Junior/Mid Full Stack Developer

About the Position

Junior/Mid Full Stack Developer

Founded in Paris in 2014, Ledger is the global leader in digital asset security and Web3 infrastructure. With over 7 million devices sold across 180+ countries, Ledger secures 20% of the world's crypto assets. A team of 600+ professionals works across distributed teams worldwide, with headquarters in Paris. Beyond hardware, Ledger actively supports the broader blockchain and crypto ecosystem through its developer platform and global partnerships.

Responsibilities

• Build and maintain backend integrations with third-party crypto providers (onramp/offramp, swap, staking)
• Develop and monitor API connections, ensuring reliability and performance
• Occasionally contribute to frontend maintenance tasks
• Collaborate with internal tech, product, and data teams across the organization

Requirements

• 2–3 years of backend development experience
• Hands-on experience with Scala, Java, Kotlin, or a comparable backend language - willingness to work in Scala is key
• Solid understanding of Git and CI/CD practices
• Genuine knowledge of the blockchain/crypto ecosystem - professional experience is a plus but not required; passion and active engagement in the space are equally valued

Nice to Have

• Familiarity with TypeScript
• API integration experience

We Offer

• Opportunity to work with a global leader in digital asset security
• Collaborate with a distributed team of 600+ professionals
• Be part of a company that actively supports the blockchain and crypto ecosystem

About the Company

Ledger is the global leader in digital asset security and Web3 infrastructure, with over 7 million devices sold across 180+ countries, securing 20% of the world's crypto assets. The company is headquartered in Paris and works across distributed teams worldwide.