Senior Blockchain/Cryptography Developer

Well-designed systems since 2001

Job details

  • Full-time
  • map markerLisbon, PT
  • globeRelocation paid
  • cardRequires Work Permit
    Requires that you're a citizen or have a valid work permit / visa sponsorship to work in the country in which this position is based.
  • routeSenior
  • routeEnglish
    Preferred spoken language

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About us

We are blockchain entrepreneurs with over a decade experience in building successful digital businesses. We have developed our own technology allowing us to industrialize the creation of blockchain applications, powered by XES, our own cryptocurrency.

Decentralisation is bringing a period of accelerated change and is reshaping our economies and societies as we know them today. In order to avoid obsolescence, traditional businesses will need to adapt. Proxeus gives them the expertise and technology needed to understand this new reality and transition to a blockchain-based business model.

Whilst we’ve made fast and good progress, we have a long way to go. Whether we’re tokenizing artworks or working with the CEO of a global shipping company, our work is both diverse and challenging.

We have a bold vision – and we’d love your help!

Your Role

You will be hired by Futuretek AG and assigned to the Proxeus project, additionally, you will...

  • Help to make the public blockchain ledger easier to share sensitive data of any kind in a secure way.
  • Help implement and maintain our blockchain infrastructure
  • Educate clients and employees on blockchain development
  • Writing, testing, and deploying Ethereum smart contracts and building the System design around them
  • Supporting the development of DApps as part of our platform

Main requirements

We are looking for a senior technical developer who has worked with Ethereum, Hyperledger or Bitcoin, experienced in solidity programming or any equivalent technology related to blockchain and cryptocurrency development. If you've dreamed of being on the forefront of bleeding edge innovation and creating never before seen products and solutions entering the marketplace, then this is the job for you!

  • At least 5 years professional experience as a software engineer
  • Cryptography, Security, Ethereum, Hyperledger, Bitcoin, Solidity, etc
  • Hands-on experience with implementing Digital Signature Algorithms
  • Apply blockchain security technologies (beyond the world of fintech and cryptocurrency)
  • Evaluate, analyze and target weaknesses in cryptographic security systems and algorithms
  • Experience with smart-contract preferred such as Solidity
  • Willingness to work on multiple crypto assets
  • Design robust security systems to prevent vulnerabilities
  • Able to work as part of an agile team and to develop productive solutions for clients
  • Enthusiastic and flexible personality who wants to learn and work in the newest technologies on the market
  • Team player, strong analytical skills, solution-oriented and proactive
  • Fluency in written and spoken English and German


  • Competitive salary and token participation plan
  • Additional budget for equipment and workstation set up
  • Fast-paced, international environment with a dedicated, execution-oriented team
  • Transparent and honest feedback culture
  • Coaching and mentoring to help you reach your personal goals
  • Flexible work environment and possibility to work remotely
  • Opportunity to have an impact and disrupt the world as we know it!

Apply now

Sign up to apply

Or sign up to refer and earn a reward of €300