[Hiring] Senior Security Engineer & CISO @Ledn

Role Description

As a full-time Senior Security Engineer & CISO (Spain), you will be a hands-on, high-ownership individual contributor responsible for strengthening Ledn's product, cloud, and software delivery security. You will:

• Find vulnerabilities before attackers do.
• Build controls that prevent entire classes of issues from reaching production.
• Help engineers ship securely.

This is a builder-and-breaker role where you will:

• Assess applications, APIs, AWS environment, Cloudflare edge, and GitHub workflows from an adversary's perspective.
• Partner with owners to remediate findings and validate fixes.
• Turn lessons from individual issues into practical standards, automation, and measurable improvements.

You will work closely with Software Engineering, DevOps & Infrastructure, Risk, and Compliance, contributing to technical controls, evidence, and incident readiness that support Ledn's security and regulatory obligations.

This unique, dual-mandate role also involves serving as the Ledn Spain entity’s Chief Information Security Officer (CISO), where you will:

• Own the local Information Security Framework and ICT Risk Register.
• Report periodically to the Board on information security and ICT risk.
• Act as the primary point of contact for the CNMV and external auditors on cybersecurity and DORA matters.

Qualifications

• 5+ years in security engineering, application or product security, or software/platform engineering with a sustained and demonstrable security focus.
• Hands-on penetration testing experience across web applications, APIs, and cloud infrastructure.
• Production code review skills in JavaScript/TypeScript, Python, Go, or a comparable language.
• Threat modeling and secure design experience.
• Strong AWS security expertise in multi-account environments.
• Cloudflare or comparable edge-security experience.
• GitHub and CI/CD security experience.
• Secure SDLC tooling knowledge.
• Software supply-chain and IaC security experience.
• Practical automation skills in Python, Bash, Go, or JavaScript.
• Vulnerability lifecycle ownership experience.
• Experience in fintech or another regulated environment.
• Fluent in English and Spanish.
• DORA and regulatory governance experience in a European financial-services environment.

Requirements

• Must be willing to undergo applicable background checks, in compliance with local laws and regulations, if selected.

Benefits

• Comprehensive, best-in-class total rewards package that starts on your first day.
• Competitive PTO package.
• Ownership in the business through shared equity.
• Opportunity to work remotely anywhere in the world for 180 days (subject to restrictions).
• A career that provides you with purpose in your job.
• Equal opportunity employment organization with a focus on inclusivity and diversity.

Company Description

Ledn is a global financial services company built for digital assets, helping to improve the everyday lives of Bitcoin holders while building generational wealth for the future. We offer a suite of egalitarian lending, savings, and trading products to digital asset holders in over 120 countries around the world.

The core values that guide us are:

• Act with integrity always.
• Own it.
• Have a passion for progress.
• Lead with empathy.

Our team at Ledn is a passionate group of individuals from diverse backgrounds, united by the conviction that digital assets can democratize access to the global economy.