Application Security Engineer, Unstructured.io
Data prepping for Large Language Models
Be an early applicant
Data prepping for Large Language Models
21-100 employees
Be an early applicant
21-100 employees
Company mission
To give organizations access to all of their data.
Role
Who you are
- 5+ years of AppSec or product security experience, with at least 2 years in a senior or leadership capacity
- Proven track record of leading security reviews, threat modeling, or architecture reviews in production environments
- Deep knowledge of common vulnerabilities and mitigations (OWASP Top 10, SANS CWE, etc.)
- Experience with security tools and libraries (SAST, DAST, dependency scanning, penetration testing)
- Proficiency in at least one modern programming language (Python, Go, or JavaScript preferred) and scripting experience
- Strong understanding of cloud-native environments (AWS, GCP, Kubernetes) and securing CI/CD pipelines
- Excellent communication and stakeholder management skills, able to translate security concerns into actionable guidance
Desirable
- Experience building or scaling security programs in a startup or high-growth environment
- Background in securing AI, ML, or data-intensive applications
- Experience managing bug bounty or responsible disclosure programs
- Prior experience with team management or mentoring
What the job involves
- 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 this role, you’ll own key security initiatives, partner closely with engineering and product teams, and guide junior team members while remaining deeply hands-on with code reviews, automation, and threat modeling
- 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 and promote a secure-by-default culture
- 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 across the company
- Support cross-functional security initiatives with product, infrastructure, and compliance teams
- Provide light people management (mentorship, feedback, and possibly managing 1–2 junior engineers as the team grows)
Our take
Unstructured.io is tackling a prevalent challenge in AI adoption - the difficulty of integrating complex, enterprise-sized data with Large Language Models (LLMs). The company's platform provides a solution by extracting and staging all data, even that which is in difficult-to-use formats, and making it compatible with LLMs.
Thus, the startup streamlines the time-consuming data preparation process, providing tools for otherwise complex tasks like removing unwanted elements, text concatenation, and Optical Character Recognition (OCR). It also tailors processing pipelines for specific document types, addressing a critical bottleneck in AI development workflows.
In enabling the seamless integration of LLMs with enterprise data, Unstructured's platform has the potential to unlock substantial productivity gains. As of March 2024, its open-source library has been download more than 6M times and by 2025, the total user base has grown significantly, with over 65,000 organizations now leveraging Unstructured tools. The company continues to develop its solution to the data-preparation bottleneck, a crucial component in meeting the evolving demands of enterprise-scale LLM deployments.
Steph
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 3 rounds)
Mar 2024
$40m
SERIES B
Jul 2023
$20m
SERIES A
Total funding: $65m
Company HQ
SoMa, San Francisco, CA
Leadership
Brian S. Raymond
(Founder & CEO)Previously worked in Investment Banking at Harris Williams & Co. Prior to this they worked at The White House in the National Security Council and as an Intelligence Officer at the Central Intelligence Agency.
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