Principal Product Security Engineer

Principal Product Security Engineer

Position Overview

We're looking for a Principal Product Security Engineer to lead and scale Obsidian's product security program across our SaaS product, cloud infrastructure, CI/CD pipelines, and related services. This is a senior, highly technical role for someone who can combine deep security engineering expertise with strong ownership, judgment, and cross-functional leadership.

You'll partner closely with Engineering, Product, GRC, IT, DevOps, SRE, and Platform teams to embed security throughout the SDLC, strengthen cloud and infrastructure security, mature threat modeling and secure design practices, and drive automation across detection, response, vulnerability management, and security testing.

This role reports to the Head of Security and is ideal for a seasoned product security leader who thrives in a fast-moving, high-growth cybersecurity startup and wants to make a meaningful impact on the security of our product, customers, and organization.

Key Responsibilities

• Lead and evolve Obsidian's product security program, including standards, runbooks, technical documentation, and operational practices.
• Provide technical leadership, mentorship, and secure design guidance to security and engineering teams.
• Drive security architecture reviews, threat modeling, secure coding practices, and scalable security design reviews.
• Integrate security deeply into the SDLC through code review, SAST/DAST, fuzzing, SBOMs, dependency scanning, and CI/CD security controls.
• Partner with infrastructure teams to harden AWS, GCP, Kubernetes, GitLab, Terraform, data pipelines, secrets management, and service-to-service access controls.
• Improve security automation, monitoring, metrics, dashboards, and reporting.
• Lead technical response for product security incidents, vulnerability remediation, penetration testing, and red team findings.
• Support customer and prospect security reviews as a senior technical security expert.

What We're Looking For

• 10+ years of product security and/or engineering experience in cloud-native environments, ideally in cybersecurity, financial services, or another high-security industry.
• Strong software engineering skills, especially in Python.
• Hands-on expertise with Terraform, Kubernetes, AWS, GCP, GitLab, security automation, and security metrics.
• Deep knowledge across application security, cloud security, detection and response, vulnerability management, and secure SDLC practices.
• Experience partnering with engineering, product, IT, GRC, and external stakeholders during security reviews and incidents.
• Strong communication skills with the ability to influence, educate, and raise security maturity across the company.
• A mission-driven, ownership-oriented mindset and the ability to thrive in a dynamic startup environment.

What We Offer

• A team-first, low-ego, mission-focused culture.
• High-impact work shaping the security of Obsidian's product and platform.
• Professional development opportunities and annual conference budget.
• Competitive salary, equity, and health benefits.
• Opportunities to publish research, share non-proprietary code, and present at conferences.
• The chance to join a fast-growing company backed by Greylock Partners, Google Ventures, Menlo Ventures, WingVC, and Norwest Venture Partners.