VisibilityInvest KomfortWebsite of a premium Tricity property developer, built and grown by us for nearly a decade — shown in its previous edition.- TypeScript / JavaScript
- React
- Astro
- Node.js
- AI agents
- LLM API
- RAG
- MCP
- WebMCP
- PHP
- Laravel
- WordPress / WooCommerce
- Contentful / Strapi
- MySQL / PostgreSQL
- REST API
- GraphQL
- Docker
- Stripe / PayPal / Tpay
- InPost / DPD / GLS
- Vue.js
- Symfony
- PrestaShop
- Magento
- Bootstrap
- Tailwind CSS
- Sass
- Vite
- Webpack
- React Native
- shadcn/ui
- Figma
Systems that run for years.A partner who stays.
A software house in Szczecin, Poland. For over 15 years we've built websites, stores and apps, connected them to the systems your company runs on and kept them running. We also work on your visibility where customers ask AI.
Services
Websites, stores, apps — and everything that connects and keeps them running
From your first website to AI automation and the systems that connect sales, stock and invoicing into one whole.
Websites
A company customers find on Google and trust at first glance.
Web applications
Your company's daily work in one panel — instead of spreadsheets and email.
we build
Mobile applications
Your offer in the customer's pocket — installable straight from the browser.
E-commerce
A store that sells on its own — from product page to payment and shipping.
we connect
Integrations & APIs
Data flows between systems by itself — no retyping, no errors.
AI: automation & visibility
Automation takes over the repetitive work — and customers who ask AI instead of a search engine find your business.
we maintain
Servers & hosting
A server you don't have to think about — patches go in right away, and you hear about a problem before your customers notice.
Ongoing care
After launch we stay: small changes, urgent fixes and new features — done by people who know your system inside out.
Solutions
Solutions that pay for themselves
Technology is a means, not the goal. What counts is what the companies we work with actually gain.
A brand that gets seenInquiries arrive even when nobody referred you — customers search, find you and get in touch.Lars LajLars Laj InternationalInvest Komforti-RaysHAHS ClinicAesthetic MedFollow MeOmniscopyOmnilogyAGS Golf VacationsPlatypus AgencyFraikinFDomesGenymotionAssethomeSee the work ↓15Sales and service non-stopA customer books and pays on Sunday evening — Monday morning the order is waiting in your panel.Follow Me — bookingStylusContact widgetsProduct configuratorDiscount systemSee the work ↓05Work that does itselfEach order turns straight into an invoice, a courier label and updated stock — the manual hours disappear.ERP / PIM syncDocument automationSee the work ↓02Operations under controlYou know at a glance who's on which job, what's waiting to be invoiced and where things are stuck — no calling around.ZEFModus — CRMSee the work ↓02
Portfolio
Selected work
Public launches plus the systems and API integrations quietly running in the background — from product catalogues, through payments and logistics, to ERP syncs.
VisibilityLars LajPolish website of a playground manufacturer — product catalogue, architects portal and sales tools.Visit site ↗ (opens in a new tab)
VisibilityLars Laj InternationalInternational site of the same brand in an entirely separate layout — a multilingual catalogue for export markets.Visit site ↗ (opens in a new tab)VisibilityInvest KomfortWebsite of a premium Tricity property developer, built and grown by us for nearly a decade — shown in its previous edition.
Visibilityi-RaysMarketing site for an IBM i monitoring product — with a blog and case studies edited in a modern CMS.Visit site ↗ (opens in a new tab)
VisibilityHAHS ClinicMultilingual website of a Szczecin implantology and orthodontics clinic.Visit site ↗ (opens in a new tab)
VisibilityAesthetic MedWebsite of a Szczecin plastic surgery clinic — the oldest in Western Pomerania.Visit site ↗ (opens in a new tab)
VisibilityFollow MeWebsite of a passenger transport company serving the Szczecin–Berlin route.Visit site ↗ (opens in a new tab)
Sales 24/7Follow Me — bookingOnline booking system for airport transfers — route pricing, payments and an operator panel.Visit site ↗ (opens in a new tab)
VisibilityOmniscopyWebsite of a product that records and replays user sessions, showing how visitors really use a site.Visit site ↗ (opens in a new tab)
VisibilityOmnilogyWebsite of a company specialising in observability and cybersecurity in the agentic AI era.Visit site ↗ (opens in a new tab)
VisibilityAGS Golf VacationsWebsite of a golf travel agency — packages, offers and enquiries from customers worldwide, integrated with a reservation system.Visit site ↗ (opens in a new tab)
VisibilityPlatypus AgencyWebsite of a French e-commerce agency we regularly partner with on client projects.Visit site ↗ (opens in a new tab)
OperationsZEFCompany vehicle and trip records system by Kedra Technologies — web panel, per-kilometre rate settlement and an Android app.Visit site ↗ (opens in a new tab)
VisibilityFraikinPolish website of the European leader in commercial vehicle rental — shown in its earlier edition.
VisibilityFDomesWebsite of an international brand of geodesic glamping and event domes — with a price list and dome configurator.Visit site ↗ (opens in a new tab)
VisibilityGenymotionWebsite of the professional Android emulator known to developers worldwide — shown in its earlier edition.
Sales 24/7StylusMade-to-measure pleated and roller blinds store from Szczecin — calculators, a configurator and nationwide delivery.Visit site ↗ (opens in a new tab)
VisibilityAssethomeSales portal for premium apartments from top developers — shown in its earlier edition.About
A studio, not a corporation
Stelsoft is a software studio from Szczecin, Poland. We have been building software for companies for over fifteen years — long enough to know which solutions will outlive the next trend, and which will need rewriting in two.
You work with us directly: no sales layer, no middlemen — from day one you talk to the team that actually builds your system. Decisions happen in a single conversation, and solutions fit your business exactly.
We don't disappear after launch. We run our clients' systems for years — and when the business changes, the software changes with it.
AI is part of our toolkit: it speeds up the work, but every line of code is reviewed by an experienced engineer before it reaches your business.
- years of experience
- 15+
- delivered projects
- 200+
- years of our longest ongoing partnership
- 11
- systems in our ongoing care
- 12
Process
How we work
A transparent process — you know what is happening at every stage.
Brief & analysis
We get to know your business, goals and constraints. Concrete questions, zero jargon.
Quote & plan
Clear scope, timeline and costs — before we write the first line of code.
Iterative delivery
We regularly show working versions and react quickly to feedback. We build with AI too — faster, with every change checked by tests and code review.
Launch & care
Deployment, monitoring and growth. We don’t disappear after launch.
FAQ
Frequently asked questions
The things companies ask us most often before we start working together.
How much does a website cost?
It depends on the scope — a simple company website is one thing, a store with payment and logistics integrations quite another. That’s why we start with a short brief, after which you get a clear quote and timeline — before we write the first line of code.
How long does a project take?
A simple company website usually takes a few weeks. A store or an application with integrations — from a few weeks to a few months. We set a concrete timeline at the quoting stage and regularly show working versions.
Do you optimize websites for AI search (ChatGPT, Google Gemini, Microsoft Copilot, Claude)?
Yes. We check whether AI bots can reach your site at all (robots.txt, CDN/WAF settings), shape content so it is easy to cite, and take care of structured data. Classic SEO remains the foundation — a large share of AI-search citations comes from the top organic results. Every month you get a short report: which AI assistants mention your business, and for which questions.
Will you improve the SEO of my existing website?
Yes — you don't need a new site for that. We start with an audit: indexing, speed (Core Web Vitals and your PageSpeed Insights score), content structure, structured data and internal linking. You get a prioritised list of issues, then we implement the fixes — on your hosting and in your CMS, WordPress included. New and changed pages are submitted immediately via IndexNow (Bing and other engines) and Google Search Console. We don't promise rankings; we show you in Search Console and PageSpeed Insights what changed.
Can my website work with AI agents?
Yes. Today we can already connect your systems to AI assistants through an MCP server — ChatGPT, Claude or Microsoft Copilot can then check an order status or prepare a document in your ERP. WebMCP is the next step, for the website itself: a draft specification (W3C Community Group, tested in Chrome) that lets AI agents use its features — forms, search, bookings. We implement it as a pilot and say so plainly: it’s an investment in what’s coming, not a finished standard.
Do you only work in Szczecin?
No — we work remotely with companies across Poland and abroad. In and around Szczecin we’re happy to meet in person too.
Do you take over existing websites and systems?
Yes, we do it often. We review the code, sort out hosting and deployments, then keep the system growing — some projects have run this way with us for years.
Who looks after the server once the project is live?
If you want us to — we do. As part of ongoing care we update PHP and the operating system, monitor uptime and test the backups. Why it matters: on 21 October 2026 PHP shipped fixes for two critical flaws (known as php2shell, CVE-2026-109618 and CVE-2026-109619) that allowed remote code execution and affected every version from 5.4 to 8.5.11 — in practice almost every PHP site running that day. No configuration setting fully protected against them — only the update did. Servers in our care receive such patches on the day they are published.
Contact
Let's talk about your project
A short message is enough — we'll come back with specifics, usually within 24 hours. And then we stay for years.