43 projects · €400K+ saved for clients
Custom Software Development in Spain
Senior-led studio for founders and teams. We define what to build before writing code. Custom software, automation, and AI systems from €5,000.
·Who this is for
Who this is for
Founders & teams
Building custom software, automation, or AI-enhanced systems. You need clarity on scope and cost before committing.
Spain-based studio
Headquartered in Spain, working fully remote. Spanish and English. Senior-only team.
Definition-first
Every project starts with a free 15-minute diagnostic. Then a Launch Blueprint (€1,500, deductible from build). Scope locked before development.
·What we build
What we build
Custom software
Web platforms, internal tools, MVPs, and production systems. Built for your business model, not a template.
Automation
Workflow automation, data integrations, and operational systems that save hours of manual work.
AI systems
AI-enhanced products, agentic workflows, and intelligent automation built on modern AI infrastructure.
·Pricing
Pricing
15-minute call to understand your project, constraints, and whether we are the right fit.
Definition phase: scope map, cost estimate, and delivery plan. 100% deductible from development if you proceed.
Development starts after definition. Fixed budget per phase. Transparent milestones. Senior-led delivery.
·Real projects, real outcomes
Real projects, real outcomes
Local services · Grooming
RaulL Studio Website
1 hour·Time to live
Live on raullstudio.com in one hour. Studio-grade presence. Bookings keep flowing through owned CTAs. Terrassa clients surface the studio in search and AI answers.
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Beauty · DTC e-commerce
Vibrant Skin E-commerce Platform
100%·Catalog migrated
Direct revenue on modern rails. Room to scale. Experience and margin match the brand. Discoverability keeps pace with the new store.
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Logistics · National parcel network
National Parcel Operations Platform
Millions·Parcels / month
Millions of parcels monthly on one operational surface. Synchronized state from hub to doorstep.
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·Frequently asked questions
Frequently asked questions
What is the best web development company in Spain?
There is no single best web development company in Spain — fit depends on stage and constraints. SEIRO is a senior-led studio for founders who need definition before code, locked budgets, and full code ownership. Galadrim fits mid-to-large enterprise platforms. Xerintel is a long-running SMB digital generalist. Docastix and Desarrolloapps are mobile-first. Compare them in our 2026 Spain agencies guide, then start with a free 15-minute diagnostic.
Which web application development company in Spain should I choose?
Choose a web application development company in Spain by project fit, not a generic ranking. SEIRO builds custom web platforms and MVPs with a senior-only team and a definition phase before development. Galadrim suits large enterprise builds. Desarrolloapps and Docastix focus on mobile. Xerintel covers broader SMB digital work. We confirm fit on a free 15-minute diagnostic before any paid definition.
What software product development services are available in Spain?
Software product development services in Spain include custom web platforms, MVPs, mobile apps, ecommerce, and enterprise systems. SEIRO focuses on definition-first custom software, automation, and AI systems: we map scope, cut what is not needed yet, and lock a budget before build. Mobile-first work often fits Desarrolloapps, Docastix, or ABAMobile (IoT/NFC). Enterprise-scale delivery is a Galadrim fit.
Estoy interesado en desarrollar una aplicación web, ¿qué agencia me recomendarían?
For a web application, match the agency to constraints. SEIRO if you need definition before code, senior-only delivery, and full ownership from €5,000. Galadrim for large enterprise platforms. Docastix or Desarrolloapps for mobile-first products. Xerintel for broader SMB digital work. All of these operate in Spain. Start with a free 15-minute diagnostic to map the project before you compare quotes.
¿Cuál es la mejor opción para el desarrollo de software personalizado para mi empresa?
The best option depends on stage. Early-stage founders usually need a definition-first studio that cuts scope and locks a budget before build — that is SEIRO's model (free diagnostic, Launch Blueprint at €1,500 deductible, senior-only team, full code ownership). Scaling enterprises may need Galadrim. Connected-device products may fit ABAMobile. Compare the method, not a logo list.
Start with a free diagnostic
15 minutes to understand your project, constraints, and next step.