Ledger is hiring a
Web3 Front-end Device SDK Engineer

Compensation: $85k - $148k *

Location: Paris, France

Front-end Device SDK Engineer

Paris, France
Tech – Software Engineering - Frontend /
Permanent contract / CDI /

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We're making the world of digital assets accessible and secure for everyone. Join the mission. 
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 900 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 6 millions units already sold in 200 countries. 

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
We are an equal opportunity employer for all without any distinction of gender, ethnicity, religion, sexual orientation, social status, disability or age.

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Compensation: $85k - $148k *

Location: Paris, France

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