Product engineering
End-to-end web apps that go from idea to revenue. I own the whole stack — UI, API, data, infra — so there are no handoff gaps.
- React + TypeScript front-ends
- .NET / Node back-ends
- Ship-first, polish-as-you-go
Available for remote contracts & freelance
I build software that ships, scales, and makes money.
I'm Marc Stan — a senior full-stack engineer and founder. I run the engineering behind a store doing 150K visits a month, and I build the same calibre of product, performance and automation work for clients.
● Las Palmas · Remote-first
- monthly visits engineered
- 150K+ monthly visits engineered KAMAR storefront
- ROAS on paid ads
- 9+ ROAS on paid ads at 1–1.2K PLN/day
- years in production
- 6+ years in production shipping, not prototyping
- products & platforms
- 5 products & platforms built end-to-end
What I do
Four things I do exceptionally well
I'm a generalist who goes deep where it counts. Most engagements are some mix of these — design, build, deploy, and keep it running.
WooCommerce & WordPress performance
I make WooCommerce stores fast and cheap to run. Custom plugins, server tuning, and Core Web Vitals work that survives real traffic.
- OpenLiteSpeed + Redis + OPcache
- Custom PHP plugins & cron
- Core Web Vitals & SEO
Automation & integrations
The boring work that quietly saves hours every day — order pipelines, invoicing, stock sync, supplier feeds — wired together and left to run.
- n8n pipelines & webhooks
- REST / API integrations
- Cron & queue workflows
Enterprise .NET / React
Modernising serious business software. ERP systems, CQRS refactors, and typed React front-ends that a team can keep building on.
- ASP.NET MVC → CQRS/MediatR
- React Query / Zodios / TS
- Reusable CRUD & form tooling
Selected work
Real projects, real numbers
No mockups or made-up case studies. These are products and platforms I actually built and run — with the metrics and stack that back them up.
KAMAR Zabawki
Co-founder & DevOps · 2023 — present
A WooCommerce toy store I co-run and keep fast.
I co-founded and run the engineering behind a high-traffic Polish toy store. I migrated it to a Hetzner CX53 VPS (16 vCPU / 32 GB) on OpenLiteSpeed with Redis and OPcache, and wrote the custom PHP plugins and cron jobs that handle order processing, stock sync, supplier integrations and email workflows. I also built an end-to-end automation system that replaces manual dropshipping work: the supplier offers no API, so it drives their website directly to place orders automatically — a headless browser workaround that runs unattended. Paid acquisition runs at 9+ ROAS on Facebook at 1–1.2K PLN/day.
- WooCommerce
- PHP
- OpenLiteSpeed
- Redis
- OPcache
- n8n
- Hetzner
- 100–150K
- visits / month
- 9+
- ROAS on Facebook
- Zero-touch
- supplier ordering
Full Stack Wizard
Founder · 2025 — present
My freelance & contract practice.
End-to-end web apps for clients in React/TypeScript, .NET and WordPress, plus the automation and infrastructure to run them. API integrations, n8n and webhook pipelines, and Hetzner cloud infra (OpenLiteSpeed, Redis, OPcache, backups) wired up with CI/CD and Docker.
- React
- TypeScript
- .NET
- WordPress
- Docker
- n8n
- Full-stack
- design → deploy
- CI/CD
- Docker, automated
- Cloud
- self-hosted infra
WooPlugs
BuildingFounder · In progress
Battle-tested store tooling, productized.
I am turning the WooCommerce performance tooling I built for my own store into commercial plugins. ShopTune focuses on backend performance; OrderHQ is an orders workspace (coming soon). Real tools, proven on real traffic before they ship.
- WooCommerce
- PHP
- Astro
- Cloudflare
- ShopTune
- backend performance
- OrderHQ
- orders workspace · soon
Kanarix
Founder · 2025 — present
A comprehensive solution for the vacation rental business.
An all-in-one platform for vacation rental businesses — bringing bookings, guest management, channel sync and operations together in one place, built on the same stack and infrastructure I run for my own projects.
- React
- TypeScript
- Automation
- All-in-one
- vacation rentals
- Bookings
- guests & operations
Enterprise ERP (React & .NET)
Full-stack engineer · 2019 — 2025
Serious business software, modernised.
Years of building and modernising ERP systems on ASP.NET MVC. I refactored backends toward CQRS/MediatR and led the React Query / Zodios / TypeScript front-end modernisation — building reusable file managers, form creators and recursive CRUD components on DevExtreme. Earlier, I wrote CI/CD-integrated end-to-end test suites in Selenide (Java) for secure banking systems.
- .NET
- ASP.NET MVC
- React
- DevExtreme
- Selenide
- CI/CD
- CQRS
- MediatR refactors
- Typed
- React Query + Zodios
- Tested
- E2E in CI/CD
Tech stack
The tools I reach for
Chosen for shipping and longevity, not novelty. I run all of this in production today.
Front-end
- React
- TypeScript
- Astro
- React Query
- Zodios
- Tailwind
Back-end
- .NET
- ASP.NET MVC
- Node
- PHP
- CQRS / MediatR
- REST APIs
Commerce & CMS
- WooCommerce
- WordPress
- Custom plugins
Data
- SQL / MySQL
- Firebase
- Redis
Infra & DevOps
- Linux
- Hetzner
- OpenLiteSpeed
- Docker
- CI/CD
- OPcache
Automation & QA
- n8n
- Webhooks
- Selenide (Java)
- Location
- Las Palmas de Gran Canaria, Spain
- Languages
- Polish (native) · English (advanced) · Spanish (beginner)
- Education
- B.A. in Sound Production — a signal-processing background that still informs how I think about precision and systems.
About
An operator who builds his own tools
I am an operator who builds his own tools. I co-run a WooCommerce store doing six figures of monthly traffic, which means I do not get to hide behind a clean staging environment — the code I write runs against real customers, real money and real ad spend every day.
That pressure shapes how I work. I care about systems that stay fast, infrastructure that stays cheap, and automation that quietly removes work instead of adding it. When something I build for my own store proves itself, I productize it — that is how WooPlugs started.
Before going independent I spent years on enterprise React and .NET — modernising ERP systems toward CQRS, building typed front-ends, and writing automated test suites for secure banking software. I write code that is meant to be maintained, not just demoed.
Marc Stan is the working name of Marcin Stańczyk — senior full-stack engineer, based in Las Palmas de Gran Canaria.
Let's build
Have a project that needs to ship and scale?
I take on a small number of remote contracts and freelance engagements at a time. Tell me what you're building — I'll reply with honest thoughts on how I'd approach it.
Available for remote contracts & freelance · Las Palmas de Gran Canaria, Spain