Joaquín Borja León
Software engineer in Madrid. I build backend and data systems and take them all the way to production.
Digital Governance Trainee at Airbus Defence and Space, studying two master’s degrees at the University of Seville and Camilo José Cela University.
- Now
- Airbus Defence and SpaceDigital Governance Trainee
- Education
- Software EngineeringUniversity of Seville, two master’s in progress
- Focus
- Backend, data and applied AIPython, TypeScript, FastAPI, PostgreSQL
- Languages
- Spanish and English C1German B1
Projects
Orderflow Terminal
A market terminal with options flow, gamma exposure and SEC fundamentals, on real, free data.
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DocuChat
A RAG assistant that answers from your PDFs and cites the source of every answer.
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VecinUs
An app for residents’ communities. I was the project manager and set up continuous integration and repository security.
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Sports Value Detector
Football and tennis models measured against the closing odds, with an honest conclusion.
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RecuerdaMed
A medication app for patients and caregivers, with a public demo.
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Analista incansable
A fundamental screener that scores companies every day and alerts on Telegram.
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Hair salon booking app
Bookings for a hair salon. I built the whole frontend and the business management API.
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Poké-Hub
A data model repository. I built the public profile with each user’s datasets and almost half of the tests.
View projectExperience
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Since Oct 2026
Digital Governance Trainee
Airbus Defence and Space · Getafe, Madrid
Airbus Discover programme in Air Power Services: data governance and support for AI solutions.
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Apr to Jun 2026
Co-founder and Software Lead
Byolux · Sevilla
Bioprocess optimisation startup in the Fusión Startups accelerator. We won its Supersprint with an MVP built in 72 hours.
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Jan to Mar 2026
Software Engineering Intern
Seville City Council (ITAS) · Seville
Widgets and alert management with IoT device data for the Sevilla Smart City platform.
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Jun to Sep 2025
Server, J1 Work & Travel programme
Grand Hyatt Deer Valley · Park City, Utah
Service at a five-star resort, in English and in a multicultural team.
Education
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2026 to 2028
Master’s in Software Engineering: Cloud, Data and IT Management
University of Seville
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2026 to 2027
Lifelong Learning Master’s in Organizational Management in Digital Environments and Data Analytics
Camilo José Cela University, linked to the Airbus Discover programme
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2022 to 2026
BSc in Computer Engineering, Software Engineering
University of Seville, ETSII. Bachelor’s thesis: RecuerdaMed
Languages
- Spanish
- Native
- English, C1
- TOEFL iBT · Cambridge C1 Advanced
- German, B1
- No official certificate
Toolkit
- Python
- Java
- TypeScript
- SQL
- FastAPI
- Fastify
- Spring Boot
- PostgreSQL
- pgvector
- MongoDB
- pandas
- scikit-learn
- RAG
- Ollama
- React
- Next.js
- React Native
- Firebase
- Docker
- GitHub Actions
- Playwright
- n8n
- Ubuntu Server
Let’s talk
I’m from Seville and now live in Madrid. I like things to work end to end: designing the system, writing the code, deploying it and measuring whether it really holds up.
If you’re looking for someone for backend, data or applied AI work, write to me and I’ll get back to you.