Senior Software Security Engineer (f/m)

TN France; Paris; Hybride; EUR 60 000 - 100 000; Plein temps

Résumé du poste

Join an innovative firm at the forefront of digital security as a Senior Software Security Engineer. This role offers the chance to collaborate with talented teams, tackle vulnerabilities in cutting-edge products, and contribute to the security of a global platform for digital assets. You'll engage in research and development of offensive security techniques, while also promoting secure coding practices. Enjoy a flexible hybrid work policy, comprehensive health coverage, and the opportunity to work with high-performance technology. If you're passionate about security and eager to make an impact, this position is perfect for you.

Prestations

Stock Options

Hybrid Work Policy

Company Outings

Comprehensive Health Insurance

Personal Development Programs

Five Weeks Paid Leave

High-Performance Equipment

Transportation Reimbursement

Employee Discounts

Qualifications

• Experience in security, especially blockchain security.
• Knowledge of financial services and applied cryptography.
• Self-motivated and updated on security developments.

Responsabilités

• Identify and address vulnerabilities in backend services and APIs.
• Conduct security assessments and threat modeling.
• Promote secure coding practices among engineering teams.

Connaissances

Web/Backend Penetration Testing

Python

Rust

Applied Cryptography

Kubernetes

Cloud Infrastructure

Exploitation Techniques

Secure Architecture Design

Formation

Degree in Computer Science or related field

Outils

HSM Security

Description du poste

Social network you want to login/join with:

Senior Software Security Engineer (f/m), Paris

Client: Ledger

Location: Paris, France

Job Category: Other

EU work permit required: Yes

Job Reference: 401b80a9cb96

Job Views: 5

Posted: 11.05.2025

Expiry Date: 25.06.2025

Job Description:

We are the forever innovators, on a mission that goes beyond business: securing digital ownership in a changing world and unlocking true freedom. As revolutionaries, we look beyond today, bridging excellence and pragmatism with ambition and conviction to push the limits of what’s possible. In this innovative environment, you will help write the rules of new technology and create products that redefine security in a digital age.

Founded in 2014, Ledger is a global platform for digital assets and Web3. Over 20% 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 employs over 700 professionals developing a range of products and services to enable secure buying, storing, swapping, and managing of crypto assets, including our Ledger hardware wallets line with over 7 million units sold worldwide.

Donjon, the security team at Ledger, is responsible for the security of all Ledger products. As a security engineer dedicated to consumer services, your daily work will involve attacking our products and ecosystem to maintain and enhance our industry leadership.

Your Mission

• Collaborate with development teams to identify and address vulnerabilities in backend services, APIs, and supporting infrastructure.
• Research cutting-edge offensive security techniques.
• Develop tools and exploits for our products and provide fixes.
• Conduct security assessments and threat modeling for Ledger's services ecosystem, including DeFi and Ledger Live services.
• Promote secure coding practices among engineering teams and present your work at conferences worldwide.

What We're Looking For

• Some experience in security, with blockchain security experience being a plus.
• Good knowledge of applied cryptography.
• Basic understanding of financial services.
• Self-motivated with the ability to stay updated on security developments.

Technical Skills

• Extensive experience in web/backend penetration testing.
• Proficiency in Python and Rust, including secure programming practices.
• Knowledge of Kubernetes and cloud infrastructure.
• Basic knowledge of Scala is a plus.
• Experience with HSM security is a plus.
• Understanding of exploitation techniques and mitigations.
• Ability to develop tools that automate security analysis.
• Skills in designing secure architecture and documenting standards and guidelines.

What’s in It for You?

• Equity: Stock options to share in the company's success.
• Flexibility: Hybrid work policy.
• Social: Company outings, social events, snacks, and drinks.
• Medical: Comprehensive health insurance coverage.
• Well-being: Personal development, coaching, and fitness programs.
• Vacation: Five weeks of paid leave plus holidays and RTT days.
• High tech: Access to high-performance equipment and gadgets.
• Transport: Reimbursement for transportation.
• Discounts: Employee discounts on products.

Ledger is committed to fairness and non-discrimination in its recruitment process.