Celfocus Jobs

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$15k - $27k est.
Lisboa PT

Make an impact by working for sectors where technology is the enabler, where everything is ground-breaking and there’s a constant need to be innovative. Be part of the team that combines business knowledge, technological edge and a design experience - who complement and help each other in developing solutions and experiences for digital clients. Face challenges and learn other ways of thinking and seeing the world. There’s always room for your energy and creativity.


About the role

We are looking for a Blockchain Developer to join our team. You will contribute to a multi-thread team on blockchain projects related with IoT, Telcos and Financial Services, supporting the team with technical skills.

As a Blockchain Developer you will:

  • Develop, extend, and optimized smart contracts on solidity, mainly around NFTs
  • Create server-side scripts using JS to interact with different blockchain APIs
  • Advise Product Owner on technical decisions regarding the adopted framework, strategy, and products & services
  • Maintain and extend client- and server-side applications responsible for integration and business logic using web3 APIs and web3 products & services
  • Conduct comprehensive research of NFT projects and tools, including analysing the NFT economics, mechanics, teams, opportunities, and partnerships to bring this NFT product to the next level

What are we looking for?

  • Bachelor or Master in an IT area
  • Minimum 1 Years in IT
  • Minimum 6 Months developing blockchain 
  • Basics of NFTs-related terminology, standards (ex: ERC-721 and ERC-1155), tools, and trends
  • Basics of NFT-related technology, different marketplaces and blockchain network environments where they exist
  • Knowledge of JavaScript and web3-related libraries: Hardhat, Ether.JS, and/or others
  • Experience developing, testing, and optimizing Smart Contracts
  • Experience with Solidity and related stack. Example: Truffle, Brownie, and/or others – highly appreciated
  • Understanding of DLTs, cryptography, smart contracts, consensus algorithms, cryptocurrencies and blockchain in general
  • Understanding of APIs and Micro-Services


Personal traits:

Ability to adapt to different contexts, teams and Clients

Teamwork skills but also sense of autonomy

Motivation for international projects and ok if travel is included

Willingness to collaborate with other players

Strong communication skills

We want people who like to roll up their sleeves and open their minds. Believe this is you? Come join the Team!