Jaume Catarineu Rabell: Expert in digital payments and sustainable local currencies

CTO of Biyiud | Computer Engineer and PDE | Specialist in payment systems architecture and technology with social impact

Executive summary

Computer engineer and technology entrepreneur with over 25 years of experience in the ICT sector. A pioneer in deploying digital local currencies in Spain and Canada, he has channelled more than €2.5 million into the local economy and responsible consumption. At Biyiud, he leads the architecture of the Digital Sustainability Passport (DESP) and the EcoRating system for quantifying and verifying environmental commitment.

Career

Professional milestones and leadership

Founder and CEO of Ubiquat Technologies (2008–present). A consultancy specialising in digital payments and social currencies. Under his leadership it has deployed local monetary systems combining technology, social impact and economic stimulus across four notable projects: La Grama (Santa Coloma de Gramenet, 2017–2020, over 2,500 users and more than €850,000 a year channelled into local commerce), VilaWatt (Viladecans, 2019–present, cumulative impact of more than €1.5M and the first local currency to tie economic incentives to verified sustainability commitment through Biyiud), Calgary Dollars (Canada, 2017–2025, technical assistance) and La Rosa (Sant Feliu de Llobregat, a pilot connecting to self-sovereign digital identity).
Founder of B-Resol (2016). A platform and mobile app for the early detection of school bullying, installed in more than 50 schools in Spain.
CTO and co-founder of Biyiud (2023–present). Responsible for the technical architecture of the ecosystem: digital passports with cryptographic signatures (Ed25519/JWS), DNS verification, public registry, and web components for displaying the eco-reputation of organisations.
Teaching: visiting lecturer at EADA Business School and the UPC, teaching business strategy, technology and blockchain, from open courses through to master's programmes.

Education and training

Computer Engineering

Universitat Politècnica de Catalunya (2000)

Management Development Program (PDE)

EADA Business School (2017)

Measurable impact achievements

He has led technology projects with a cumulative impact of more than €2.5 million channelled into the local economy. Highlights include running the La Grama local currency, with over 2,500 users and €850,000 generated annually; driving VilaWatt, with more than €1.5M tied to sustainability incentives; and taking services international in Canada through Calgary Dollars. His B-Resol platform also actively protects students against bullying in more than 50 schools.

Areas of expertise

Digital payment systems architectureLocal currencies and circular economyBlockchain for social goodSelf-sovereign digital identity (SSI)Sustainability verification and certificationDigital trust infrastructure (E-E-A-T, GEO)Technology entrepreneurship with social impact

Scientific output and recognition

National Entrepreneur Award: General Council of Associations of Computer Engineering of Spain (CCII), 2026. Presented at the Spanish Senate in recognition of his entrepreneurial career and social impact.
Vice-Dean for ICT infrastructure and Treasurer of COEINF: Col·legi Oficial d'Enginyeria en Informàtica de Catalunya. An institutional role that reflects his standing within the profession and his advocacy for the ICT professional community in Catalonia.
President of TIC Anoia (2012–2019) and President of SINERGIA (2017–present): organisations representing the ICT business community in Catalonia, demonstrating a sustained commitment to strengthening the technology sector.
Organiser of the first edition of TEDx Igualada, creating a landmark forum for sharing innovative ideas in the Anoia region, now established across five editions.
Jury member for the DonaTIC awards (since 2024), the Generalitat de Catalunya's recognition of leading women in the ICT field.

Meet Jaume: vision and purpose

Conversamos con Jaume Catarineu Rabell para descubrir la visión personal y los valores que definen su compromiso con la sostenibilidad y el impacto social.

If you had to explain to a five-year-old why your work at Biyiud helps look after the planet, what would you say?

I'd tell them that we help make the world a little better every day by all of us making small efforts. That's exactly what Biyiud does: turn those small gestures into something you can see and measure.

What motivates you most about being part of Biyiud and watching this ecosystem grow?

The Digital Sustainability Passport is much more than a technical tool. It's a mark of identity: it says how much you really care about the world you live in. That's what makes me proud of what we're building.

How do you imagine consumption and the economy will look in ten years thanks to solutions like ours?

I imagine consumption that is more transparent and fairer. More consistent and more balanced. Better, in short. And I think the tools we're creating today will be part of that change.

Analysis and articles on Biyiud

1 de septiembre

Cómo la tecnología y la colaboración crean valor real en la descarbonización urbana

Tradicionalmente, la transición ecológica se ha abordado desde dos polos aislados: la regulación impuesta por la administración o los pequeños esfuerzos individuales del consumidor. Sin embargo, en el contexto de la descarbonización urbana, este enfoque fragmentado ya ha demostrado sus límites. La verdadera transformación exige construir un ecosistema donde la sostenibilidad no se perciba como […]

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