Lightning Labs is hiring a Senior Security Engineer to support the security posture of its growing, globally distributed engineering organization. This is a hands-on role focused on defining and implementing systems security practices across production and open-source environments that interact with Bitcoin and the Lightning Network.

The role involves securing public-facing services, conducting penetration testing, performing automated and manual code reviews, and overseeing security processes across the software lifecycle. While part of the engineering organization, this position works across functional teams to ensure security considerations are integrated into infrastructure, releases, and operational workflows. Experience with Bitcoin, cryptography, and distributed teams is strongly aligned with the scope of this role.

🔹 Responsibilities

Design and operate fuzzing, black-box and white-box testing, and penetration testing infrastructure for open-source and production systems.
Conduct security audits and reviews of internal systems and external software that interact with Bitcoin and Lightning in security-critical contexts.
Provide mentorship and guidance to engineers on security practices and threat awareness.
Define and maintain organization-wide security policies, standards, and procedures.
Oversee security aspects of software release processes and supporting infrastructure.
Identify and plan security team needs to support future organizational growth.
Develop, maintain, and execute security incident detection and response processes.
Perform risk assessments to evaluate and mitigate security threats.

🔹 Requirements

Minimum of 5 years of experience in systems security roles.
Experience operating in fast-paced, high-impact startup environments.
Deep understanding of operating system internals and computer architecture.
Strong background in cryptography, protocol design, and adversarial analysis.
Experience reverse engineering and exploiting cryptographic or cryptocurrency-related protocols.
Professional software development experience in Go, Rust, C/C++, and/or Java.
Hands-on experience with security incident response, code review, and vulnerability triage.
Prior experience managing or contributing to open-source bug bounty programs.
2+ years of management experience or senior technical decision-making responsibility.
Experience working with remote and distributed teams.
Familiarity with Kubernetes and AWS-based infrastructure.
Working knowledge of Bitcoin and Lightning Network design principles.

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