Software development
We build products, not one-off projects.
Web and mobile applications, CRM and AI systems, from the first idea to a product in production. We build our own products too, so we run development as a partner rather than a contractor on one project.
What we build
Four things, properly.
01
Web applications
SaaS platforms, webshops, dashboards and internal tools. Next.js and React, from first sketch to production.
02
Mobile applications
iOS and Android from one Flutter codebase, including the store submissions nobody enjoys.
03
CRM and business systems
Systems cut to the process you actually run, replacing spreadsheets and manual re-entry.
04
AI automation
Document handling, summaries and repetitive answers, automated where the numbers support it.
Working with us
How a project runs.
01
Call
What the software has to do, who uses it, and what it is competing against today.
02
Written proposal
Scope, timeline and price in writing, before anyone commits.
03
Iterative build
Progress on a staging URL you can open, not screenshots in a status email.
04
Launch and after
Deployment, credentials handed over, and maintenance if you want it.
The stack
Next.js and React with TypeScript on the front end, Node.js or Python on the back end, PostgreSQL or Firebase for data, Flutter for mobile, Vercel or Google Cloud for hosting.
It is a deliberately boring list. These are the tools we use for our own products, which means we know their failure modes, and it means that in five years your application will not be maintained by someone meeting an exotic framework for the first time.
Portfolio
Eleven products, our own among them.
Restaurant Management Platform
VisitPatrono
Operations platform for a restaurant, in the browser and on the phone. The owner sees where the place stands every day: revenue, costs and supplier invoices in one place, food cost per dish with margins, shift schedules staff open on their phones, and HACCP records ready for an inspection.
Read the case study
Webshop
VisitEvolution 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
Mobile app
VisitStaxo
Crypto trading simulator for iOS and Android. A virtual portfolio priced off the real market, so people learn to trade without risking their own money. Courses with quizzes, XP and levels, leagues and leaderboards, and a full history of every trade.
Read the case study
Business system
Agency CRM
CRM for a consultancy working with restaurants and food brands. Tracks clients and their venues, consolidates data from delivery platforms, and produces reports, a planner and analytics.
SaaS platform
VisitKlinika Hub
Clinic management platform with online booking, patient records and WhatsApp automation.
Web platform
VisitStaxo 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.
Website
VisitValens Medical
Website for a physiotherapy clinic, with online booking and search optimisation.
Prediction markets
Katsu Markets
Aggregator for prediction markets. Live prices, portfolio and alerts from several exchanges in one place.
Hackathon · AI trading
VisitStaxo Trading Agent
Autonomous AI trading agent running on Kraken. Six signals, self-adjusting weighting, risk gates and daily Telegram reports. Built for the Lablab.ai AI Trading Agents hackathon.
Trading bot
Moneta
Automated crypto trading system with technical analysis, risk management and daily reports.
Trading bot
Vulture
Solana memecoin trading bot with automated screening, position tracking and Telegram reports.
Questions
FAQ
Do you work with clients outside Croatia?+
Yes, and the timezone is why it works. We are in Central European Time, so the working day overlaps the whole EU and most of the UK. Documentation, tickets and calls are in English.
How do you invoice an EU client?+
CAUTUS SISTEMI d.o.o. is a Croatian limited company with an EU VAT ID, so you get a regular EU invoice. For clients VAT-registered in another member state the reverse charge applies.
Who owns the code?+
You do. Code, database and credentials are handed over, and handover documentation is part of delivery rather than something you have to negotiate at the end.
What does a project cost?+
It follows scope. After a first call at no charge you get a written quote with price and timeline. For smaller projects the analysis takes a few days; for larger ones we agree the scope of that analysis with you first.
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.