Backend Internships

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 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 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.

You will join the backend blockchain team which is in charge of building and maintaining Ledger blockchain infrastructure, core transactional data services, and indexing layers.

The team is composed of passionate Engineers who believe in the benefits and strength of functional programming to develop robust and scalable platforms and APIs, while also being eager to understand and implement product and business requirements. We are convinced that being an engineer is also taking time to challenge, discuss and share what we are working on.

We use Scala extensively to build our backend services and tooling. Have a hand-on experience with it is a great plus, but if you don't know it we will teach it to you. We take time to have every other week a dedicated knowledge-sharing meeting and participate actively in the community (Meetups, Conferences, Open source contributions, etc…).

Duration: 6 months

Start date: January/ March 2025

The mission

• Implement a leader / follower clustering framework in Scala
• Make use of Kubernetes leases to perform cloud-native elections
• Deliver a high-quality piece of software (Test it, Document it, Demonstrate it)
• Conduct benchmarks to identify bottlenecks and optimize the overall performance
• Implement introspectability (web UI) and metric publication.

What we're looking for

• Good knowledge of Linux operating systems
• Adaptability to do teamwork in a fast-evolving environment: You are autonomous, proactive, and capable of self-training.
• Experience with continuous integration/deployment solutions
• Knowledge of Containerization and Cloud deployments
• Having an interest in cryptocurrencies and wishing to work with blockchain technology is a real plus
• Enthusiastic about teamwork, learning, and teaching (meet-ups, hackathons, training…)

What's in it for you?

• Flexibility: A hybrid work policy
• Social: Frequent social events, snacks and drinks
• High tech: Access to high performance office equipment and gadgets, including Apple products
• Transport: Ledger reimburses 75% of your preferred means of transportation
• Food: We offer lunch vouchers with Swile
• Vacation: 1 day off for every full month worked