Product design & engineering
Ideas, shipped to production.
You work directly with the designers and engineers building your product, from the first sketch through launch and every release after it. No account managers in between.
Services
What we build
Design, engineering and hosting under one roof, so nothing gets lost in a hand-off between agencies.
Web apps
Fast, accessible web applications and platforms, from customer portals to internal tools.
Mobile apps
Native-feeling iOS and Android apps built from a single, maintainable codebase.
APIs & integrations
Reliable APIs and back-end services that connect your product to the systems it depends on.
Desktop apps
Cross-platform desktop software for macOS, Windows and Linux, with offline support.
AI agents
Agents that take on repetitive work like triaging support tickets or drafting reports, with logging, human review and hard limits on what they can touch.
Product design
User interviews, wireframes and interface design, so you find out what works before paying to build it.
Case studies
Recent work
A look at how we've helped teams turn hard problems into products.
Contact
Let's build something together
Tell us about your project and we'll set up a short call to explore whether we're a good fit.
- Replies within two business days
- Or email us at stevenc@castroai.com