Xavi Colomer Tell me what you have in mindContact me

INDEPENDENT MAKER · BARCELONA

You bring the challenge. I make it happen. Fast.

I'm Xavi, an independent maker in Barcelona with 20+ years of building things that ship: AI development, software, hardware and design in one pair of hands. I take a fuzzy idea and turn it into something you can click, use or hold: software in two to four weeks, a little longer when there is hardware to print and wire. An AI feature built on your data, an app, a connected device, a demo that wins the room. Fixed scope and fixed price, agreed up front.

The full track record is on LinkedIn.

Tell me what you have in mind See the work
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DESK BOTBENCH-01 · ONLINE · 24.6°
LIVE VIEW
EYES
DESK ROBOTanswers only from what's on this page
hola. Ask me about the work, the nine steps, or the print that cracked.
Answers come from a short script for now. Email me for anything it can't answer.

01 / 09 · THE IDEA · [EXAMPLE BUILD]

Imagine you have an idea.

It starts as a sketch: what it's for, what it must sense, what it must not cost. That's the level I start from with you. A napkin or a voice note is enough.

Product thinking · requirements · sketching

02 / 09 · TECHNICAL DRAWING

It becomes a plan.

Parts, dimensions, balloon numbers, a bill of materials. The drawing is what you get at the end, and what keeps the build from drifting in the middle.

Mechanical design · technical drawings · bills of materials

    03 / 09 · 3D MODELLING

    The plan takes shape.

    Modelled once and used everywhere: this render, the simulation that follows, the file that goes to the printer. Nothing is redrawn by hand, so nothing drifts.

    CAD · 3D modelling in Blender · print preparation

    04 / 09 · SIMULATION

    You test it before it exists.

    Joint ranges, wheel speed, battery, the sensor's sample rate, all run on screen first. A mistake found here costs an afternoon; on the third print it costs a week.

    Simulation in the browser · control logic · test plans

    05 / 09 · PRINT AND ELECTRONICS

    Suddenly it's real.

    Printed in PLA, laid out on the bed, wired and assembled on the bench. The second print cracked at the lid; the third one fit, and that goes in the write-up too.

    3D printing · electronics: ESP32, sensors, power · firmware

    06 / 09 · CONTROL

    It reacts to you.

    Throw something at it and it dodges. Here that's a handful of rules with a reaction time; the simulator from step 4 is where a small model would be trained to do it better.

    Control loops · small models trained in simulation

    07 / 09 · MOBILE APP

    It fits in your pocket.

    A phone app with a live view and controls that talk to the board. The app is the part people actually touch, so it gets the same care as the hardware.

    Mobile apps · real-time links to hardware · interface design

    08 / 09 · WEB AND CLOUD

    It gets a home on the web.

    A dashboard for the whole fleet: devices, logs, firmware updates, in a browser. Same data, same design system, one codebase for the board, the app and the site.

    Web apps · cloud backends · deployment · design systems

    09 / 09 · AI

    And now it's alive.

    A chat with the robot's face on it, answering only from what's on this page: the steps, the work, the print that cracked. Its eyes are the same model, still looking at you.

    LLM integration · answers from your own documents · guardrails

    This robot was the example. Yours is about your challenge.

    Software in two to four weeks; physical builds a little longer. Fixed scope and fixed price, agreed in writing before anything starts. Every step above is a real deliverable [example build shown].

    Got something you've been meaning to start? Tell me about it.

    Read and answered by me · Barcelona, CET · calls around your time zone

    or write to me [at] xavicolomer [dot] com