Senior Backend Software Engineer - Blockchain applications

Ledger; Paris; Hybride; EUR 60 000 - 80 000; Plein temps

Résumé du poste

A leading technology company in Paris is looking for a Backend Software Engineer to develop backend applications that enable financial institutions to process cryptocurrency transactions. The ideal candidate has over 5 years of experience, primarily in Python, and is familiar with RESTful API design. This role offers flexible work options and comprehensive benefits, including health insurance and learning opportunities.

Prestations

Flexible work options

Health & Wellness support

Financial growth opportunities

Commuter allowance

Learning & Development

Qualifications

• 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 (FastAPI).
• Familiarity with software development best practices - version-control, code-reviews, testing, CI/CD.

Responsabilités

• Develop and scale a backend application for financial institutions.
• Design and develop governance and orchestration layer; and APIs.
• Integrate new cryptocurrencies on Vault.

Connaissances

Backend development experience

RESTful API design

Python proficiency

Agile methodologies

Outils

FastAPI

CI/CD

Description du poste

About Ledger

We’re a team of experts pushing the limits of what’s possible, united by our common goal to unlock true freedom through digital ownership, making technology accessible for all. We believe in a world where users, creators and enterprises manage their value with ownership and freedom. Our curiosity drives us to innovate, empowering individuals on a global scale. We believe change is constant and our team moves forward as one, with a culture of problem-solving where every employee is empowered and supported to challenge tradition and create solutions. Our mission is simple: to make self-custody accessible and give people the keys to their own financial futures. If you want to make a true impact, we want you to join us at Ledger.

We’re proud to be the global platform for digital assets and Web3, with over 20% of the world’s crypto assets secured through our Ledger devices. With our headquarters in Paris, and offices in Vierzon, Grenoble, Montpellier, London, Portland, Geneva, Zurich and Central Singapore, we have a team of around 600 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 7.5 millions units already sold in 200 countries.

The team

The team is building Ledger Enterprise Platform, our 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.

What you’ll be doing

• You will be responsible for developing and scaling a backend application to allow big financial institutions to process their transactions in the cryptocurrency world.
• 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
• 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 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 (FastAPI)
• Capable of self-training on backend languages like Scala / 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

At Ledger, we are dedicated to continually investing in our employees which is why we offer more than just salaries; we provide comprehensive compensation packages that include a wide range of benefits. Here are some of the benefits you can look forward to:

Benefits

• Flexible work options - Our hybrid policy allows employees to work from home up to 3 times per week
• Health & Wellness support - Health and Life Insurance.
• Financial growth opportunities - Employees can become shareholders in Ledger as well as other financial benefits depending on your country of work.
• Commuter allowance - Ledger offers a commuter allowance to contribute to your preferred means of transportation.
• Learning & Development - A comprehensive suite of training solutions providing a personalised learning experience for every employee.

For regionally specific benefits, your Talent Acquisition contact will be able to provide you with more information.

We’re committed to building an inclusive hiring process. If you need any adjustments or accommodations, just let us know, we’ll do our best to support you.