Freelance Software Developer in Spain

Freelance custom software developer for Spain: custom web apps, portals and internal tools. Planned for GDPR, local payments and your time zone.

Overview

Custom web applications, SaaS MVPs, client portals and internal tools — scoped in milestones, built on maintainable stacks and handed over with documentation. Projects for Spain run remotely, with about 5.5 hours of overlap with a 9-to-6 working day. Scope, milestones and ownership are agreed in writing before work starts.

Spain-specific requirements to plan for

Projects for businesses in Spain have to work for local customers and local rules. These points are planned from the first milestone:

GDPR and the LOPDGDD (Organic Law 3/2018): The LSSI requires a legal notice (aviso legal) and consent for non-essential cookies.
Payment methods customers in Spain expect: Bizum, Redsys card gateway, PayPal and Stripe.
Interface and content languages: Spanish and Catalan, Basque and Galician regionally.

Source: AEPD — Normativa vigente en protección de datos (RGPD & LOPDGDD)

This is practical delivery guidance, not legal advice.

Typical custom software developer projects for businesses in Spain

Spain’s key sectors include tourism & travel, hotels & restaurants, retail & d2c brands and start-ups & saas.

Start-ups & SaaS: an MVP web app with authentication, billing and an admin panel.
Tourism & travel: a booking and itinerary app with payments and WhatsApp confirmations.
Hotels & restaurants: table, room or event booking with automated confirmations.
Retail & D2C brands: inventory, order and loyalty management connected to the store.

Software Developer for businesses across Spain

Projects are planned for the market each business sells into. Cities covered in Spain:

Barcelona: a Mediterranean tourism, design and start-up hub, and host of the annual Mobile World Congress.
Madrid: spain’s capital and largest business centre, with corporate headquarters, finance, retail and tourism.

Working hours: India ↔ Spain

Spain is on UTC+1 / UTC+2 (seasonal). IST is 3 h 30 min – 4 h 30 min ahead. That leaves roughly 5.5 hours of overlap with a 9-to-6 working day. A daily call at 08:00–11:00 your time (12:30–15:30 IST) works year-round. Between calls you get written updates and a staging link that shows the latest build.

Decisions to make before work starts

Map the data model, permissions, integrations, reports and administrative actions. Agree migration, logging, backup and deployment responsibilities alongside the product workflow.

Deliverables to agree in your scope

System architecture document and normalized relational database schema
Secure backend API with role-based access control (RBAC)
Clean, responsive administrator and user web application portals
Automated unit and integration test coverage for business logic
Docker containerization and production deployment CI/CD pipeline
Software that fits your process instead of the reverse
Role-based access, audit logs and backups
Documentation and a clean hand-over to your team

Technology options

Node.js / Express
TypeScript
PostgreSQL / Cloud SQL
React / Next.js
Docker / Cloud Run

Questions for your project brief

What core business workflow will this custom software replace or power?
What distinct user roles will interact with the system?

How the quote is scoped

These factors affect the work involved:

Data entity relationships & permissions complexity
Third-party API synchronization requirements
Reporting & analytics exports

Share your budget in EUR or USD. The schedule, payment milestones, external charges and support terms are agreed in writing before work starts.

Review and handover

Verify important workflows, permission boundaries, validation, failure recovery and agreed load scenarios. Document deployment, handover items and unresolved limitations. Source-code and asset ownership, licences, account access and ongoing support are set out in the project terms.

Can I hire a freelance custom software developer for a project in Spain?

Yes. Share your goals, timeline and budget and you receive clarifying questions or a scoped, milestone-based proposal. Work runs remotely, with written updates and a staging link you can review at any time.

How much does a freelance custom software developer cost in Spain?

It depends on data entity relationships & permissions complexity, third-party API synchronization requirements and reporting & analytics exports. There are no fixed packages: share your budget in EUR or USD and receive an itemised, milestone-based proposal.

How long does a custom software project take?

The service catalog lists a typical range of 30 - 90 days; the real plan depends on scope, integrations and content readiness.

Will the project follow GDPR in Spain?

The build is planned around the GDPR and the LOPDGDD (Organic Law 3/2018): consent capture on forms, a clear privacy notice, data minimisation and suitable hosting. The LSSI requires a legal notice (aviso legal) and consent for non-essential cookies. Final legal wording should be checked by your legal adviser. Official reference: https://www.aepd.es/preguntas-frecuentes/2-tus-obligaciones-como-responsable-del-tratamiento/2-aplicacion-de-la-normativa/FAQ-0201-cual-es-la-normativa-vigente-en-proteccion-de-datos

Which payment methods can be integrated for Spain?

Common options include Bizum, Redsys card gateway, PayPal and Stripe. Gateways are chosen around your customers, settlement currency (EUR) and fees, and the full checkout is tested on mobile.

Which time zone will the project run in for Spain?

Calls run 08:00–11:00 your time (12:30–15:30 IST); everything else is asynchronous, with written updates.

Other services in Spain

Custom Software Development by city in Spain

Raji

Founder & freelance developer

Rajeev, known as Raji, is the founder of ER Freelancer. Work directly with him on websites, applications and business software, with remote collaboration available worldwide.

Based in India · available remotely

Available for remote projects worldwide

Languages: English, Hindi