Senior Javascript Software Engineer

**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 15% of the world’s crypto assets are secured through our Ledger Nanos. Headquartered in Paris and Vierzon, with offices in the UK, US, Switzerland and Singapore, Ledger has a team of more than 800 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 5 millions units already sold in 180 countries.

At Ledger, we embody the values that make us unique: Pragmatism, Audacity, Commitment, Trust and Transparency. Have a look at our Origins video here.

We develop hardware wallets, a physical key to keep your crypto assets safe - Ledger Live is the central software we deliver to our users to manage it and track their cryptocurrency portfolio.

Ledger Live team, at Ledger, provides a bridge between their hardware key and the blockchain to offer a unified experience.
- Ledger live is Community Driven product with 200k+ monthly users.

All our software products have an aspect of integration with our hardware wallets.
- Our engineers interact on a daily basis with hardware, security, crypto, design teams to build the best new generation products.

**Your mission**:

- You join Ledger Live engineering team to maintain and develop on Ledger Live stack, involving Ledger Live apps (mobile and desktop) and its ecosystem
- You maintain and develop new ideas around it on existing and future tooling projects (example: automated testing of crypto transactions with a bot, command line interface, internal/external tooling)
- Your work involves working 100% on Open Source projects: ledger-live-mobile, ledger-live-desktop as well as ledger-live-common (business logic) and ledgerjs (hardware communication)
- Helping our QA team to automate even more our testing approaches
- Be involved in investigating bugs in the complex world of blockchains edge cases

**What we’re looking for**:

- Engineer profile with at least 8 years of experience in Software development
- You have a strong background/interest in algorithm development and optimization to work on our stack: work with device in binary, work with blockchain technologies,...
- You have a good knowledge of JavaScript and are comfortable working with type systems (TypeScript / Flowtype)
- You have a good knowledge of DOM / CSS and UI libraries like React
- You are curious to learn how blockchain works under the hood and investigate deeply complex systems
- Nice to have: functional programming, experience in GraphQL, open source experience

**What our tech stack looks like ?**:

- Language: ES7+ JavaScript (with FlowType and TypeScript)
- UI done with Electron and React (desktop) and React Native (mobile) - and its ecosystem (e.g. redux, react-navigation)
- Interact with hardware devices with async and observable paradigm using RxJS
- We are full stack: from business logic of blockchain to the hardware wallets

**What’s in it for you?**:

- ** Equity**: Employees are the foundation of our success, and we award stock options so you can share in that success as we grow.
- ** Flexibility**: A hybrid work policy.
- ** Social**: Annual company outing for Ledgerdary Days, plus frequent social events, snacks and drinks
- ** Medical**: Comprehensive health insurance policy offering extensive medical, dental and vision care coverage.
- ** Well-being**: Personal development, coaching & fitness with our dedicated partners.
- ** Vacation**: Five weeks of paid leave per year, in addition to national holidays and rest & relaxation (RTT) days.
- ** High tech**: Access to high performance office equipment and gadgets, including Apple products.
- ** Transport**: Ledger reimburses part of your preferred means of transportation.
- ** Discounts**: Employee discount on all our products.

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