Ledger is hiring a

Web3 Front-end Device SDK Engineer

At Ledger, we embody the values that make us unique: Pragmatism, Audacity, Commitment, Trust and Transparency. Hear from our employees how they shape the work we do here. 

The team “Device Experience” is looking for a Typescript developer to enforce

the team. You will join a team of 6 developers + the team lead. Device experience scope is composed of 2 main projects.

Ledger Live which is an application that allow our customer to interact with our

hardware wallets. This app exist for mobile (react-native) and desktop (react inside electron). Device SDK which is a new project in Ledger that aim to deliver to every partner in the web3 ecosystem an easy integration with our device.

Missions :

• You join Ledger Live engineering team to maintain and develop on Ledger
• Live stack involving Ledger Live apps (mobile and desktop) and its ecosystem,
• Your work involves working 100% on Open Source projects all gathered in our monorepo: ledger-live.
• You participate to our modularization effort by contributing to our upcoming
• Device SDK, 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 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 4 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,
• Previous experience working with embedded systems,
• Open source experience.
• SOLID principles understanding
• Clean architecture experience
• Github actions (or similar) experience