Ledger

Full-stack Engineer

• Work 100% on Open Source projects gathered in the monorepo ledger-live and maintain/develop the Ledger Live stack (mobile and desktop) and its ecosystem
• Participate in modularization effort by contributing to the Device Management Kit for internal and external usage
• Maintain and extend @ledgerhq/hw-transport-* libraries implementing communication protocols with Ledger hardware devices across channels (U2F, HID, WebUSB, Bluetooth) and platforms (Web, Node, Electron, React Native)
• Contribute to Ledger initiatives such as “Clear Sign all the things” and to the “My Ledger” section for firmware updates and app installation
• Collaborate closely with Firmware and Product teams
• Help the QA team to automate testing approaches
• Investigate and hunt bugs, including blockchain edge-case scenarios

Senior Software Engineer

Backend Engineer

About Ledger
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.
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.
The team
You will join the backend services team which is in charge of building services that power Ledger products.
The team is composed of passionate Engineers who believe in the benefits and strength of functional programming to develop robust and scalable platforms and APIs. Customer-focused, they are also eager to understand and implement product and business requirements.
We are convinced that being an engineer is also taking time to challenge, discuss and share what we are working on. A dynamic roll over each service allows every team member to get involved in many projects over time. We take time each month to have a dedicated knowledge-sharing meeting and participate actively in the Scala community (Meetups, Conferences, etc…)
What you’ll be doing
Build highly available, consistent, and performant services to power Ledger’s products
Integrate and consolidate off-chain data coming from several API sources
Leverage all the power of functional programming with Scala and the Typelevel stack
Maintain tools and services in a diverse stack (Scala, Python)
Conduct benchmarks to identify bottlenecks and optimize the overall performance of our services
Deliver a high-quality piece of software (Test it, Document it, Demonstrate it)
Design monitoring systems to detect unexpected failures/behavior
Use CI / CD to deploy and secure workflows

Senior Software Engineer

Scala Software Engineer