Senior Software 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: The Ledger Live engineering team objective is to maintain and develop on Ledger Live stack involving Ledger Live apps (mobile and desktop) and its ecosystem. The work involves working 100% on Open Source projects all gathered in our monorepo: ledger-live .

What you’ll be doing:

• You participate in our modularization effort by contributing to our Device Management Kit, intended for both internal and external usage. ()

• You maintain and extend our @ledgerhq/hw-transport-* libraries that implement communication protocol with Ledger hardware wallet devices through many communication channels (U2F, HID, WebUSB, Bluetooth,...) and platforms (Web, Node, Electron, React Native,...).

• You contribute on the main Ledger's initiatives like “Clear Sign all the things” ()

• You contribute to “My Ledger” section on Ledger Live application where users can update their devices’ firmware and install applications,

• You collaborate closely with other engineering teams like the Firmware team as well as your Product team

• You help our QA team to automate even more our testing approaches,

• You hunt bugs: Be involved in investigating bugs in the complex world of blockchains edge cases.

What we’re looking for:

• Engineer profile with at least 5 years of experience in software development and a tech lead experience,

• A curious mind with a positive attitude to join a highly collaborative team

• Proficient with JavaScript and TypeScript,

• Strong background/interest in algorithm development and optimization to work on our stack: work with devices using APDU, messages, work with blockchain technologies, etc.,

• 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)

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:

• Flexible work options - Our hybrid policy allows employees to work from home up to 3 times per week

• Health & Wellness support - Health and Life Insurance.

• Financial growth opportunities - Employees can become shareholders in Ledger as well as other financial benefits depending on your country of work.

• Commuter allowance - Ledger offers a commuter allowance to contribute to your preferred means of transportation.

• Learning & Development - A comprehensive suite of training solutions providing a personalised learning experience for every employee.

For regionally specific benefits, your Talent Acquisition contact will be able to provide you with more information.

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.