Juan Sebastian PeñaAI & Data Engineer · Madrid
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I build client products end-to-end — one is in production today, taking real orders.
About
Building clear AI and data-driven systems with strong product judgment.
I'm Juan Sebastian Peña — I build and ship AI and data products end-to-end, from zero to production: Craig, a live AI ordering agent, and Boletapp, an anti-fraud ticketing platform. Technical excellence only matters when people can understand and trust it. Alongside that, I'm finishing a degree in Computer Science and AI in Madrid.
Outside of work, salsa and bachata shape how I think about adaptability, collaboration, and connection.
Now
Madrid
Focus
Software · AI · Product
Values
Human-centered · Systems-minded
Experience
Where I've been building
Client work running in production, my own venture, and selected competitions.
- AI Software Engineer· Strategos AIFeb 2026 — present · Madrid · Remote
- Sole engineer on Craig: an AI ordering agent live for a Dublin print shop that quotes, charges and manages orders end-to-end.
- LLMs and multi-agent systems in real business workflows. Direct report to the CEO; the founders are non-technical.
- Technical founder· Boletapp2026 — ongoing · Colombia
- Anti-fraud ticketing platform, pre-launch: rotating HMAC QR and an offline-first door scanner.
- One crypto engine in TypeScript and Python, kept bit-for-bit identical by shared tests.
- GenAI Mavericks — hackathon (1 week)· Accenture2025 · Madrid
- First edition: 100+ students from 20 universities.
- RAG solution turning legal documents into plain language (Justice 2030 Spain).
Contact
Let's talk.
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