The 10 Best Ethereum Firms in Barcelona - 2025 Reviews
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Top Ethereum Firms in Barcelona

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Discover top-tier Ethereum firms and consultants in Barcelona, ready to revolutionize your blockchain endeavors. Our curated list features vetted experts in Ethereum development, smart contracts, and decentralized applications. Explore each consultant's portfolio and client reviews to make an informed choice. Whether you need Ethereum implementation, dApp creation, or blockchain strategy, you'll find specialists to elevate your crypto projects. Barcelona's vibrant tech scene offers innovative solutions for businesses looking to harness the power of Ethereum. Sortlist allows you to post your project requirements, enabling Ethereum consultants to reach out with tailored proposals that match your specific needs. Unlock the potential of blockchain technology with Barcelona's finest Ethereum professionals.

Top Featured Ethereum Firms

  • Metlabs

    certified-flagverified-flagfeatured-flag
    4.5
    (1 review)

    Somos tu Empresa de Desarrollo Blockchain y dApps

    Nos especializamos en el desarrollo de soluciones basadas en tecnología blockchain. Desde soluciones de trazabilidad y certificación, tokenización RWA Inmobiliaria y más. Con sede en A Coruña, contamos con +4 años de experiencia en el sector y +15 personas en el equipo.
    Looking for work in Ethereum
    Located in A Telva, Spain
    From €10,000 for Ethereum
    Worked in Software & Computer Services (+3)
    Speaks English, Spanish
    11-50 members

All Ethereum Consultants in Barcelona

  • Robler

    certified-flagverified-flag
    5
    (73 reviews)

    "Construyendo marcas para un mundo digital"

    Top awarded
    Uno de los objetivos principales de una agencia de marketing y publicidad es ofrecer servicios de asesoramiento, pero sobre todo funcionar como un apoyo a empresas, emprendedores e incluso organizaciones que necesiten una gestión correcta de su marca. Por este motivo, en Robler Agency, profesionales en Marketing y publicidad, nos enfocamos en cumplir con cada uno de los objetivos de este tipo de agencias con un enfoque totalmente diferente, brindando a su vez nuestra alta experiencia realizando eventos corporativos y multinacionales. Nuestro equipo de trabajo está integrado por profesionales de diferentes países que harán que tus deseos se ajusten a las diferentes culturas existentes en el mundo. Es esta diversidad lo que nos caracteriza como empresa porque nos adaptamos a cualquier requerimiento de nuestros clientes. Pensamos, creamos, diseñamos y hacemos realidad cada una de tus ideas para maximizar el posicionamiento de tu empresa, emprendimiento u organización. El asesoramiento consiste en un estudio que se le hace a cada proyecto en particular, no generalizamos nuestros métodos porque nos adaptamos al estilo de cada empresa. Profesionales en el mundo digital que te ayudan a conectar con verdaderos clientes potenciales en el entorno online. No solo ofrecemos asesoramiento, sino que nos convertimos en parte de tu equipo. Un buen equipo obtiene resultados increíbles.
    Looking for work in Ethereum
    Located in Barcelona, Spain (+45)
    From €400 for Ethereum
    Worked in Education (+45)
    Speaks English, Catalan(+2)
    11-50 members

  • Devyond

    certified-flagverified-flag
    4.9
    (4 reviews)

    Desarrollo web e Inteligencia Artificial para llevar tu negocio un paso más allá

    Recommended
    Tu siguiente paso para crecer no puede esperar. Gana agilidad sumando un partner al día en las últimas tecnologías y especializado en Inteligencia Artificial, para que desarrolle a tu lado, cuando lo necesites, de una manera más sostenible, apostando por la calidad y compartiendo objetivos, siempre con la visión de negocio en el centro. Estamos a la vanguardia.
    Looking for work in Ethereum
    Located in Barcelona, Spain (+2)
    From €1,000 for Ethereum
    Worked in Media (+2)
    Speaks English, Catalan(+2)
    11-50 members

  • Metlabs

    certified-flagverified-flag
    4.5
    (1 review)

    Somos tu Empresa de Desarrollo Blockchain y dApps

    Nos especializamos en el desarrollo de soluciones basadas en tecnología blockchain. Desde soluciones de trazabilidad y certificación, tokenización RWA Inmobiliaria y más. Con sede en A Coruña, contamos con +4 años de experiencia en el sector y +15 personas en el equipo.
    Looking for work in Ethereum
    Located in A Telva, Spain
    From €10,000 for Ethereum
    Worked in Banking & Financials (+3)
    Speaks English, Spanish
    11-50 members

  • Databay Solutions

    certified-flagverified-flag
    5
    (8 reviews)

    🇪🇦 Convertimos datos en Conocimiento enTurning data into knowledge 🇩🇪 Daten in Wissen verwandeln

    📊 Somos Databay Solutions , tu partner tecnológico de confianza especializado en ayudar a las organizaciones a aprovechar al máximo sus datos ofreciendo soluciones personalizadas y servicios de análisis , inteligencia artificial y visualización de datos . 🎯 Nuestro objetivo es impulsar la toma de decisiones informadas y el crecimiento empresarial a través de la utilización estratégica de la información. 👉 Transformamos consistentemente datos brutos en conocimiento perspicaz, construyendo desde aplicaciones o herramientas de datos hasta sistemas de Big Data, BI e IA. Nuestra sede se encuentra en España, sirviendo a empresas europeas con una perspectiva global . Hacemos realidad las visiones de nuestros clientes. Nuestro equipo multidisciplinario ofrece una amplia gama de capacidades internas : ✅Gestión de datos ✅ Servicios AWS y GCP ✅ Servicios de ciberseguridad ✅ Ingeniería de red ✅ Desarrollo de software y aplicaciones. Todo con un firme enfoque en la experiencia del usuario y el diseño corporativo. 📲 Construimos prototipos de alta calidad como la base de nuestros proyectos, demostrándose como una excelente herramienta para demostrar el valor del producto antes del escalado comercial y el inicio del desarrollo. ✔️ Empleamos las últimas tecnologías, aprovechando al máximo nuestra experiencia en Big Data e IA. Nuestro equipo es competente en la creación de soluciones que funcionan sin problemas en varias plataformas y para todos los stack de datos disponibles, centrándose principalmente en AWS, GCP, aunque hemos desarrollado soluciones relacionadas con Azure también. 📈 Nuestras herramientas ayudan a día de hoy a múltiples empresas a crear ventajas competitivas aprovechando el potencial de la toma de decisiones basadas en datos. Confía en Databay Solutions, tu socio para navegar el complejo panorama de datos y llevar tu negocio a nuevas alturas. 🎯 ¿ Estás preparado para impactar en tu negocio y convertir en realidad tu visión de futuro? Contáctanos y nuestro equipo estudiará la mejor manera con la que podemos ayudar a tu negocio . 🖥️ https://databay.solutions/ ✉️ info@databay.solutions 📞 +34 606 21 91 11 _____________________________________________ 📊 At Databay Solutions , we focus on helping organisations make the most of their data by providing customised solutions and services in analytics , artificial intelligence and data visualisation . 🎯 Our goal is to drive informed decision-making and business growth through the strategic use of information . 👉 We consistently transform raw data into insightful knowledge, building from data applications or tools to Big Data, BI and AI systems. We are based in Spain, serving companies across Europe with a global perspective . We make our clients' visions a reality. Our multidisciplinary team offers a wide range of in-house capabilities : ✅ From data management ✅ AWS and GCP services ✅ Cybersecurity services ✅ Network engineering to software and application development. All with a firm focus on user experience and corporate design. 📲 We build high-quality prototypes as the foundation of our projects, proving an excellent tool for demonstrating product value prior to commercial scale-up and early development. ✔️ We employ the latest technologies, making the most of our expertise in Big Data and AI. Our team is proficient in creating solutions that work seamlessly across multiple platforms and for all available data stacks, focusing primarily on AWS, and GCP, although we have developed solutions related to Azure as well. 📈 Today, our tools help many companies to create competitive advantages by harnessing the potential of data-driven decision-making. Trust Databay Solutions, your partner to navigate the complex data landscape and take your business to new heights. 📩 Contact us and our team will study the best way we can help your business . 🖥️ https://databay.solutions/ ✉️ info@databay.solutions 📞 +34 606 21 91 11
    Looking for work in Ethereum
    Located in Benalmádena, Spain (+1)
    From €1,000 for Ethereum
    Worked in Clothing & Accessories (+17)
    Speaks English, German(+1)
    11-50 members

  • Compulsive Coders

    verified-flag
    (0 review)

    Your solution in our hands.

    Development of customized Software: We craft bespoke software solutions that seamlessly align with your business objectives. Talent outsourcing & development cells: We create customized development teams, fully adapted to your needs and objectives. Talent hunting, recruitment and management: We understand that the success of a software project also depends on the talent and dedication of the professionals who develop it.
    Looking for work in Ethereum
    Located in Barcelona, Spain
    From €5,000 for Ethereum
    Works in multiple industries
    Speaks English, French(+2)
    1-10 members

  • WeFlare

    verified-flag
    5
    (1 review)

    Pioneering Growth for Startups and Scaleups

    WeFlare is an international growth agency. We help you enhance your brand's digital footprint, optimize your marketing ROI, connects you with your ideal audience by crafting strategies that that resonate and as unique as your business is. At WeFlare, we architect the blueprints for your brand's accelerated success. We stands at the intersection of innovation, technology, and strategy, delivering solutions that drive consistent results. Our approach is collaborative and data-driven, ensuring that every marketing move is synchronized with your goals. We’re not just another agency, we’re founders, designers, marketers, and growth hackers united by a passion for innovation! Our success is aligned with yours, which is why we walk the talk, moving as your trusted partner to navigate the complexities of digital marketing.
    Looking for work in Ethereum
    Located in Castellón de la Plana, Spain
    From €1,000 for Ethereum
    Worked in E-commerce (+2)
    Speaks English
    11-50 members

  • Soy Social

    verified-flag
    5
    (1 review)

    ¡Lo que necesitas!

    Nacimos para ayudar a las empresas a mantener el paso con las nuevas tecnologías sin tener enormes gastos y sin sacrificar la calidad. Nuestro objetivo es que nuestros clientes alcancen o sobrepasen los objetivos aunque se trata de aumentar las ventas, la cartera de clientes o los productos y/o servicios que presten. Nuestros diseñadores trabajaran para que su producto, servicio o página web sean atractivas para el cliente. Analizamos su estado actual, implementamos procesos para aumentar la visibilidad y seguiremos los cambios. Implementamos normas para aumentar la seguridad en las redes sociales, páginas web y otros medios de publicidad.
    Looking for work in Ethereum
    Located in Cádiz, Spain (+1)
    From €50 for Ethereum
    Works in multiple industries
    Speaks English, Arabic(+31)
    11-50 members

  • Bit2Me

    certified-flag
    (0 review)
    He buys and sells cryptocurrencies from home. With the security, ease, and speed that only Bit2Me can provide.
    Looking for work in Ethereum
    Located in Barcelona, Spain
    Budget on request
    Works in multiple industries
    Speaks English
    1-10 members

  • Yeeply

    verified-flag
    5
    (2 reviews)

    Yeeply te ayuda a contratar a los mejores profesionales del sector tech a distancia.

    Top awarded
    ¡Encuentra al profesional ideal para tu proyecto! Software, web, aplicaciones, Inteligencia Artificial, RPA, EPM ✔️ ¡Confía en Yeeply!
    Looking for work in Ethereum
    Located in Valencia, Spain (+1)
    From €1,000 for Ethereum
    Worked in Internet (+11)
    Speaks English, French(+2)
    11-50 members

  • Occam Agencia Digital

    verified-flag
    5
    (3 reviews)

    Your partner in the digital environment, from ideation and opportunity searching to implementation.

    Occam is a Spanish digital agency specialized in digital transformation through inbound marketing, audiovisual production and software development. Our goal is to use creativity and technology in order to turn your project into a success. We assist Marketing and Human Resources departments, helping your business grow as we make Digital Storytelling, part of your DNA. Show. Don´t tell. OUR EXPERTISE: GRAPHIC AND AUDIOVISUAL PRODUCTION: End to end creations: from the idea to the script and from there to the final product. Discover our range of formats: Corporate video, animated explainers, video events, webinars, motion graphics… We also offer graphic communication services (corporate identity, graphic and editorial design). SOFTWARE DEVELOPMENT: Mobile applications, web pages, backoffices, serious games … It is not only about programming, but also analyzing the needs of the customer, creating a unique design and user experience (UX). INBOUND MARKETING: SEO / SEM techniques, content creation for blogs and social networks... plus INBOUND methodologies at full power. We are Hubspot's Platinum Partner. At Occam we put all the tools at your disposal to develop your online campaigns.
    Looking for work in Ethereum
    Located in Fuenlabrada, Spain
    From €1,000 for Ethereum
    Worked in Software & Computer Services (+8)
    Speaks Spanish, English
    11-50 members

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Insights from Barcelona: Excellence in Ethereum Services

A Hub for Award-Winning Ethereum Expertise

Barcelona, a city already celebrated for its vibrant culture and stunning architecture, has also carved out a reputation as a leading center for Ethereum services. The local agencies have not only excelled in delivering top-notch services but have also garnered accolades that underscore their expertise in the blockchain space.

Notable Collaborations and Clientele

The proficiency of Ethereum consultants in Barcelona is highlighted by their impressive clientele, featuring startups and established firms alike. These agencies have played pivotal roles in pivotal blockchain projects, ranging from initial coin offerings (ICOs) to full-scale enterprise blockchain integrations, showcasing their deep industry knowledge and technical prowess.

Budgeting Advice for Ethereum Projects

Investing in blockchain technology, particularly in Ethereum-based applications, requires careful financial planning. The cost can vary significantly based on the scope and complexity of the project. Smaller ventures or startups looking to pioneer with Ethereum can find flexible and budget-friendly options in Barcelona, particularly with firms that offer modular services or phased project rollouts. For mid-sized enterprises or larger corporations, Barcelona hosts a spectrum of consultants capable of delivering extensive system integrations and ongoing support, with higher-tier services reflecting the depth of engagement.

Final Thoughts

With Barcelona's Ethereum agencies holding a robust track record evidenced by their successful collaborations and the awards they have received, businesses of all sizes can leverage these high-caliber services. Regardless of the project size or budget, there are Ethereum consultants in Barcelona ready to help navigate the complexities of blockchain technology, ensuring that your enterprise stays ahead in the rapidly evolving digital landscape.

Clementina Mata
Written by Clementina Mata Sortlist Expert in BarcelonaLast updated on the 24-03-2025
Cloud ConsultingCyber SecurityWebsite AdministrationBelgium (FR)Belgium (NL)FranceGermanyItalyNetherlandsSpainSwitzerlandUnited Arab EmiratesUnited KingdomUnited States

Frequently Asked Questions.

Ethereum consultants in Barcelona, like their counterparts worldwide, must employ various strategies to stay current with the fast-paced Ethereum ecosystem. Here's how they manage to keep their knowledge and skills sharp:

  1. Continuous Learning: Consultants regularly engage in online courses, webinars, and workshops focused on Ethereum development and blockchain technology. Platforms like Coursera, Udemy, and the Ethereum Foundation's educational resources are valuable for this purpose.
  2. Active Participation in the Community: Barcelona has a vibrant blockchain community. Consultants often attend local meetups, conferences, and hackathons, such as the ETHBarcelona event, to network and share knowledge with peers.
  3. Following Official Channels: Staying tuned to official Ethereum communication channels, including the Ethereum Foundation blog, GitHub repositories, and social media accounts of key developers and researchers.
  4. Hands-on Experience: Many consultants in Barcelona work on diverse projects, allowing them to gain practical experience with new features and upgrades as they're implemented.
  5. Research and Development: Dedicating time to R&D, experimenting with new protocols, and testing upgrades in controlled environments to understand their implications fully.
  6. Subscribing to Industry Publications: Reading reputable blockchain and crypto news sources, academic journals, and technical papers to stay informed about the latest developments and research.
  7. Collaboration with Academia: Barcelona is home to several universities with blockchain research programs. Consultants often collaborate with academic institutions to stay at the forefront of innovation.
  8. Participation in Governance: Actively participating in Ethereum Improvement Proposals (EIPs) discussions and governance processes to understand upcoming changes intimately.

By employing these methods, Ethereum consultants in Barcelona ensure they remain competitive and can provide cutting-edge advice to their clients in this rapidly evolving field. The city's position as a tech hub in Spain further facilitates access to resources and a community that supports continuous professional growth in the Ethereum space.

Ethereum firms in Barcelona, like their global counterparts, approach smart contract development with a keen focus on security, efficiency, and innovation. The city's thriving blockchain ecosystem has fostered a community of highly skilled developers who adhere to rigorous best practices. Here's an overview of their approach:

1. Comprehensive Planning and Design

Barcelona-based Ethereum firms typically begin with thorough planning and design phases:

  • Clearly define the smart contract's purpose and functionalities
  • Create detailed flowcharts and diagrams to visualize contract logic
  • Conduct stakeholder reviews to ensure alignment with business objectives
2. Security-First Development

Security is paramount in smart contract development. Barcelona firms employ several strategies:

  • Implement formal verification techniques to mathematically prove contract correctness
  • Use well-audited libraries and established design patterns
  • Adhere to Ethereum security best practices, such as those outlined by ConsenSys and the Ethereum Foundation
3. Rigorous Testing

Thorough testing is crucial to identify vulnerabilities and ensure functionality:

  • Conduct unit testing for individual functions
  • Perform integration testing to verify interactions between contracts
  • Use automated testing tools like Truffle and Hardhat
  • Simulate various scenarios using testnets before mainnet deployment
4. Code Audits

Many Ethereum firms in Barcelona collaborate with specialized auditing firms or maintain in-house audit teams:

  • Conduct internal code reviews by senior developers
  • Engage third-party auditors for an unbiased assessment
  • Utilize automated audit tools to complement manual reviews
5. Gas Optimization

Efficiency is key in Ethereum development. Barcelona firms focus on gas optimization to reduce transaction costs:

  • Minimize on-chain storage and computations
  • Use efficient data structures and algorithms
  • Implement gas-saving techniques like function modifiers and short-circuiting
6. Continuous Learning and Improvement

The Ethereum ecosystem evolves rapidly, and Barcelona firms stay updated:

  • Participate in local meetups and conferences, such as the Barcelona Ethereum Developers meetup
  • Contribute to open-source projects and share knowledge within the community
  • Stay informed about the latest EIPs (Ethereum Improvement Proposals) and implement relevant upgrades
7. Regulatory Compliance

Barcelona firms are particularly attentive to regulatory requirements:

  • Stay compliant with Spanish and EU regulations on blockchain and cryptocurrencies
  • Implement KYC/AML procedures when necessary
  • Consult with legal experts specializing in blockchain technology

By following these best practices, Ethereum firms in Barcelona have established themselves as leaders in secure and efficient smart contract development. The city's collaborative tech ecosystem, combined with a strong emphasis on innovation and security, has positioned Barcelona as a hub for blockchain excellence in Europe.

Key AspectBarcelona Ethereum Firms' Approach
SecurityFormal verification, audits, best practices adherence
EfficiencyGas optimization, streamlined code, advanced tools
InnovationActive community participation, open-source contributions
ComplianceAdherence to Spanish and EU regulations

As the Ethereum ecosystem continues to grow, firms in Barcelona are well-positioned to lead in developing secure, efficient, and innovative smart contracts that drive the adoption of blockchain technology across various industries.

The Ethereum ecosystem in Barcelona has undergone significant transformation in recent years, mirroring global trends while also carving out its unique position in the blockchain landscape. Here's an overview of the evolution and key developments impacting Ethereum firms and consultants in the Catalan capital:

1. Growth of the Barcelona Ethereum Community:
  • Barcelona has emerged as a major European blockchain hub, with a thriving Ethereum community.
  • The city hosts numerous Ethereum meetups, hackathons, and conferences, fostering innovation and collaboration.
  • Local initiatives like the Barcelona Blockchain Center have played a crucial role in education and ecosystem development.
2. Adoption of Ethereum 2.0:

The transition to Ethereum 2.0 (now referred to as 'The Merge') has had profound implications for Barcelona-based firms and consultants:

  • Increased demand for expertise in Proof-of-Stake (PoS) consensus mechanism.
  • Growing interest in staking services and validator node operations.
  • Need for updated knowledge on scalability solutions and energy efficiency.
3. Rise of Decentralized Finance (DeFi):

Barcelona has seen a surge in DeFi projects and adoption, impacting the local Ethereum ecosystem:

  • Increased demand for smart contract auditing and security services.
  • Growth in DeFi-focused startups and consultancies.
  • Rising need for expertise in yield farming, liquidity provision, and tokenomics.
4. Non-Fungible Tokens (NFTs) Boom:

The NFT revolution has not bypassed Barcelona:

  • Local artists and creators have embraced NFTs, creating new opportunities for Ethereum consultants.
  • Emergence of NFT marketplaces and galleries specific to the Barcelona art scene.
  • Increased demand for NFT-related services, including minting, marketplace development, and legal consultancy.
5. Regulatory Developments:

The evolving regulatory landscape has significantly impacted Ethereum firms and consultants in Barcelona:

  • Implementation of EU's Markets in Crypto-Assets (MiCA) regulation, requiring adaptation and compliance.
  • Increased focus on AML/KYC procedures for blockchain-based businesses.
  • Growing demand for legal and regulatory compliance consultancy services.
6. Integration with Traditional Industries:

Barcelona has seen increased adoption of Ethereum technology across various sectors:

  • Collaboration between blockchain startups and established companies in finance, real estate, and supply chain management.
  • Growing demand for enterprise Ethereum solutions and private blockchain implementations.
  • Emergence of blockchain-focused accelerators and incubators, such as Chainmakers.
7. Talent Pool and Education:

The local talent landscape has evolved to meet the growing demands of the Ethereum ecosystem:

  • Universities in Barcelona now offer blockchain and Ethereum-specific courses and degrees.
  • Influx of international blockchain talent, attracted by Barcelona's vibrant tech scene and quality of life.
  • Increased demand for Solidity developers, blockchain architects, and DApp designers.

In conclusion, the Ethereum ecosystem in Barcelona has matured significantly, offering a wealth of opportunities for firms and consultants. The city's unique blend of technological innovation, creative spirit, and supportive infrastructure has positioned it as a leading Ethereum hub in Europe. As the ecosystem continues to evolve, staying updated with these developments and adapting to new trends will be crucial for success in this dynamic field.