Vannevar builds AI systems for the Department of War's most consequential missions. We have 125 deployments across every branch and combatant command spanning our core platform and five distinct products. An an example of how we work, when major combat operations started with Iran, we fielded a new product supporting 24/7 operations and 9,000+ users in three months.

How we build is our advantage: we deploy forward with the people who own the mission. Our engineers, product team, and CTO deploy forward to the point of friction, including visiting units in Ukraine. We focus on embedding directly with operational units supporting great power competition with China, combat operations with Iran, and counter-narcotics missions.

About the role

As an Application Security Engineer, you will help build security into our SaaS platform, ensuring we can quickly ship secure features to our customers. You will partner with software, DevOps, and platform teams, while coordinating with audit partners, to embed threat modeling, automated SAST/SCA/DAST, and rapid vulnerability response into every stage of our SDLC. Your work will be pivotal in protecting customer data, meeting compliance milestones, and scaling our security posture as the company grows.

What you'll do

• Implement and deploy enterprise standard SAST, SCA, secrets-scan, DAST, and container/IaC checks in CI/CD
• Embed with development teams to run threat models, review critical PRs, and coach secure-by-default habits.
• Drive a shift-left vulnerability detection program to identify and remediate vulnerabilities earlier in the software development lifecycle (SDLC).
• Coordinate with DevOps for application security issues that cross between application and infrastructure layers
• Support incident-response for product issues and feed lessons back into code, docs, and process.

What you should have

• 5 + years in Application / Product Security
• Hands-on experience securing web applications and automating AppSec workflows.
• Familiarity with DevSecOps practices and container security & patching
• Experience with GitHub Actions, Python, TypeScript/JavaScript
• Clear, concise communicator who can translate risk for engineers

Nice to have

• Experience securing LLM workflows
• Experience with NIST Risk Management Framework
• Experience with software security at a U.S. defense contractor
• Active Security Clearance (or ability to obtain one) and willingness to travel onsite

Benefits: