Site Ledger Ledger

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 700 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.
Ledger is looking for a Backend Engineer. You will be responsible for developing and scaling a backend application to allow big financial institutions to process their transactions in the cryptocurrency world. 
The Ledger Vault is a SaaS solution addressing the need to safeguard very large and diversified amounts of cryptocurrencies while mitigating both IT and physical assault threats. This enterprise-grade solution’s security is based on « HSM » (Hardware Security Module) and hardware authenticators. It is a turnkey SaaS hardware/software suite enabling handling multiple cryptocurrencies through advanced governance rules such as multi-authorization, rate-limiting, and time-locking.
We are looking for talents to build a solid and scalable platform for BtoB financial market.

Your mission

    • Design and develop our governance and orchestration layer; and a set of complex APIs
    • Communicate with cryptographic modules (HSM), and blockchain interfaces
    • Integrate new cryptocurrencies on Vault
    • Work closely with the Product team to define and understand end-user requirements, and translate them into pragmatic technical solutions
    • Work in cross-team environment: You will be in direct contact with Vault’s Frontend and QA engineers, but also with cross-functional teams such as Core, Firmware, Infrastructure, and Operations
    • Participate in firefighting sessions, and interface with stakeholders like Technical Account Managers

What we’re looking for

    • 5+ years of experience in Backend / Software Engineering role, preferably in a product-based startup environment
    • 3+ years of experience in Python as the primary language (Flask or Django)
    • Capable of self-training on backend languages like Scala / C++ / NodeJS
    • Familiarity with software development best practices – version-control, code-reviews, testing, CI/CD
    • Work in an agile environment (Scrum/XP/Kanban)
    • Work in a multicultural environment – English is a MUST

Bonus points

    • You have a sound knowledge of RESTful API design, standards and best practices
    • You have an interest in other API frameworks (e.g. GraphQL), and dabble in message based systems
    • You are keen to step outside your area of expertise, and contribute to all parts of a product
    • You have an interest in cryptocurrencies, and blockchain technology
    • You are active in the open-source community,  speak at conferences, attend meetups, write blogs, contribute code, etc.

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.

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