Custom software, built end to end.
Web platforms, mobile apps, AI automation and CTO as a service.
Every tool tested on our own projects first.
Everything we build, you own.
Based in Barcelona. For projects in Spain, see custom software development in Spain.
Product design
UX and UI from the first sketch to a design system your team can keep using.
Web platforms
Portals, SaaS, marketplaces and internal tools, built around how you work.
Mobile apps
iOS and Android, from first version to the App Store and Google Play.
E-commerce
Shopify stores built around your brand, and moves from WordPress or WooCommerce to Shopify.
AI automation
Agents and automations on the repetitive work: quotes, invoices, reports, follow-ups.
Integrations
Your ERP, CRM and payment tools, connected and sharing data.
Technology consulting
Help with one decision: choosing technology, a technical audit, or a second opinion on a quote.
CTO as a service
Technical leadership when you don’t have a CTO: decisions, architecture and the roadmap, with tools we’ve tested.
What we try on our side. What never changes on yours.
We try first
- New AI models and agent tools, on our own systems first
- Code review agents on our code before yours
- Speed and cost at real volume, not in a demo
Never compromised
- Tests and code review on every change
- You own the code and the data
- Nothing depends on a tool we can’t replace
Newer tools can also cost less to run. We rebuilt one client’s system on more modern technology, and its running and maintenance costs went from €300 to €30 a month.
Tools we’re using, trying and dropping.
One clear first step.
Tell us what you’re building. We’ll tell you what’s worth trying.
- What you’re building, and what you’ve tried
- Which tools would help, from what we’ve tested on our own work
- The next step, or a pointer elsewhere if we’re not the right fit
Video call, Madrid time. No sales sequence.
On our bench: AI-run media and marketing.
We’re testing whether a small team of engineers can run content, campaigns and distribution with AI. On SEIRO first. It becomes a service only when it brings leads that turn into clients, and pays for itself.
Will you use AI on my project?
Only tools that already work on our own business, and only where they make the result better or faster. We tell you which ones and why.
Who owns the code?
You do, fully, on payment. It lives in your repository from day one.
Do you do marketing or content?
Not as a service yet. We’re testing AI-run media and marketing on SEIRO first. Ask us what we’ve learned so far.
Do you offer CTO as a service?
Yes. If your company has no CTO, we take on the technical leadership: which decisions to make, the architecture, the roadmap, and which new tools are worth it. We can also build with you, but you don’t have to. Or hire us for one specific decision, without an ongoing commitment.
Do agents change anything on their own?
Only small, reversible fixes, like rolling back a broken update, and a person reviews each one afterwards from the agent’s report. Anything bigger waits for an engineer’s sign-off.
How do we start?
With a 15-minute call. We agree what to build, and what to leave out, before any code.