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Ledger Logo Ledger · IT - Software Development

Staff Software Engineer - Devices interactions

France, Paris · Job Posted September 15, 2025
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Job Description

Staff Software Engineer role focused on devices interactions, working on Ledger Live stack involving mobile and desktop apps, contributing to Open Source projects in the ledger-live monorepo, developing communication protocols with Ledger hardware wallet devices through various channels and platforms.

Job Responsibility

  • Participate in modularization effort by contributing to Device Management Kit
  • Maintain and extend @ledgerhq/hw-transport-* libraries
  • Contribute to main Ledger's initiatives like 'Clear Sign all the things'
  • Contribute to 'My Ledger' section on Ledger Live application
  • Collaborate closely with other engineering teams like Firmware team
  • Help QA team automate testing approaches
  • Investigate bugs in blockchain edge cases

Requirements

  • Engineer profile with at least 8 years of experience in software development
  • Tech lead experience
  • Proficient with JavaScript and TypeScript
  • Strong background/interest in algorithm development and optimization
  • Excellent knowledge of React and hooks

Nice to have

  • Functional reactive programming (RxJS)
  • Experience with bluetooth or HID communication
  • Open source experience
  • Strong background in Software architecture (SOLID, clean archi, Design Pattern)

What we offer

  • Flexible work options - work from home up to 3 times per week
  • Health & Wellness support - Health and Life Insurance
  • Financial growth opportunities - employees can become shareholders
  • Commuter allowance
  • Learning & Development - comprehensive suite of training solutions
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