Custom Software and AI Development
Iterus builds custom web applications, AI integrations and connections to Czech systems (ARES, data boxes, NEN) on a project basis. We use Next.js, TypeScript and PostgreSQL/Supabase; AI is integrated through the Claude and OpenAI APIs. Five services have their own detail page below; the rest we deliver as part of a project.
What do we deliver?
- Web applications (Next.js / React / TypeScript)
- Backend and APIs (Node.js / TypeScript, Python / FastAPI)
- Databases and data pipelines (PostgreSQL / Supabase)
- Desktop applications (Electron)
- AI integration: Claude / OpenAI APIs, RAG, agents, MCP servers
- Process automation (n8n, custom agents)
- NinjaTrader 8 / NinjaScript (C#) tooling
- Local / on-prem LLM deployment (GDPR)
- Czech system integrations: ARES, data boxes, contract registry, NEN, Fakturoid, GoPay/Comgate
- Mobile apps (React Native / Expo)
A large part of what we offer runs in production in our own products — three have a case study with repository numbers (two live, one pre-launch) on the References page.
What we don't do
We would rather limit scope than promise something we can't do well. This list reflects where we stand today and may change over time.
- embedded/firmware
- banking core systems
- large enterprise Java/.NET migrations without a dedicated team
- penetration testing and security audits
- medical devices (MDR)
Frequently asked questions
Do you also build mobile apps?
Yes, in React Native / Expo — a native app for iOS and Android, not a website wrapped in an app. The mobile layer calls the web API we build ourselves; that is exactly how Legacy You (pre-launch) is built, with the web and the mobile app sharing one backend.
Will you take over a project started by another vendor?
Yes. We review the code and tests first to see what state it is in — without that we give no estimate to finish. That review is typically the work of the paid discovery for 25,000 CZK, deducted from the price of finishing: you learn what holds and what needs rewriting, and only then decide whether to continue with us.
What do you not do?
Banking core systems, penetration testing and security audits, medical devices (MDR), embedded-device development and large enterprise migrations without a dedicated team — the list reflects where we stand today. We would rather limit scope up front than promise work whose quality we could not stand behind.