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Fecha: 04-jun-2022

Ubicación: MADRID, ES

Empresa: Telefonica S.A.


Job Description

At Telefónica Chief Metaverse Office, the Product Exploration & Prototyping team is looking for a talented and creative Web3 Full-Stack developer to work with cutting edge decentralization technologies. You will be responsible for exploring, designing and implementing innovative proposals to the decentralization Metaverse layer, translating design ideas, concepts into functional prototypes and suggesting new product requirements. Our ideal candidate will have 3-5 years experience in Web3 based technologies, strong programming and coding skills, a keen eye for detail, and the analytical skills to identify potential issues with a design plan. Working across many different departments, this role requires a candidate with excellent communication skills, a pro-active attitude and a good team ethic to unify a common vision.


Our ideal candidate is

  • Security minded
  • A team player
  • Adaptable/flexible: enjoys doing work that requires frequent shifts in direction
  • Achievement-oriented: enjoys taking on challenges, even if they might fail
  • Innovative: prefers working in unconventional ways or on tasks that require creativity
  • Independent, organized, and accountable


Main Responsibilities

  • Quickly create and iterate on prototypes showcasing new designs and interaction patterns
  • Brainstorm and help evaluate applications for new tools and technologies as they continually evolve
  • Design, build, and maintain efficient, reusable, and reliable code
  • Working on exploring and prototyping the latest Blockchain and Web3 improvement proposals
  • Manage developer relations and developer support for projects based on decentralized solutions


Skills and Qualifications

  • Strong software development background (3-5 years of experience)
  • Experience working with open-source projects
  • Strong knowledge of common algorithms and data structures
  • Strong API and SDK design experience
  • Experience with Node.js, JavaScript, and other modern web development technologies
  • Fluent in Blockchain ecosystem and architecture
  • Familiar with Ethereum development frameworks and tools
  • Experience working with Smart Contract main frameworks and tools: Solidity, Truffle, Remix, …



Preferred Qualifications

  • Experience with Python and related development libraries
  • Familiar with other smart contract programming languages: Vyper, Rust
  • Familiar with smart contract open libraries and tools:  Openzeppelin, Chainlink
  • Familiar with Blockchain L2 solutions such us Polygon, Arbitrum, Loopring, … 
  • Understanding NFT taxonomy, principles and standards: ERC721, ERC1155, …
  • Understanding Crypto Wallet taxonomy and security principles
  • Understanding Decentralized Market Place principles and architecture


If you join Telefónica

You join almost 100 years of history, you join a team of 106 nationalities present in more tan 35 countries. You join a team that works to connect people wherever they are. We are leading the digital revolution with the enthusiasm of the first day in all our businesses, creating the best digital ecosystem for our clients: network, IoT, cloud, security, innovation etc. Here, at Telefónica you count with everything you need to be the best you. We need people like you that wants to take this challenge of creating the Telefónica of tomorrow.

Telefonica is committed to the new working ways. Under our proposition “Disconnect to Reconnect” we have applied the Digital Disconnection.



We strongly believe diverse and inclusive teams become more innovative and they achieve improved results. Telefonica aims to promote and guarantee a place for everyone, just the way we are: gender, age range, sexual orientation and/or identity, culture, creed, disability or any other personal condition.