Madrid · 25+ years building software
I build three things: AI agents that answer on WhatsApp and in your website chat, mobile apps that make it to the App Store and Google Play, and systems that read market data and trade on their own. Twenty-five years doing it.
Solved in 40 seconds · 23:41 · no human involved
What I do
The first three make part of your business run without you. The last two build something that did not exist before. They all start the same way: half an hour of conversation.
They answer your customers with your own business information, book appointments in your calendar and keep the history of every conversation. When it helps, they hand over your Calendly or Brevo link and those tools carry on handling the reminders.
An assistant that knows your services and your prices and answers in your website chat with the same judgement as the WhatsApp one. If your case calls for it, I can also set it up to take phone calls.
Videos generated from a piece of text and posted to your channels on their own, on the days and at the times you choose. No filming, no editing and no remembering to upload them.
From the idea to a published listing on the App Store and Google Play: design, development in Flutter, a Firebase back end and the store submission itself, which is where most projects get stuck. I have three published and in use.
Backtesting engines to try a strategy against years of history, and bots wired by API to the broker that place the orders with nobody watching the screen. Python, Pandas and NumPy.
Product
From the idea to the code, the design and the store. These three are mine; I walk the same path end to end for anyone who wants to ship theirs.
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5-8 s looping · 600 px wideFlutter Flame · Firebase · Vosk
A game for practising pronunciation out loud. Speech recognition on the phone itself, designed together with speech therapists.
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5-8 s looping · 400 px wide
Flutter · Firebase
Videos for children with every item reviewed one by one and grouped by age, plus a timer that cuts screen time. Parents decide what gets watched and for how long.
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5-8 s looping · 400 px wide
Flutter · Firebase · Bloc
A prayer and learning app to raise your level of consciousness. You pray as part of a community: the screen shows how many people are praying with you at that moment.
Data and algorithms
I build systems that read market data, test hypotheses across years of history and run without anyone watching the screen. These are mine, and I build them to order too: from backtesting a strategy to the bot that places the orders.
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16:9 · a backtest chart
Strategy testing on stocks, ETFs and options against historical data. Pandas, NumPy and custom charting.
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16:9 · the bot dashboard or log
A bot wired by API to the E*Trade broker: it reads signals, places orders and logs every trade on its own.
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16:9 · a pandas or matplotlib chart
Cleaning, cross-referencing and charting data with Python, turning scattered spreadsheets into a dashboard you grasp at a glance.
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Square · 800×800 px
Who is behind this
A computer engineer with more than twenty-five years writing software. I started out with telecoms systems in Latin America and today I work from Madrid, between client projects and building my own products.
That path shapes how I work: I look after the project from start to finish. I talk to whoever is going to use it, decide how it gets built and answer for the result. When a project calls for more hands, I put together the team it needs; the person you deal with is still me.
Next step
Half an hour of conversation, no strings attached. Whether it is an agent to answer for you, an app you want to ship or a system to work with your data: I will tell you whether it can be done, how I would do it and what it costs. And if I am not convinced, I will tell you that too.