Senior Backend Software Engineer, Ledger

Ledger

Location:
France, Paris ▼
Montpellier

Category:
IT - Software Development

Contract Type:
Employment contract

Salary:

Not provided

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Job Description:

Ledger Enterprise is looking for a Backend Engineer to join the Wallet team. The Wallet domain is responsible for orchestrating interactions with various blockchain-specific components and external APIs. It is mostly composed of an HTTP API (FastAPI) and a resilient workflow orchestration system (Temporal).

Job Responsibility:

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

Requirements:

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

Nice to have:

You have a sound knowledge of RESTful API design, standards and best practices
You have an interest in other API frameworks (e.g. GraphQL)
You 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

What we offer:

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

Additional Information:

Job Posted:
September 25, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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Senior Backend Software Engineer