Backend 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 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 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.

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 payments and transactions business unit (Consumer Services) 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 and grow their crypto.

The mission

• Build highly available, resilient, consistent and performant services to power Ledger’s products
• Integrate Staking, Yield and DeFi services through Partners API
• Interact with blockchain explorers to track Network events of interest (Fees, Transaction status…)
• Deliver robust APIs to allows agnostic consumption (Mobile, Desktop, Web)
• Proactively engaging in the architecture and design processes, ensuring the designed solution meets project requirements, can be achieved iteratively with a maximum level of feasibility.
• Maintain and make evolve the existing stack
• Conduct benchmarks to identify bottlenecks and optimize the overall performance of our services
• Deliver high quality piece of software (Test it, Document it, Demonstrate it)
• Design monitoring systems to detect unexpected failures / behavior and efficient alerting
• Develop and contribute to our CI / CD pipelines to deploy and secure workflows

What we're looking for

• 3+ years of experience in backend robust development
• Adaptability to do teamwork in a fast-evolving environment
• Scala, Haskell or functional programming experience is a nice to have
• Java developers who are willing to dive into Scala technologies are welcome
• Strong knowledge on relational database
• Experience with continuous integration / deployment solutions
• Experience of Containerization and Cloud deployments (AWS, Docker, Kubernetes)
• Knowledge on Event-based systems
• You are autonomous, proactive and capable of self-training
• You are adept of pragmatic and simple solutions
• You have an interest in cryptocurrencies and want to work with blockchain technology
• You are enthusiast about teamwork, learning and teaching (meet-ups, hackathons, trainings …)

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: Frequent social events, snacks and drinks in our Holborn office
• Medical: Comprehensive health insurance policy offering extensive medical, dental and vision care coverage
• Well-being: Personal development, coaching & fitness with our dedicated partners
• Vacation: 28 days of paid leave per year, in addition to national holidays
• 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.