We’re the forever innovators. On a mission that goes beyond business. Securing digital ownership in a changing world. Unlocking true freedom. We’re revolutionaries.

Looking beyond today. Bridging excellence and pragmatism, with ambition and conviction, to push the limits of what’s possible. That’s what you’ll do here, in this playground of innovation. With leadership and trust, you’ll write the rules of new technology, and create products that redefine security in a digital age.

Founded in 2014, Ledger is the global platform for digital assets and Web3. Over 20% of the world’s crypto assets are secured through our Ledger Nanos. Headquartered in Paris and Vierzon, with offices in UK, US, Switzerland and Singapore, Ledger has a team of more than 700 professionals developing a variety of products and services to enable individuals and companies to securely buy, store, swap, grow and manage crypto assets – including the Ledger hardware wallets line with more than 7 millions units already sold in 200 countries. 

Donjon is the team in charge of the security of all the products built at Ledger. As a staff security engineer, your daily job will be to attack our products and the whole ecosystem they interact with, in order to maintain and improve our leadership in the industry.

Your misson

• Research cutting-edge offensive security techniques,Develop tools and exploits for our products, and provide fixes for them,
• Perform security assessments of Web3 interactions, including smart contract, clear signing mechanisms, and dApp integrations.
• Collaborate with the Product team to define secure user flows, reducing risks from malicious Web3 interactions.
• Present your work in academic and hacking conferences all over the world.
• Strong experience in Web3 security.
• Good knowledge of DeFi protocols and dApps development.
• Basic in financial services.
• Self-motivated with a strong ability to work and maintain security knowledge in a changing landscape.
• Fluency in Solidity and Rust including secure programming in these languages.
• Knowledge in reverse engineering and binary analysis.
• Good knowledge of exploitation techniques, and of mitigations against such techniques.
• Strong experience with static analysis tools and formal verification.
• Ability to develop and document methods, standards, and guidelines.
• Equity: Employees are the foundation of our success, and we award stock options so you can share in that success as we grow. 
• Flexibility: A hybrid work policy.
• Social: Annual company outing for Ledgerdary Days, plus frequent social events, snacks and drinks.
• Medical: Comprehensive health insurance policy offering extensive medical, dental and vision care coverage. 
• Well-being: Personal development, coaching & fitness with our dedicated partners.
• Vacation: Five weeks of paid leave per year, in addition to national holidays and rest & relaxation (RTT) days.
• High tech: Access to high performance office equipment and gadgets, including Apple products. 
• Transport: Ledger reimburses part of your preferred means of transportation .
• Discounts: Employee discount on all our products.

Ledger guarantees fairness for all during the recruitment process, regardless of gender, ethnic origin, religion, sexual orientation, social status, disability or age