Blockchain Developer – English Speaking Start-up

Acerca de la Empresa

Telefónica is a leading global telecommunications company, headquartered in Spain, with a strong commitment to innovation. Telefónica Innovation Alpha is our cutting-edge venture, operating with the agility of a startup but backed by the resources of a global leader. We focus on exploring and developing disruptive technologies, including blockchain, to build the next generation of digital services. Our team in Seville fosters an agile, English-speaking environment, blending startup dynamism with corporate stability to solve complex challenges.

Descripción del Trabajo

We are seeking a talented and enthusiastic Blockchain Developer to join our English-speaking start-up team in Triana, Seville. You will play a crucial role in designing, developing, and deploying innovative blockchain solutions that will shape the future of our digital offerings. This is an exciting opportunity for a proactive individual to contribute to cutting-edge projects within a dynamic and collaborative environment, working on distributed ledger technologies from concept to production.

Responsabilidades Clave

• Design, develop, and deploy secure and scalable blockchain solutions, smart contracts, and decentralized applications (dApps).
• Collaborate with product managers and other engineers to define and implement new features and functionalities on blockchain platforms.
• Write clean, efficient, and well-documented code, ensuring high performance and security of blockchain applications.
• Participate in the full software development lifecycle, including requirements gathering, design, testing, deployment, and maintenance.
• Research and evaluate new blockchain technologies, protocols, and tools to identify potential applications and improvements.
• Integrate blockchain components with existing traditional systems and APIs.
• Conduct code reviews and contribute to architectural discussions to maintain high code quality and system integrity.
• Stay up-to-date with the latest trends and advancements in blockchain technology and the broader cryptocurrency ecosystem.

Habilidades Requeridas

• Proficiency in at least one major blockchain platform (e.g., Ethereum, Solana, Polkadot, Hyperledger).
• Strong experience with smart contract development using languages such as Solidity, Rust, or Vyper.
• Solid understanding of cryptographic principles, distributed systems, and blockchain architecture.
• Experience with Web3.js, Ethers.js, Truffle, Hardhat, or similar development frameworks.
• Proficiency in a general-purpose programming language (e.g., JavaScript/TypeScript, Go, Python, Java).
• Excellent verbal and written communication skills in English.
• Demonstrated problem-solving abilities and a passion for emerging technologies.

Cualificaciones Preferidas

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field.
• Experience with cloud platforms (AWS, Azure, GCP) and containerization technologies (Docker, Kubernetes).
• Familiarity with front-end frameworks (e.g., React, Angular, Vue.js) for dApp user interfaces.
• Knowledge of different consensus mechanisms (PoW, PoS, DPoS) and their implications.
• Experience working in an Agile/Scrum development environment.
• Contribution to open-source blockchain projects or personal blockchain projects.

Ventajas y Beneficios

• Competitive annual salary and performance-based bonuses.
• Comprehensive health and wellness benefits package.
• Generous paid time off and public holidays.
• Flexible working hours and a hybrid work model allowing a mix of office and remote work.
• Opportunities for professional development, training, and certifications in cutting-edge technologies.
• Access to a vibrant, international, and English-speaking team.
• Modern office space located in the historic and lively Triana district of Seville.
• Employee discounts on Telefónica products and services.

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