Staff Security Engineer

Fullscript•Austin, TX

About The Position

Fullscript is seeking a seasoned Staff Security Engineer to join our security team as a senior technical leader. In this role, you’ll shape the technical vision for product and AI security across the organization, mentoring teammates and driving impact through deep technical expertise and cross-functional collaboration.

Requirements

Deep technical expertise in application security, and secure software development.
Experience with AI/ML security.
Strong understanding of modern software architectures, cloud environments, and APIs.
Proven ability to influence and mentor engineers across teams, fostering security-first thinking and best practices.
Hands-on experience with security tooling and automation, including static/dynamic analysis, monitoring, and observability systems.
Strong problem solving skills, able to balance security rigor with product velocity.
Excellent communication and collaboration skills, able to translate complex security concepts to technical and non-technical stakeholders.

Nice To Haves

Experience with protecting / hardening of health data.
Experience securing Ruby on Rails, Javascript, GraphQL applications.
Familiarity with regulatory and compliance frameworks relevant to software and AI security is a plus (e.g. SOC 2, NIST).

Responsibilities

Lead the design and implementation of robust security architectures for Fullscript’s applications, and AI initiatives.
Collaborate closely with engineering teams to embed security into the development lifecycle, including threat modeling, security coding practices, and design reviews.
Drive AI security best practices, ensuring responsible deployment, and mitigation of risks such as data poisoning, prompt injection, or model exploitation.
Mentor engineers and other security team members, fostering a culture of security awareness and technical excellence across the organization.
Conduct technical risk assessments, security research, and code reviews to proactively identify and remediate vulnerabilities.
Influence cross-functional teams through technical leadership, helping define security standards and strategies that scale across Fullscript’s products and AI ecosystem.
Stay ahead of emerging threats, attack vectors, and AI-specific security challenges to guide strategic decisions for the organization’s security posture.