Senior Software Engineer (Platform)

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 the UK, US, Switzerland, and Singapore, Ledger has a team of more than 900 professionals. We develop 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 million units 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 & The Role

Ledger Wallet is our flagship application, built on a Open Source monorepo using React, Electron (Desktop), and React Native (Mobile). It supports multiple blockchains and integrates numerous DApps.

You will join the Platform Team, a transverse unit responsible for the "skeleton" and infrastructure of Ledger Wallet. We don't just build features, we build the foundation that allows other feature teams to ship faster and safer.

We are looking for a Senior Engineer to help own the tech stack, improve our monorepo architecture, and drive the transition toward micro-frontends. You will treat "other developers" as your primary customers, focusing on tooling, build speed, and Developer Experience (DX).

Your Missions

• Architecture & Monorepo Management: Set and uphold the engineering standards for our large-scale monorepo, Ledger Wallet. Drive improvements in dependency management, build performance, and structural organization so the codebase scales cleanly with dozens of contributors.

• Micro-Frontends & Scalability: Work on shaping the technical strategy for decoupling our architecture by architecting automated CI/CD workflows and micro-frontend approaches that enable independent team deployments on both Mobile and Desktop Platforms.

• Developer Experience (DX): Design and build internal tooling, scripts, and CLIs that remove friction for other developers. If a process is slow or manual, your job is to automate it.

• Tech Stack Governance: Maintain the health of our core stack (React, React Native, Electron, TypeScript). Handle upgrades, minimize technical debt, and enforce best practices across the organization.

• Mentorship & Advocacy: Act as a technical referent. Promote engineering standards, conduct high-level code reviews.

What We're Looking For

• Experience: 8+ years in software development with significant experience in complex Frontend architectures.

• Stack Mastery: Deep proficiency in TypeScript and React. You understand how React works under the hood (reconciliation, rendering, performance).

• Platform Mindset: Proven experience managing Monorepos (using tools like Nx, Turborepo, Lerna, or similar) and configuring build tools (Webpack, Rspack, ESBuild, Metro, Re.Pack).

• Mobile & Desktop: Experience with React Native and/or Electron is highly critical for this role, as you will impact both platforms.

• Architecture: Practical experience implementing Micro-frontends or modular architectures at scale.

• CI/CD Ops: Familiarity with configuring pipelines (GitHub Actions, CircleCI) and optimizing build/test parallelization.

• Soft Skills: You are empathetic to the struggles of other developers and have a "service-oriented" mindset toward internal teams.

Nice to Have

• Experience with native modules in React Native.

• Experience in Web3 topics and technical stacks.

• Active contributor to Open Source projects.

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.