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POSTED May 29, 2019

Paris   πŸ“† Full-time

at Ledger

Active 21 days ago

As part of its strong growth, Ledger – a technology leader in digital asset and crypto-security solutions – is looking for a back-end developer. You will be responsible for developing and scaling a backend application to allow hundreds thousand people to process their transaction in the crypto-currency world.

Are you able to develop high performance solutions? Do you have experience in continuous integration? Join our team, one of the world’s leaders in one of the most innovative technology sectors!

Job Description


  • Develop a technological stack to explore the contents of a blockchain (Bitcoin, Ethereum, Ripple,Monero …)
  • Build stable platform with new technological stack
  • Optimize the overall performance of the application
  • Conduct benchmarks to identify bottlenecks
  • Creation of the software architecture of the blockchain explorer
  • Develop blockchain abstraction technology to easily integrate new crypto-currencies
  • Set up monitoring for server applications to detect unexpected failures / behavior
  • Set up continuous integration to deploy / test the blockchain explorer

Requirements and qualifications

  • Engineer profile with at least 5 years of experience in Java/ Scala
  • Master NoSQL DB issues Cassandra like DB
  • Throubleshooting & Problem solving oriented
  • Good knowledge of *nix operating systems
  • Open source lover (90% of our code is available on Github)
  • Experience with continuous integration solutions
  • Capable of self-training and monitoring of backend-oriented technologies
  • Having a strong interest in cryptocurrencies and wishing to work with blockchain technology
  • Knowledge of AWS solutions is appreciated

Salary range



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May 29, 2019 βœ… 9 πŸ‘ 305
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