Senior Application Security Engineer - Remote

Overview

At Unstructured, we’re building the data infrastructure that powers next-generation LLM and RAG applications. Security is core to that mission — our customers trust us with their most sensitive data, and we take that responsibility seriously. We’re looking for a Senior or Staff-level Application Security Engineer to help lead and scale our AppSec program.

In Short

• Lead security architecture and threat modeling efforts for high-impact features and services.
• Perform deep, security-focused code reviews and guide development teams in remediation best practices.
• Build and maintain automated security testing and developer enablement tooling that scales with the org.
• Partner with engineering leadership to embed security into the SDLC.
• Act as a technical mentor to junior AppSec engineers and partner teams.
• Lead incident response and post-mortems for application security issues.
• Drive security documentation, training, and best practices for developers.
• Support cross-functional security initiatives with product, infrastructure, and compliance teams.
• Provide light people management for junior engineers.

Requirements

• 5+ years of AppSec or product security experience.
• Proven track record of leading security reviews and threat modeling.
• Deep knowledge of common vulnerabilities and mitigations.
• Experience with security tools and libraries.
• Proficiency in at least one modern programming language.
• Strong understanding of cloud-native environments and securing CI/CD pipelines.
• Excellent communication and stakeholder management skills.

Benefits

• Shape the security roadmap of a company at the forefront of AI and data infrastructure.
• Collaborate with world-class engineers and leaders on mission-critical initiatives.
• Competitive compensation, equity, and benefits.