Cautus SistemiCautus Sistemi

Software development

Web application development.

SaaS platforms, webshops, dashboards and internal tools. We work in Next.js and React and carry an application from the first sketch to production, then onwards as it grows.

What we build

A web application runs in the browser. Nobody installs anything, and you maintain one version in one place. That covers very different projects, so the first thing we do is work out which one you actually need.

  • SaaS platforms with subscriptions, user accounts and billing.
  • Webshops with a catalogue, cart, online payment and an admin panel.
  • Dashboards and internal tools that replace spreadsheets and manual steps.
  • Marketing and landing pages whose job is to bring in enquiries.

How a project runs

We start with a call about what the application has to do and who will use it. On that basis you get a written proposal with scope, timeline and price.

Development is iterative. We do not disappear for three months and return with a finished product: you see progress regularly on a staging URL, and your feedback goes in while changes are still cheap. When it is ready we deploy it and hand you the credentials.

The stack

We work in the same stack we use for our own products: Next.js and React with TypeScript on the front end, Node.js or Python on the back end, PostgreSQL or Firebase for data, Vercel or Google Cloud for hosting.

That choice is not fashion. Next.js renders on the server, so pages are fast and search engines read them properly, and TypeScript catches mistakes before your users do. Using one stack also means that in five years the application will not be maintained by someone meeting an exotic technology for the first time.

Working across timezones

We are in Central European Time. That overlaps the whole EU working day and most of the UK one, so questions get answered the same day rather than the next. Documentation, tickets and calls are in English.

After launch

A web application is not a finished project, it is a product that lives. We offer a maintenance contract covering hosting, security updates and backups, and when a new feature is needed it is built by the team that built the application.

From the portfolio

Web applications we have built.

Evolution Power Tools — webshop

Webshop

Visit

Evolution Power Tools

The official Croatian webshop for Evolution Power Tools. Bilingual catalogue with search and product variants, Stripe checkout, shipping priced by weight and zone, and an admin panel for products, orders, promotions and enquiries.

Read the case study
Klinika Hub — saas platform

SaaS platform

Visit

Klinika Hub

Clinic management platform with online booking, patient records and WhatsApp automation.

Staxo News — web platform

Web platform

Visit

Staxo News

A daily crypto digest in five languages. Each morning an AI reads dozens of sources, picks the stories that actually moved something and rewrites them in plain language, without jargon or hype. Subscribers get the summary in their inbox and know where the market stands in a few minutes.

Questions

FAQ

How long does a web application take?+

A simpler website or landing page is done in two to four weeks. A larger application such as a SaaS product, webshop or dashboard takes two to four months. The exact timeline comes out of the requirements analysis.

What does it cost?+

Price follows scope: how many screens, which integrations, how complex the logic is. After a first call at no charge you get a written quote with price and timeline, so you know exactly what you are buying before you pay anything.

Can we extend it later?+

Yes, that is how we build our own products. The application is structured so features can be added without breaking what already works, and the code and the credentials are yours.

Do you work with clients outside Croatia?+

Yes. This work is remote and the timezone does most of the heavy lifting. We invoice as a Croatian limited company with an EU VAT ID, so for VAT-registered clients in another member state the reverse charge applies.

Contact

Have an idea? Let's talk.

Tell us about the project. For smaller ones we send an analysis and a quote within a few days. For larger and more complex work we agree the scope of that analysis with you first.