Jobs and Careers
LE
Senior Software Security Engineer (f/m)
LedgerFranceRemotefull_timeVerifiedPosted 2 Sept 2025
About the role
<p><strong>About Ledger</strong></p><p>We’re a team of experts pushing the limits of what’s possible, united by our common goal to unlock true freedom through digital ownership, making technology accessible for all. We believe in a world where users, creators and enterprises manage their value with ownership and freedom. Our curiosity drives us to innovate, empowering individuals on a global scale. We believe change is constant and our team moves forward as one, with a culture of problem-solving where every employee is empowered and supported to challenge tradition and create solutions. Our mission is simple: to make self-custody accessible and give people the keys to their own financial futures. If you want to make a true impact, we want you to join us at Ledger.</p><p>At Ledger, we’re proud to be the global platform for digital assets and Web3, with over 20% of the world’s crypto assets secured through our Ledger devices. With our headquarters in Paris, and offices in Vierzon, Grenoble, Montpellier, London, Portland, Geneva, Zurich and Central Singapore, we have a team of around 600 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 7.5 millions units already sold in 200 countries.</p><p><strong>The team</strong></p><p>Donjon is the team in charge of the security of all the products built at Ledger. </p><p><strong>What you’ll be doing:</strong></p><p>As a security engineer dedicated to <strong>consumer services</strong>, 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.</p><p><strong>What we're looking for: </strong></p><ul><li><p>Fluency in Python, Rust, including secure programming in these languages.</p></li><li><p>Kubernetes and cloud infrastructure knowledge are required.</p></li><li><p>Basic knowledge of Scala programming is a plus.</p></li><li><p>Experience in HSM security is a plus.</p></li><li><p>Good knowledge of exploitation techniques, and of mitigations against such techniques.</p></li><li><p>Development of tools that automate security analysis.</p></li><li><p>Design of secure architecture</p></li><li><p>Ability to develop and document methods, standards, and guidelines.</p></li></ul><p></p><p>At Ledger, we are dedicated to continually investing in our employees which is why we offer more than just salaries; we provide comprehensive compensation packages that include a wide range of benefits. Here are some of the benefits you can look forward to:<strong> </strong>(delete as appropriate)</p><ul><li><p><strong>Flexible work options - </strong>Our hybrid policy allows employees to work from home up to 3 times per week</p></li><li><p><strong>Health & Wellness support - </strong>Health and Life Insurance.</p></li><li><p><strong>Financial growth opportunities - </strong>Employees can become shareholders in Ledger as well as other financial benefits depending on your country of work.</p></li><li><p><strong>Commuter allowance - </strong>Ledger offers a commuter allowance to contribute to your preferred means of transportation.</p></li><li><p><strong>Learning & Development </strong>- A comprehensive suite of training solutions providing a personalised learning experience for every employee.</p></li></ul><p>For regionally specific benefits, your Talent Acquisition contact will be able to provide you with more information.</p><p><em>We’re committed to building an inclusive hiring process. If you need any adjustments or accommodations, just let us know, we’ll do our best to support you.</em></p>
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