Senior Software Architect, Blockchain & DeFi

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.

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:

As part of a strong growth we are looking for talent to join the Engineering Architecture team. The architecture team is responsible for ensuring the highest level of design quality for both our B2C and B2B products, as well as helping the Product teams scope and build the next great features of our products.

The architecture team aims at building deep, specialized expertise in Ledger's transactional services, and in this context we are looking at reinforcing our team with a future expert to drive the architecture, integration, and improvement of our core services, with a strong focus on new Blockchain protocols and Decentralized Finance (DeFi) applications.

This is a hands-on position and we expect our architects to be able to dig deep into the code and help engineering teams in their day to day issues.

The team you will be joining has the following missions:

• Support Product & Engineering on Discovery & Design of new product features

• Drive Tech Initiatives with Engineering to improve our stack, address tech debt and support good engineering practices

• Support engineering teams on critical topics by providing expertise and hands-on contribution to engineering squads

• Explore new, innovative domains with a focus on concrete Ledger applications, particularly in the Web3/DeFi space

What you’ll be doing:

The responsibilities of an architect are mostly geared toward the engineering teams they support:

• Lead the technical scoping, design, and architecture for integrating new blockchain protocols and tokens into the Ledger ecosystem.

• Drive the research, understanding, and integration of complex Decentralized Finance (DeFi) protocols (e.g., DEXs, lending, staking) with Ledger services, ensuring security and scalability.

• Collaborate closely with engineering leads, product managers and delivery managers to ensure design on most important initiatives are properly done and of good quality.

• Partner with product teams to define, develop and implement development requirements for new product features.

• Help Engineering managers identify, tackle and prioritize most critical technical debt in our transactional services stack.

• Contribute hands on to the development activities of the squads being supported.

• Become a Ledger solution expert to thoroughly understand all use-case scenarios, especially on areas identified in this job description.

An architect is also responsible for some transversal activities, including:

• Be involved in our open source projects and foster our developer community by contributing and maintaining key Open Source software, and helping build our platform strategy.

• Help build visibility on the roadmap by contributing to gross estimates of implementation difficulty.

• Help contribute to Ledger visibility by presenting in conferences or in front of customers our technology know-how.

What we’re looking for:

Requirements

• 10+ years of experience in technical design, development, execution, testing and delivery.

• Deep expertise/interest in backend system architecture, algorithm development, and optimization for high-throughput, high-reliability transactional services.

• Profound, hands-on knowledge of how various blockchain