We build your operational software in weeks.
Custom software so your operation runs itself. Monitoring, control, and alerts, ready in weeks.
The Problem
No Engineers
Your customers expect dashboards and real-time data. You don't have engineers to build them.
Demo Day is Coming
Demo day is coming. VCs want a platform, not spreadsheets.
Manual Everything
Clients ask for reports. You copy-paste from sensor readings.
Breaks at Scale
What works for 2 clients breaks at 10.
You built a company around something real. Now you're stuck managing tools.
The Solution
Your Tech Team
You focus on your product. We build the platform.
Built to Demo & Scale
VCs see a real product. Not a prototype.
Clients Serve Themselves
Your clients get dashboards and alerts. They stop calling you.
Grows With You
Grows with your operation. No rebuilding.
Spreadsheet chaos replaced with systems that run 24/7.
Problems we solve
"My data lives in spreadsheets"
Sensors, alerts, and dashboards in real time. All in one place.
"I need a product, not a prototype"
From working MVP to full platform. In weeks, not months.
Accessibility Audits
WCAG compliance, assistive tech testing, and European Accessibility Act readiness.
Learn more"My hardware doesn't talk to anything"
We connect your sensors and equipment to dashboards and controls your team can use.
"I'm always reacting too late"
Models that detect issues before they happen. Early warnings, not post-mortems.
"I want to automate repetitive decisions"
Automatic classification, smart alerts, and responses without manual intervention.
How it works
Tell us
You explain what's broken today. We tell you if we can fix it and how. Proposal in 24 hours.
Watch it grow
From week one you have a link to your platform running. You review, give feedback, we iterate.
It's yours
The code is yours from day one.
Tell us
You explain what's broken today. We tell you if we can fix it and how. Proposal in 24 hours.
Watch it grow
From week one you have a link to your platform running. You review, give feedback, we iterate.
It's yours
The code is yours from day one.
PROOF
Companies we've worked with
Why companies choose Callback
| Callback | Freelancers | Agencies | DIY / No-code | |
|---|---|---|---|---|
| Communication |
Direct to engineers
|
Ghosting, timezone gaps
|
Through a PM layer
|
You're alone
|
| Quality |
Production-grade, tested
|
Variable
|
High, but slow
|
Breaks at scale
|
| Accessibility |
Built-in, not bolted on
|
Afterthought
|
Extra cost
|
Not possible
|
| Ownership |
You own everything
|
Depends on contract
|
Often locked in
|
Platform-dependent
|
| Operations focus |
IoT, sensors, monitoring
|
Generic
|
Generic
|
Generic
|
Diego Cattarinich
Full-stack engineer. Based in Valencia. Builds monitoring systems, IoT integrations, and web applications.
Bruno Prieto
Accessibility engineer. Ex-37signals. Makes software usable for everyone.
+ our network of specialized consultants, designers, and AI Engineers.
You get:
Your operation deserves its own platform.
45-minute call. No commitment.