About
An engineering practice, not an agency costume.
Wallion builds custom software for businesses: applications, automations, MVPs, internal tools, cloud, consulting and staffing. One service, one stack, one person accountable. The company began as a guide for businesses crossing their digital transformation — the sherpa spirit survives in how we work, not in what we call ourselves.
Every build uses the same stack, the same hosting, the same monitoring, the same deploy pipeline. That discipline is why we can promise fixed prices and weeks-not-quarters delivery.
How we work
One stack
Next.js, TypeScript, one hosting setup, one monitoring config. Nothing exotic, everything maintained.
Fixed scope, written down
The Diagnosis produces a scope document. That document is the contract.
Weekly visibility
You see progress every week — working software, not status decks.
Business-hours support
Anything that must never go down runs on managed third-party services.
Who's responsible
You'll always know who's responsible.
Wallion is founder-led: the person who scopes the project is the person accountable for it running. No account managers, no hand-offs, no ghost teams.
Oscar has spent 14 years in React, Node.js, TypeScript and AWS, the last of them owning technical direction across several teams at once. The studio sells custom software at a fixed price, in weeks. Same standard he uses when the product has to run on weak hardware or a large workforce.
What he has already shipped:
- •Frontend on TitanOS, the independent Linux system on the Philips 2026 lineup. 18 million users in Europe. UI on low-end TVs.
- •Multi-agent AI assistant (RAG, LLM, Python and React) at Opella / Sanofi, for 11,000 employees.
- •Paramount+ for set-top boxes at Accedo, performance first.
- •Smart TV apps on Tizen, webOS and Vizio (Magellan TV and UK set-top platforms).
Barcelona. The commission stays here. It is not handed to another team.
Thirty minutes. No pitch, just a diagnosis.
Tell us what's breaking. We'll tell you if custom software fixes it — and exactly what it would cost.
Book a 30-minute call