Scala Backend Software Engineer, Senior / Lead (f/m)
Ledger
Software Engineering
Paris, France
Posted on Feb 11, 2025
We’re the forever innovators. On a mission that goes beyond business. Securing digital ownership in a changing world. Unlocking true freedom. We’re revolutionaries.
Looking beyond today. Bridging excellence and pragmatism, with ambition and conviction, to push the limits of what’s possible. That’s what you’ll do here, in this playground of innovation. With leadership and trust, you’ll write the rules of new technology, and create products that redefine security in a digital age.
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 500 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.
Ledger Live is a Desktop and Mobile application that helps you manage all your blockchain-backed assets. It’s built in ReactJS (Electron on Desktop and React Native on Mobile) and supports multiple blockchains (coins & NFTs) as well as providing multiple financial services (Buy, Swap, Sell).
To sustain the company's growth, Ledger is looking for new talents. You will start by joining Ledger’s Consumer Services business unit to improve the existing transactional services, and keep delivering new ones. The team focuses on creating easy, secure and clever ways for consumers to buy, exchange, sell, send, receive, grow and secure their crypto.
Your mission
- Develop and maintain high-performance, resilient microservices and APIs to power Ledger's products, including integrations with staking, yield, DeFi services, and blockchain explorers.
- Contribute to the architecture, design, and implementation of scalable solutions, proactively identifying and addressing technical challenges.
- Ensure software quality through testing, documentation, and performance optimization, including monitoring and alerting systems.
- Enhance and maintain CI/CD pipelines to secure and streamline deployment workflows.
- Provide technical leadership and mentorship, collaborating across teams to deliver impactful projects and improve engineering standards.
- Drive innovation by identifying opportunities for improvement, contributing to a shared knowledge base, and participating in technical outreach.
- Manage projects effectively, respecting deadlines, priorities, and deliverables.
What we're looking for
- Experienced engineer and continuous learner with 6+ years of relevant engineering experience.
- 2+ years of technical leadership experience, including effective communication of complex concepts and cross-team coordination to ship critical products.
- Advanced Scala proficiency; expert-level proficiency, and advanced mastery of a second backend language (e.g., Rust, Java, Python, PHP) is a plus.
- Excellent collaboration and communication skills.
- Experience collaborating closely with QA, product management, and key stakeholders to develop and deliver on a shared vision.
- Led development of complex, high-performance interactive browser applications, including architecture, infrastructure, and optimization.
- Experience with various web architecture patterns (e.g., Microservices, Event-Driven, P2P).
- Ability to apply and adapt software engineering best practices to the engineering environment.
- Experience in the Web3 ecosystem and in a project involving blockchain fundamentals.
- Solid understanding of Docker and container orchestration tools like Kubernetes.
- Significant experience with web protocols such as HTTP, JSON-RPC, GraphQL, SOAP, and gRPC.
- Strong comprehension of database fundamentals, both relational and NoSQL.
- Experience working in a multicultural environment, with fluency in English being essential.
- Experience in production support of a client-facing application.
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
- 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.
