Stable solutions for modern business

We design and build websites, applications and API integrations that actually work for your business.

Let's talkSee our work
Services

What we do

From your first website to the systems that hold the whole company together.

Websites

Fast, polished company websites and landing pages — design, build and SEO.

Web applications

Custom panels, B2B systems and tools tailored to how your company really works.

Mobile applications

Lightweight mobile apps and PWAs that work wherever your customers are.

E-commerce

Online stores and product catalogues — WooCommerce, OpenCart and custom builds.

Integrations & APIs

We connect the systems that need to talk to each other via APIs: payments (Stripe, PayPal, Tpay), couriers (InPost, DPD, GLS), ERP, PIM, invoicing. Less manual work, fewer errors.

AI-driven development

We build software with AI — with engineering discipline, code review and tests, not “vibe coding”. We also bring AI into your company’s processes.

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.

Lars Laj

Polish website of a playground manufacturer — product catalogue, architects portal and sales tools.

Lars Laj International

International site of the same brand in an entirely separate layout — a multilingual catalogue for export markets.

Invest Komfort

Previous website of a premium Tricity property developer — built and grown by us for nearly a decade.

  • WordPress
  • PHP
  • JavaScript

i-Rays

Marketing site for an IBM i monitoring product — blog and case studies on a headless CMS.

HAHS Clinic

Multilingual website of a Szczecin implantology and orthodontics clinic.

Follow Me

Website of a passenger transport company serving the Szczecin–Berlin route.

Follow Me — booking

Online booking system for airport transfers — route pricing, payments and an operator panel.

Omniscopy

Website of a digital experience analytics (session replay) product.

Omnilogy

Website of a company specialising in observability and cybersecurity in the agentic AI era.

AGS Golf Vacations

Website of a golf travel agency — packages, offers and enquiries from customers worldwide.

Platypus Agency

Website of a French e-commerce agency we regularly partner with on client projects.

Modus — CRM

Internal system

Custom CRM for a manufacturer of ART-NET and DMX control systems — clients, orders, production (the public website is not our work).

  • Laravel
  • Blade
  • MySQL

ZEF

Internal system

Company vehicle and trip records system — web panel, per-kilometre rate settlement and an Android app.

  • PHP
  • MySQL
  • Android

Contact widgets

Internal system

A platform of callback / form / e-mail widgets embedded on client websites — panel, API and statistics.

  • Laravel
  • SIP / telephony
  • REST API
  • SaaS

Product configurator

Internal system

Interactive product configurator for an Allegro marketplace seller’s store — payments and shipping wired up via APIs.

  • TypeScript
  • Allegro API
  • PayPal / Stripe / Tpay
  • InPost / DPD / GLS

Route optimizer

Internal system

Route planning tool for a service & logistics team — fewer kilometres, more visits.

  • JavaScript
  • Leaflet / OSM
  • HERE API

ERP / PIM sync

Internal system

Automated exchange of product catalogue and stock between a manufacturer’s systems.

  • PHP
  • REST API
  • CRON

Document automation

Internal system

A worker generating invoices and calendar (ICS) entries straight from sales systems.

  • Laravel
  • iFirma API
  • ICS / calendars

Discount system

Internal system

Discount application for a nationwide fuel station chain — codes, limits and partner settlements.

  • PHP
  • MySQL
  • REST API
  • Docker
About

Experience that compounds

Stelsoft is a software studio from Szczecin, Poland. For over a decade we have been building software for companies — from websites, through stores and custom panels, to API integrations that tie together sales, payments, logistics and accounting.

You work with us directly — no middlemen, no corporate overhead: you talk to the person who actually writes your code. Decisions happen fast and solutions fit your business exactly.

AI is part of our toolkit: it speeds up development, but every line of code passes engineering review — AI-driven development, not “vibe coding”.

years of experience
15+
delivered projects
100+
projects under ongoing care
6

Technologies we work in

  • PHP / Laravel
  • JavaScript / TypeScript
  • React
  • Astro
  • WordPress / WooCommerce
  • Node.js
  • MySQL / PostgreSQL
  • REST API / integrations
  • Stripe / PayPal / Tpay
  • InPost / DPD / GLS
  • AI tooling
Process

How we work

A transparent process — you know what is happening at every stage.

  1. 01

    Brief & analysis

    We get to know your business, goals and constraints. Concrete questions, zero jargon.

  2. 02

    Quote & plan

    Clear scope, timeline and costs — before we write the first line of code.

  3. 03

    Iterative delivery

    We regularly show working versions and react quickly to feedback.

  4. 04

    Launch & care

    Deployment, monitoring and growth. We don’t disappear after launch.

Contact

Let's talk about your project

Write or call — we usually reply within 24 hours.

Call usWrite