Staff Security Engineer: SSDLC & Threat Modeling Lead

LinkedIn; Mountain View (CA); Hybrid; USD 156,000 - 255,000; Full time

Job summary

LinkedIn in Mountain View is seeking a Staff Security Engineer to join the Production & Enterprise Security team and strengthen the security posture of LinkedIn's core products, cloud infrastructure, and development workflows on a hybrid model. The role focuses on leading threat modeling, designing secure-by-default frameworks, and building scalable tooling to detect and mitigate vulnerabilities at scale.

You will drive SSDLC, architecture reviews, and risk assessments across complex systems,

Qualifications

• BA/BS Degree in Computer Science, Cybersecurity, Information Security, or related technical field, or equivalent technical experience.
• Hands‑on experience or working knowledge of web/application security, cloud security risks, or secure development lifecycle practices.
• 5+ years experience in security engineering and in-depth knowledge of application security, authentication and security protocols, cryptography, or supply chain security.
• 5+ Experience in various security assessment methodologies such as threat modeling, design reviews, penetration testing and vulnerability assessment.
• Experience with programming languages such as Java, GoLang or Python.
• Experience architecting or implementing tooling that detects and mitigates security vulnerabilities.

Responsibilities

• Own and drive the secure software development lifecycle (SSDLC) and shift-left security controls across engineering platforms, including automated SAST/DAST scanning, software supply chain security, and CI/CD security guardrails.
• Architect and build secure-by-default frameworks, paved roads, and developer guardrails for cloud infrastructure, microservices, authentication/authorization services, and core application components.
• Build automation and security tooling that continuously identifies, reproduces, and mitigates application and cloud security vulnerabilities at scale; partner with Detection & Response on security logging, telemetry, and incident playbooks.
• Lead threat modeling, architectural design reviews, and risk assessments for complex engineering systems and platforms. Partner with security and engineering teams to embed secure design patterns and risk mitigations into developer tooling and production services.
• Define application and cloud security standards, reference architectures, and policies across product development, API design, data storage, and third‑party integrations; drive secure adoption of cloud services and enterprise tools.
• Drive cross-functional architecture and engineering decisions across platform engineering, security engineering, ML/AI teams, and product/DevEx to build developer platforms, AI systems, and infrastructure that are scalable, reliable, and secure by design.

Skills

Security engineering

Threat modeling

Programming: Java/Go/Python

SSDLC / security tooling

Security architecture

Education

BA/BS in CS or security

Tools

SAST/DAST tooling

Cloud security tooling

SSDLC automation tools

Job description

LinkedIn in Mountain View is seeking a Staff Security Engineer to join the Production & Enterprise Security team and strengthen the security posture of LinkedIn's core products, cloud infrastructure, and development workflows on a hybrid model. The role focuses on leading threat modeling, designing secure-by-default frameworks, and building scalable tooling to detect and mitigate vulnerabilities at scale.

You will drive SSDLC, architecture reviews, and risk assessments across complex systems,