Senior Software Engineer, Ledger

Ledger

Location:
France, Paris

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

Senior Software Engineer position at Ledger working on the Ledger Live engineering team to maintain and develop the Ledger Live stack involving mobile and desktop apps and its ecosystem, working 100% on Open Source projects

Job Responsibility:

Participate in modularization effort by contributing to Device Management Kit
Maintain and extend @ledgerhq/hw-transport-* libraries
Contribute to main Ledger 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 5 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

Additional Information:

Job Posted:
September 13, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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Senior Software Engineer