Senior Javascript Software Engineer - Ledger Live

Ledger

CDI - Permanent
Paris, Île-de-France
Nov 25, 2021

About

Créé en 2014, Ledger est le leader mondial des solutions de sécurité et d’infrastructure pour les crypto monnaies et les applications blockchain - avec plus de 3.5 millions d’utilisateurs dans 165 pays.

Ledger allie des expertises hardware et software afin de sécuriser des milliards de dollars sur près de 2000 actifs crypto - dans le monde, 15% d’entre eux sont aujourd’hui gérés via l’écosystème Ledger.

Forte d’une croissance accélérée (son chiffre d’affaires a été multiplié par 6 entre les premiers semestres 2020 et 2021), d’une nouvelle levée de fonds record qui fait d’elle une licorne valorisée à 1.3 milliards d’euros, la société Ledger sera un acteur majeur de la quatrième révolution industrielle. La révolution de l’internet de la valeur, du web3, de la DeFi et des NFTs.

Ledger conçoit les solutions les plus fiables et les plus simples d’utilisation : notre équipe R&D a créé un Operating System, intégré aux Nanos S et X, et une plateforme, Ledger Live, qui permettent à l’utilisateur de reprendre le contrôle de sa vie digital en lui servant de porte d’entrée sécurisée vers l’ensemble de l’écosystème des actifs digitaux.

Ledger a d’ores et déjà accueilli plus de 150 personnes en 2021… Et ce n’est qu’un début. Basées à Paris, Vierzon, Singapour, New York, Londres, Zurich, Portland, Montpellier et Grenoble, ses équipes signent, en arrivant chez Ledger, un P.A.C.T.E. de valeurs : Pragmatisme, Audace, Confiance, Transparence et Engagement.

Job Description

Ledger is a leader in security and infrastructure solutions for cryptocurrencies and blockchain applications.

We develop hardware wallets, a physical key to keep your crypto assets safe – 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.

What you will do ?

  • 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: , as well as (business logic) and (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
  • Requirements

  • 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
  • Benefits

  • Competitive compensation package, and and ESOP according to the Company policy
  • Flexible working hours, remote friendly environment
  • Strong focus on personal development, including internal and external trainings, and attendance to conferences
  • Internal talks, technical meetups, and hackathons
  • High performance equipment for your work
  • 5 weeks of paid vacation + 10 days of RTT
  • Comprehensive health insurance with medical, dental, and vision coverage
  • Meal Vouchers with Swile (ex Lunchr)
  • Reimbursement for sports and cultural activities
  • Annual company outing for Ledgerdary Days, plus frequent parties, snacks and drinks
  • Employee discount on Ledger products
  • Ledger guarantees equal opportunity for all during the recruitment process, without any distinction of gender, ethnicity, religion, sexual orientation, social status, disability or age

    Additional Information

    • Contract Type:Full-Time
    • Location:Paris, France (75002)