Top 12 Node.js Development Firms in Spain: Best Picks for 2026

Launching or scaling a Node.js product for Spanish customers exposes teams to high expectations around performance, latency, and data protection. Buyers should compare demonstrated Node.js expertise, cloud and container strategy, microservices and API design, CI/CD and automated testing, observability and SRE practices, GDPR-aligned security, language and collaboration capabilities, and post-launch support and SLAs before engaging a partner.
SoftPro appears first as the featured partner for this roundup and serves buyers across Spain as an international Node.js development partner.

Quick comparison of Node.js firms in Spain

1. SoftPro

Chosen as the featured international partner and placed first for this roundup, SoftPro is the author-selected pick for Spanish buyers who need Node.js backends paired with React frontends and progressive web applications. The firm appeals to startups, small and medium enterprises, and corporate product teams in Spain that require offline-capable PWAs, service-worker driven caching, and performance-focused engineering for public web apps and internal portals.

SoftPro’s website explicitly lists Node.js and progressive web apps and highlights React-based frontends, a focus on performance, and long-term maintainability together with ongoing support and maintenance. The site also documents cloud-native deployments on Microsoft Azure and AWS, .NET and ASP.NET Core experience for hybrid stacks, and AI capabilities that reference LLM integrations and RAG-style architectures.

Key Highlights

• Over 20 years of combined team experience declared on the company site.

• Public case studies include Business Portal, CRM/HRM, SAAS ETL, a Support System, and a social network for product promotion.

• Headquarters and EU delivery team based in Warsaw, Poland at Erazma Ciołka 13 lok. 401.

• Website navigation includes a Spanish language option, indicating Spanish-language support for clients.

Services

• Software Development

• Web Application Development

• Cloud Development

• Artificial Intelligence

Contact Information

Website: soft-pro.pl

Phone: +48 571 282 759

Address: Poland, Warsaw, Mazowieckie Voivodeship, 13 Erasmus Ciołka St. 401

LinkedIn: www.linkedin.com/company/soft-pro-pl

2. Multiplica

Multiplica is a global digital consultancy headquartered in Barcelona that designs and builds digital products by combining strategy, user experience, and technology. On its official site the company lists Product Development, Data Engineering, Enterprise AI, and Process Automation among its technology offerings.

The site does not list Node.js or a JavaScript runtime explicitly, so buyers looking specifically for Node.js capability should request engineering stack details and sample architectures or repositories. Evaluate delivery using the firm’s documented approaches on the site: its High-Performance Digital Squads thinking, product-development processes, and published case studies and platform partnerships.

Key Highlights

• 25 years in business and nine international offices listed on the company site.
• Homepage shows 950 clients and 625 consultants as company-scale figures.
• Official technology and platform partners named on the site include Shopify, Adobe Marketing, Magnolia, Retool, Magento, Salesforce, and VTEX.
• The Work section on the official site publishes named case studies and projects, including Fry Reglet and DECORO.

Services

• Conversion Rate Optimization
• Growth Marketing
• Agentic Experience
• Customer Insights

Contact Information

Website: www.multiplica.com

Barcelona — Phone: (+34) 932.492.070

Barcelona — Email: barcelona@multiplica.com

Barcelona — Address: Passeig de Sant Joan 2 Entl. 1ª 08010 Barcelona

Madrid — Phone: (+34) 932.492.070

Madrid — Email: madrid@multiplica.com

Madrid — Address: Calle del Monte Esquinza, 30. 6a planta Izquierda, 28010, Madrid

Miami — Phone: +1 (475) 259-6794

Miami — Email: usa@multiplica.com

Miami — Address: 2222 ponce de leon Third floor, Coral Gables, FL 33134

3. MarsBased

MarsBased builds and maintains mission-critical web and mobile platforms from an EU-based engineering team headquartered in Barcelona. The company’s Services and Technologies pages explicitly list Node.js and Bun among backend runtimes and describe an AI-augmented delivery methodology across engineering workflows.

Buyers evaluating MarsBased for Node.js projects should inspect the Services “Node.js & Bun” entry and the Technologies list, review the Work page case studies for JavaScript backend rebuilds and backend-for-frontend (BFF) work, and verify security posture through the firm’s stated GDPR compliance and ISO/IEC 27001 timeline.

Key Highlights

• 200+ projects delivered and 12 publicly disclosed client exits.
• ISO/IEC 27001 listed with completion planned for Q4 2026, with GDPR compliance and a documented DPA available on request.
• Public case studies include Moody's (MCP server connecting datasets to Claude), HP CPC 2.0 (complete JavaScript tech-stack rewrite), and Holafly (frontend and BFF development).
• Technology and infrastructure stack lists AWS, Azure, Docker, Kubernetes, Terraform, PostgreSQL, Redis, and Elasticsearch, plus monitoring with Sentry and Datadog.

Services

• Node.js & Bun
• Artificial Intelligence
• Tech Audits
• Enterprise software development

Contact Information

Website: marsbased.com

Address: HQ in Barcelona, Spain

4. Synkross

Synkross is a Madrid-based software development agency that builds web and mobile applications to automate processes, increase sales and free time for business teams. Their website lists services for web applications, mobile applications, MVPs, online stores and web design, and a “Casos de éxito” section that highlights projects across hospitality, aviation, home services and logistics.

Buyers considering Synkross for Node.js projects should review the firm’s published case studies and process pages and request the site’s free discovery consultation to confirm team composition, Node.js architecture decisions, deployment practices and post‑launch maintenance arrangements. The site also describes an agile discovery-to-roadmap workflow and available support and maintenance plans that buyers can validate during the initial call.

Key Highlights

• The site displays a public client roster that includes EDP, IKEA, Fintonic, Junta de Andalucía and Península.
• Published case studies named on the site include a Passenger Service System for Airplane Solutions, the Sense Guest hospitality app with pre-checkin, Kelimbo marketplace rescue, and an ERP for Metaideas / Caytco.
• The FAQ explicitly lists the technical stack: TypeScript, React, Next.js, Node.js and cloud platforms including AWS and Vercel.
• E-commerce capabilities are listed with platform options: Shopify, WooCommerce, PrestaShop or custom online stores.

Services

• Web Applications
• Mobile Applications
• MVPs
• Online Stores

Contact Information

Website: www.synkross.com

Phone: +34 919 93 40 40

Email: info@synkross.com

5. Next Digital

Next Digital is a Madrid-based software and data engineering company that lists software development, data and artificial intelligence as core services. Their development page explicitly names Node.js (NestJS) in the backend stack alongside Java and Python.

They say they increase product-team capacity by supplying specialized frontend, backend, DevOps, cloud, infrastructure, product design and UX profiles and they build applications from design through delivery. Buyers assessing Next Digital for Node.js work can validate technical fit by reviewing their backend architecture, microservices experience and evidence of automated delivery and cloud hosting described on the company site.

Key Highlights

• Infrastructure and streaming tools listed on the site include Terraform, Kubernetes, ArgoCD and Kafka.
• DevOps and delivery capabilities explicitly include CI/CD pipelines and GitHub Actions.
• Cloud deployment options shown are Azure, AWS and Google Cloud.
• Mobile development specializations listed include Ionic and React Native.

Services

• Data & AI
• Cloud
• Software development
• Mobile development

Contact Information

Website: www.nextdigital.es

Phone: 91 993 00 34

Email: info@nextdigital.es

Address: P.º de La Habana, 9, Chamartín, 28036 Madrid

6. Interficie

Interficie is a Barcelona-based digital product and engineering firm that delivers custom software, eCommerce platforms and applied AI solutions. The company’s site highlights case studies such as Naturgy, Cambra de Comerç de Barcelona and Rodi Motor Services that demonstrate work in AI-driven efficiency, data-governance platforms and eCommerce conversion projects.

Interficie’s website does not mention Node.js or server-side JavaScript explicitly, so buyers who need a Node.js partner should request concrete stack details and backend examples. Prospective clients can evaluate Interficie for Node.js work by reviewing the published platform and eCommerce case studies and by asking for evidence of API design, backend scalability, and server-side performance tests.

Key Highlights

• Founded in 2001.
• States “Sin cautividad tecnológica” (no vendor lock-in) and commits to open technologies and architectures so clients retain control of code.
• Declares that architecture, performance, security, testing and documentation are included in the product from the start.
• Says applied AI is delivered always integrated within the product rather than as an isolated solution.

Services

• Applied AI
• eCommerce
• Custom software

Contact Information

Website: www.interficie.com

7. Apiumhub

The official apiumhub.com domain currently redirects to the Plain Concepts corporate website. The landing content emphasizes enterprise software engineering, AI-driven product work, and cloud and infrastructure services but contains no Apiumhub-branded Node.js case studies or a dedicated Node.js technology page.

Buyers who want to evaluate Apiumhub for Node.js development should request explicit Node.js references, examples of backend architecture, and deployment/performance metrics from the vendor. The redirected site highlights software delivery, case studies, and global delivery centers, so ask the provider to map those delivery capabilities to Node.js-specific staff, tests, and production monitoring.

Key Highlights

• The apiumhub.com domain redirects to the Plain Concepts corporate website.
• The Plain Concepts landing page lists 2400+ projects.
• The Plain Concepts site shows a founding year of 2006.
• The Plain Concepts homepage lists 700+ employees and 26+ delivery centers worldwide.

Services

• AI Transformation & Adoption
• Software Engineering & SDLC
• Data and Analytics
• Infrastructure & Cloud

Contact Information

Website: apiumhub.com

8. Digitup Studio

Digitup Studio is a Madrid-based, remote-first technical studio that designs and builds production-ready digital products: SaaS platforms, mobile apps, backoffices, integrations, chatbots and automations. Their published technology list explicitly names Node.js and NestJS for backend development and includes REST APIs and microservices as core approaches.

Buyers evaluating Node.js development partners should review Digitup’s technology and delivery details on the site where Node.js, NestJS, TypeScript, Docker, CI/CD, PostgreSQL and MongoDB are listed, and inspect case studies such as the mobility/taxis platform, an EdTech SaaS product and several mobile apps that show production deployments and user metrics. Request an architecture proposal covering API design, microservice boundaries, real-time requirements and CI/CD/monitoring commitments because the firm states it handles deployments, CI/CD and maintenance for products in production.

Key Highlights

• The site shows the legal entity Digitup Studio S.L. with CIF B88533138 and notes the company has been active since 2019.
• Client reputation is documented with a Sortlist score of 4.95/5 from 27 verified reviews and testimonial metrics that include +200,000 downloads, +300,000 users and +3 million services for specific projects.
• Infrastructure and production responsibilities are listed explicitly and include Docker, CI/CD, VPS/Cloud deployments and monitoring.
• The firm publishes sector experience that includes mobility, education, tourism, foundations and finance.

Services

• SaaS platforms.
• Mobile apps.
• AI chatbots and RAG solutions.
• Automations and integrations.

Contact Information

Website: digitup.studio

Phone: +34 654 214 239

Email: hola@digitup.es

Address: Calle Alcalá 211, oficina 7, 28028 Madrid

9. Akimad

Akimad is a Madrid-based digital agency that builds web and mobile applications for product teams. Their website lists Node.js and Express in the technologies section and highlights Progressive Web Apps and client projects such as Bnext and Optimisize.

Buyers evaluating Node.js capability should review Akimad’s technologies page, which names API Rest, Node.js, Express, PostgreSQL and MongoDB, and the method page, which documents continuous integration, DevOps, unit testing and bi-weekly delivery sprints. The site also states that Akimad offers a first technical study of a project to prospective clients.

Key Highlights

• Claims a 90-day time-to-market for new products.
• States 70% of common code is shared between platforms.
• Presents ten years of experience in tech production.
• Listed as an Agente Digitalizador for Spain’s Kit Digital (Next Generation EU) program.

Services

• UX / UI Design
• QA Testing
• Big Data & Machine Learning

Contact Information

Website: akimad.com

Email: contact@akimad.com

Address: Calle Gran Vía 40, 2º1A, 28013 Madrid

10. Idesoftbcn

Idesoftbcn is a Barcelona-based software engineering firm that develops enterprise web platforms, mobile applications, artificial intelligence agents, and computer vision solutions. Their site lists more than 15 years of experience, over 100 completed projects, and more than 75 client companies, and it highlights the Medita App with more than 150,000 downloads.

The site does not explicitly list Node.js or JavaScript on its technology pages. For a Node.js engagement, buyers should request the company’s backend stack and API architecture, examples of real-time system designs, and proof of containerized or cloud deployments because the site shows Docker and major cloud providers and documents a full project lifecycle from consultancy to production support.

Key Highlights

• PMS Hotelmanager is described as a hotel management system deployed in more than 250 hotels.
• A real-time roadway detector project for Federal Signal VAMA demonstrates on-site computer vision and live detection capabilities.
• The site lists integrations and platform partners that include OpenAI, Docker, Google Cloud, Microsoft Azure, AWS, Stripe, and Booking.
• The firm offers CAN/LIN engineering and embedded/firmware consultancy for automotive and industrial clients.

Services

• Custom Software
• Systems Integration
• CAN/LIN Engineering
• SEO & GEO Optimization

Contact Information

Website: idesoftbcn.com

Phone: 933 878 530, 653 622 122

Email: info@idesoftbcn.com

Address: C/ del Comte Borrell, 87 1º 2ª A, 08015 Barcelona, Spain

11. FastIA

FastIA is a Madrid-based custom software development company whose official site explicitly lists Node.js in its technology stack alongside Next.js, React, React Native, Python, and PostgreSQL/Supabase. The site also publishes named client projects and integration capabilities that demonstrate end-to-end platform work.

Buyers evaluating FastIA for Node.js projects should inspect the published client projects on the site and verify integration needs, because the site lists integrations with Stripe, OpenAI/Anthropic, and AWS. Also confirm delivery and commercial terms on the site: FastIA documents weekly development sprints, fixed-price proposals issued in writing, and a typical production timeline of two to eight weeks.

Key Highlights

• Guarantees 100% client ownership of source code and data.
• Lists a standalone invoicing product priced at €499 on the services menu.
• Offers "CTO as a Service" as a packaged offering.
• Promotes free budget calls with near-immediate replies and same-day responses.

Services

• Custom software development
• Web applications
• Mobile apps
• AI automation & agents

Contact Information

Website: www.fastia.es

Phone: +34 645 675 843

Email: hola@fastia.es

Address: Calle Columela, 9, 28001 Madrid, Spain

12. KOUKIO Solutions

Koukio Solutions is a nearshore software development company based in Valencia, Spain. Its Node.js developer page lists proficiency in Node.js, Express, NestJS and TypeScript and describes work on REST and GraphQL APIs, microservices, and scalable cloud architectures using MongoDB and PostgreSQL.

Buyers evaluating Koukio for Node.js work should review the firm’s technical pages that document event-driven architectures, microservices in Node.js, and automated cloud deployments to AWS, Azure and GCP. The site also lists preferred frameworks and tooling such as NestJS, Express, TypeScript and monorepo/CI tooling that clients can use to verify fit before engaging.

Key Highlights

• Founded in 2012.
• Onboards dedicated teams within 2–4 weeks for most roles.
• Each dedicated team is 100% exclusive to the client project, with no shared assignments.
• Uses automated testing and static analysis tooling in CI/CD, explicitly naming Jest, Vitest, Cypress, Playwright, ESLint and SonarQube.

Services

• Custom software solutions
• Dedicated development teams
• Staff augmentation
• Cloud & high availability

Contact Information

Website: koukio.net

Phone: (+34) 961 22 79 35

Email: info@koukio.com

Email: hr@koukio.com

Email: privacy@koukio.com

Address: Calle Alfahuir 45, 1ª Izda, 46019 Valencia, Spain

Conclusion

SoftPro is the featured, author-selected international partner listed first for Spanish buyers who need Node.js backends paired with React frontends and progressive web applications.

When choosing among the other 11 firms, prioritize technical depth in the Node.js niche and verify explicit use of related frameworks and tools such as NestJS, Express, Bun, TypeScript, React and Next.js for the architecture you need. Match delivery model to your procurement and collaboration needs by comparing nearshore, remote-first, EU-based engineering teams and consultancies for timezone overlap and contracting preferences. Also confirm long-term maintenance and integration capabilities, ask for case studies or references that reflect similar scale and complexity, and validate communication rhythms and SLA expectations before awarding a contract.

Frequently asked questions

How much does hiring a Node.js development firm in Spain typically cost?

Costs vary widely based on project complexity, team seniority, and contract type. Expect quotes to reflect scope, integrations, and required QA rather than a simple hourly rate. Ask shortlisted firms for a detailed estimate and a breakdown of fixed versus variable costs. Compare proposals on deliverables and ongoing support rather than headline numbers alone.

How should I compare firms like SoftPro, Apiumhub, and MarsBased for a Node.js project?

Compare portfolio relevance, industry experience, and demonstrated Node.js technical expertise. Request case studies, client references, and a sample architecture or approach to a similar problem. Evaluate communication rhythm, cultural fit, and the firm’s process for testing and maintenance before deciding.

When is it better to hire a Spain-based Node.js agency instead of freelancers or building in-house?

Choose an agency when you need a cross-functional team, project management, and long-term maintenance capabilities. Agencies are also preferable for larger builds that require QA, DevOps, and predictable delivery. For short, narrowly scoped tasks, a vetted freelancer may be faster and cheaper.

What does a typical engagement process and timeline look like with these Node.js development firms?

Engagements usually start with discovery and requirements gathering, followed by a proposal and contract. Development is often delivered iteratively with regular demos, QA cycles, and a final handover plus support arrangements. Clarify milestones, acceptance criteria, and post-launch support up front to avoid timeline slippage.

What are the main risks when hiring a Node.js firm in Spain and how can I mitigate them?

Common risks include mismatched expectations, unclear scope, and gaps in post-launch support. Mitigate these by defining clear deliverables, milestones, code ownership, and SLAs in the contract. Ask for references, review previous projects’ code quality, and set regular reporting and governance from project start.