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Ledger

Ledger

www.ledger.com

14 Jobs

707 Employees

About the Company

Founded in Paris in 2014, LEDGER is a global platform for digital assets and Web3. Ledger is already the world leader in Critical Digital Asset security and utility. With more than 6M devices sold to consumers in 200 countries and 10+ languages, 100+ financial institutions and brands as customers, 20% of the world’s crypto assets are secured, plus services supporting trading, buying, spending, earning, and NFTs. LEDGER’s products include: Ledger Stax, Nano S Plus, Nano X hardware wallets, LEDGER Live companion app, [ LEDGER ] Market, the world’s first secure-minting and first-sale distribution platform, and Ledger Enterprise. With its ease of use, LEDGER allows a user to begin investing in digital assets and ultimately, achieve financial freedom in a safe and stress-free environment.

Headquartered in Paris and Vierzon, with offices in London, New York and Singapore, Ledger has a team of more than 900 professionals developing a variety of products and services to enable individuals and companies to securely buy, store, swap, grow and manage crypto assets – including more than 6 millions devices already sold in 180 countries.

Ledger combines either Nano S Plus or Nano X and the Ledger Live app to offer consumers the easiest way to start their crypto journey while maintaining full control over their digital assets. With its ease of use, Ledger allows users to begin investing in digital assets and ultimately, achieve financial freedom in a safe and stress-free environment, with education provided by its Ledger Academy and Quest.

In addition to consumer products, Ledger has also developed Ledger Enterprise, a digital asset custody and security solution for institutional investors and financial players.

Listed Jobs

Company background Company brand
Company Name
Ledger
Job Title
Senior Software Security Engineer
Job Description
Job Title: Senior Software Security Engineer Role Summary: Lead security engineering for consumer-facing services, performing offensive security testing, vulnerability assessment, threat modeling, and development of security tools to enhance product resilience. Expectations: - Conduct continuous penetration testing and threat analysis of backend, API, and cloud components. - Create and maintain automated vulnerability detection tools and exploitation frameworks. - Establish secure coding practices and guide engineering teams on remediation. - Deliver findings to both internal stakeholders and external security conferences. Key Responsibilities: 1. Identify, exploit, and remediate vulnerabilities in backend services, APIs, and supporting infrastructure. 2. Design and implement automated security analysis tools. 3. Perform threat modeling and security assessments for Ledger services, including DeFi and Ledger Live. 4. Promote secure coding guidelines and conduct security training for engineering teams. 5. Present technical results at academic and industry conferences. Required Skills: - Strong web/backend penetration testing experience (penetration testing methodologies, OWASP Top 10). - Proficient in Python and Rust, with secure coding expertise in these languages. - Deep knowledge of Kubernetes and cloud infrastructure security. - Familiarity with Scala (plus). - Experience with HSM security and exploitation techniques. - Understanding of mitigation strategies against common exploits. - Ability to design secure architectures and develop security standards. Required Education & Certifications: - Bachelor’s degree (or equivalent) in Computer Science, Cybersecurity, or related field. - Professional security certifications such as OSCP, OSCE, CEH, or equivalent preferred.
Paris, France
Hybrid
Senior
30-10-2025
Company background Company brand
Company Name
Ledger
Job Title
Internship | Security Engineer Analyst (ZTNA)
Job Description
**Job Title:** Internship – Security Engineer Analyst (ZTNA) **Role Summary:** A six‑month internship focused on Zero Trust Network Access (ZTNA) and network security architecture. The intern will collaborate with security, infrastructure, and platform teams to design, implement, and document secure access solutions for Ledger’s internal infrastructure. **Expactations:** - Final‑year or recently graduated student in computer security, networking, or related field. - Strong interest in Zero Trust and infrastructure‑level security. - Willingness to learn and apply new security technologies and cloud environments. **Key Responsibilities:** - Map application and admin flows; propose Zero Trust patterns (per‑app access, identity‑aware gateways, strong authentication). - Contribute to PoCs and integrations for ZTNA/SASE solutions (cloud console access, internal admin tools, critical SaaS). - Define and document reference architectures, diagrams, and runbooks for secure remote access and network security. - Develop small scripts/tools (Python, shell) for automation, validation, configuration checks, or data collection. - Collaborate with Security Engineering, Infrastructure/SRE, and IT teams on production‑grade environments. **Required Skills:** - Knowledge of networking fundamentals: TCP/IP, routing, DNS, VPN, HTTP(S), TLS. - Understanding of security concepts: Zero Trust, least privilege, segmentation, identity‑ and context‑based access. - Comfortable with Linux environments; proficiency in at least one scripting language (Python preferred). - Basic Git usage and familiarity with cloud platforms (AWS, GCP, Azure, or similar). - Strong analytical skills, ability to read and critique technical documentation, and propose improvements. - Proactive, curious, and detail‑oriented. **Required Education & Certifications:** - Current enrollment or recent completion of a degree program in computer security, computer science, network engineering, or a related discipline. - No specific certifications required; knowledge of certifications such as CCNA, CompTIA Security+, or relevant cloud vendor credentials is advantageous.
Paris, France
On site
05-11-2025
Company background Company brand
Company Name
Ledger
Job Title
Scala Software Engineer - Internship
Job Description
Job title: Scala Software Engineer – Internship Role Summary: Internship position within a backend blockchain team focused on building and maintaining scalable Scala-based services, blockchain infrastructure, and data indexing layers. Expectations: - 6‑month internship with a strong emphasis on rapid learning, autonomous contribution, and active participation in knowledge sharing. - Willingness to self‑train in Scala if not already proficient. Key Responsibilities: - Extend the in‑house JsonRPC reverse proxy (websocket support, session stickiness, etc.). - Deliver high‑quality software: write tests, documentation, and demonstrate functionality. - Perform benchmarks to identify bottlenecks and optimize overall performance. - Implement introspectability (web UI) and publish metrics for system monitoring. Required Skills: - Solid experience with Linux operating systems. - Proficiency in continuous integration / continuous deployment pipelines. - Knowledge of containerization (Docker, Kubernetes) and cloud deployment best practices. - Ability to work autonomously, take initiative, and self‑train in new technologies. - Strong teamwork, communication, and teaching skills (mentoring, meet‑ups, hackathons). - Interest in cryptocurrencies and blockchain technology is a plus. - Familiarity with Scala preferred but not mandatory. Required Education & Certifications: - Current enrollment or recent graduate in Computer Science, Software Engineering, or related field. - No specific certifications required.
Montpellier, France
Hybrid
12-11-2025
Company background Company brand
Company Name
Ledger
Job Title
Firmware Engineer - Internship
Job Description
Job title: Firmware Engineer – Internship Role Summary: Design and develop a device‑agnostic firmware layer for the Ledger Vault SaaS platform, enabling support for Ledger Stax, Flex, and Nano Gen hardware wallets. Work on multi‑device integration, CI automation, and documentation. Expactations: - Complete a 6‑month internship focused on firmware architecture for cross‑device support. - Deliver design documents, project plans, and coding deliverables meeting quality standards. - Collaborate with software, security, and hardware teams to integrate firmware with the Vault application. Key Responsibilities: - Build and extend firmware components to support multiple Ledger devices. - Analyze current Vault‑Ledger Stax interactions and identify integration points. - Design device‑agnostic interfaces and APIs for the Vault app. - Plan and schedule the multi‑device support project, including milestones and deliverables. - Write unit, integration, and automated CI tests (using Ragger or equivalent). - Maintain clear coding guidelines, documentation, and peer reviews. - Participate in code reviews and contribute to continuous improvement of the firmware stack. Required Skills: - Proficiency in Embedded C and Rust programming languages. - Solid understanding of embedded systems architecture. - Fundamentals of cryptography and secure coding practices. - Experience with continuous integration pipelines (CI) and test automation. - Strong analytical and problem‑solving ability. - Effective written and verbal communication in English. Required Education & Certifications: - Current enrollment in or completion of a degree in Computer Science, Computer Engineering, Electrical Engineering, or a related STEM field. ---
Paris, France
Hybrid
12-11-2025