Who: Mariusz Szatkowski, Senior WooCommerce Developer with 20+ 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
WooCommerce on a WordPress site is a viable e-commerce path when you want to keep editorial control of content while running checkout, inventory, and payment integrations on the same stack. As an expert WooCommerce Developer, I work end-to-end: custom theme development, REST/GraphQL API integrations, payment gateway wiring, and the perf work that keeps a 10k-product catalogue under a 1 s TTFB.
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 production-grade 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
Tight 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 production-grade and maximize your profits. I focus not only on making the store “work” but on making it sell faster and serve more customers concurrently.
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, simplify 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 senior WooCommerce developer
Where the technical depth pays back
Most WooCommerce work that lands on my desk is the same shape: an existing store assembled from too many plugins (typically 30+), a TTFB above 1.5 s on category pages, and a checkout that breaks under sustained load above a few hundred concurrent sessions. The fix is rarely “buy a faster cache plugin”. It usually requires reading the actual database query plan on wp_postmeta joins, replacing two or three plugins with custom code, and pruning the autoload table by 60-80 percent. That is the kind of work a senior does and a generalist outsources.
What investing in this work actually buys
The honest answer is: lower total cost of ownership, not a guaranteed conversion lift. Conversion gains depend on the funnel and the product. Performance gains are predictable: TTFB from 1.5-2 s down to 200-400 ms on category pages is a routine outcome of a senior rebuild, and Core Web Vitals scores follow. The compound saving is in maintenance cost, a store on 12 plugins with custom code where appropriate is cheaper to maintain over 3 years than the same store on 30 plugins, and the upgrade path is easier when WooCommerce ships a major version.
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 step-change 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?
- 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
What we actually do, and what we don’t claim
WordPress experience back to 2.x
Eighteen years of shipping WordPress and WooCommerce work, long enough to have seen the original Storefront, the Gutenberg rollout, the WP-CLI introduction, the REST API addition, and the FSE transition firsthand. The depth shows up in audits, not in marketing copy.
Performance work, not conversion promises
We do not promise a conversion lift, that depends on funnel, traffic source, and product. We do commit to specific Core Web Vitals targets (LCP under 2.0 s, INP under 200 ms, CLS under 0.05) on category and product templates, measured on a real device under real traffic, and we publish the before-and-after numbers.
Security as a configuration, not a plugin
Cloudflare WAF rules tuned per merchant, application passwords disabled where not needed, file-edit disabled at runtime, custom permissions audit at handoff. We do not install Wordfence and call it a day; the plugin floor is a starting point, not an architecture.
Direct senior access
The person you meet at discovery is the person at the keyboard at week six. There is no sales team between you and the implementation. Trade-off: we are not the cheapest, and we cannot scale to a fifty-person bench. If you need that, we will tell you on the first call.
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
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 2026?
Need an FAQ tailored to your industry and market? We can build one aligned with your business goals.
Let’s discuss
