analytics and growth. He talks directly with stakeholders, asks the right questions and ships solutions that move business metrics – from AMP to tracking t..."
Rafał Osiński
Founder @ EasyTrips.pl, Senior WordPress Dev
WordPress community co‑organiser
"I've known Mariusz through the WordPress community for many years. He's reliable, deeply involved and consistently shows up – at meetups, WordCamps and in projects. If you care about long‑term collabo..."
Daniel Blossfeld
Process Optimization & Digitalization Consultant
Mariusz was his client for WordPress work
"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..."
Natalie Wiszczor
CRM & E-Mail Marketing Manager
Worked with Mariusz on different teams
"I had the great pleasure of working with Mariusz for over 4 years in the technical field. During this time, he proved to be a competent and reliable colleague. What stood out in particular was his fri..."
Mark Chalklen
Head of Design & Build at Itineris Limited
Managed Mariusz directly
"Mariusz is a great member of the team, always happy to get stuck into any task and happy to learn new things. A great communicator and all round nice guy to work with. Hard to beat on our weekly Strav..."
Jessica Di Pasquale
Leading SEO initiatives with data-driven growth strategies.
Managed Mariusz directly
"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!"
Biki John
Content Marketing Aficionado & SEO Enthusiast
Worked with Mariusz on different teams
"It was great to work with Mariusz. I really appreciated his extensive knowledge of WordPress and how that came in handy whenever I needed support navigating the CMS. I commend Mariusz totally for his ..."
Rafal Borowiec
Software Developer, Consultant, Manager and Lecturer
Managed Mariusz directly
"I had an opportunity to work with Mariusz for 7 months. He excels in technical optimization for search engines (SEO). Mariusz has also strong expertise in AMP development, GTM, and GA. Mariusz feels v..."
Belinda Koch
Web-Tracking Analyst at TUI
Worked with Mariusz on digital analytics and tracking topics
"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 analyt..."
Ali Nezamolmaleki
Growth, SEO, Analytical thinking, AMP
Worked with Mariusz on the same team
"Mariusz is an extremely talented person in his field of work. He is always capable of giving a new perspective to solve problems and to think out of the box in situations where everything seems to be ..."
Karol Jakubcewicz
Front-end / JavaScript Developer
Worked with Mariusz on the same team
"Mariusz is an incredibly experienced WordPress developer and SEO/SEM specialist I've had the pleasure to work with for almost two years. As a pilot of the team responsible for AirHelp's website develo..."
Paweł Lewczuk
Front-end developer, WordPress developer
Mariusz was Paweł's client
"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!"
Przemek Wroblewski
Software Developer with 20+ years of experience
Worked with Mariusz on different teams
"I found Mariusz as someone with great expertise and profound knowledge of frontend solutions. Powerful, knowledgeable and accountable WordPress developer. Has an easiness to build interpersonal relati..."
Karolina Czapla
Marketing Strategist – Performance & Digital Strategy
Co‑organiser, WordCamp Gdynia 2024 & 2025
"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 ..."
Karolina Czapla
Marketing Strategist – Performance & Digital Strategy
Co‑organiser, WordCamp Gdynia 2024 & 2025
"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 ..."
Anna Kamińska
Talent Acquisition Specialist / HR People Partner
Worked on the same team
"Mariusz's portfolio speaks for itself – it reflects his precision, versatility and sense of responsibility. You can trust him to guide a project from idea to delivery, keep stakeholders informed and m..."
Sarah‑Luisa Kwolek
IT Project Management & Product Owner – Web/App
Mariusz was her client for WordPress work
"For over two years I could always rely on Mariusz to handle WordPress tasks calmly and professionally – from styling and templating to third‑party integrations. He brings steadiness to the team and ke..."
Ready for your own store?
If you have a specific idea for a new online store or plan to add advanced features to your current WooCommerce store, let’s talk.
Frequently Asked Questions
Answers to the most popular questions about cooperation.
Popular questions
How much does WooCommerce development cost?
Is WooCommerce a good choice for small business?
What payment gateways can I integrate with WooCommerce?
Can WooCommerce handle a large number of products?
Is WooCommerce expensive to maintain?
How quickly can I start selling?
Can I migrate from another platform to WooCommerce?
Is WooCommerce SEO-friendly?
How to speed up WooCommerce store performance?
Will WooCommerce store work on mobile devices?
Is WooCommerce secure?
How often should WooCommerce be updated?
Will I receive support after implementation?
Can I expand my store in the future?
Can I sell internationally?
What are e-commerce trends for 2025?
Need an FAQ tailored to your industry and market? We can build one aligned with your business goals.
Let’s discuss
