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Senior Application Security Engineer

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Onebrief

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Location:
United States

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

170000.00 - 210000.00 USD / Year
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Job Description:

We are hiring an Application Security Engineer to join our Infrastructure & Security team. You’ll report to our Director of Infrastructure and work closely with fellow SREs, Software Engineers, DevOps Engineers, Platform Engineers, Customer Relations, and Cybersecurity Analysts. You will be helping identify, triage and fix security issues within the Onebrief application and related platform and deployed infrastructure.

Job Responsibility:

  • Find Vulnerabilities in our Software: Bring an attacker’s mindset to review PRs, perform code audits, and utilize static analysis to identify vulnerable code patterns
  • Fix Vulnerabilities Across the Full Stack: Think like an adversary to find, fix, prevent or patch vulnerabilities from browser to kernel
  • Improve the Security Posture of Infrastructure: Review identity and access management, logging, auditing, monitoring to help craft a layered defense
  • Make the Team Stronger: Mentor other engineers on best security practices, share news of vulnerable libraries and compromises, engage with community on active threats and trends

Requirements:

  • 5+ years of experience in Application Security, Cybersecurity Engineering, Software Engineering or a related field
  • U.S. citizenship required
  • A strong understanding of Linux, containerization and orchestration, and virtual machines
  • Networking fundamentals: core protocols and secure configurations
  • A deep understanding of incident response processes
  • Clear, concise writing
  • strong documentation habits and async communication
  • Core skills and technologies: Javascript/Browser security, Network Security, Firewalls, Intrusion Detection, Static Analysis, Dynamic Analysis, Container Scanning, Kubernetes, Docker, Helm, Ansible, Terraform, Linux, AWS, DoD compliance, Monitoring and Observability tools
  • 5+ years experience in Cybersecurity, Software Engineering and/or DevOps
  • Familiarity with DevOps practices, CI/CD
  • Familiarity with security tooling such as Static & Dynamic Analysis (SAST/DAST)
  • Familiarity with networking, web protocols
  • Working grasp of PKI, TLS and cryptographic primitives

Nice to have:

  • Experience with compliance frameworks/processes (RMF, STIGs/SRGs, PCI DSS, HIPAA, ICD 503)
  • Security considerations/design for air-gapped environments
  • Active Security+ or another DoD 8570.01-approved security credential, or the ability to obtain the valid credentials within 3 months of employment
  • JavaScript Experience
  • Security+ Certification or other IAT Level II equivalent
  • CSSLP or CISSP
  • Familiarity with DoD Software Lifecycle, RMF/ATO, STIG
  • Pentesting / Red Team experience
  • Familiarity with web authentication/authorization technologies such as SSO, SAML, OIDC, JWT, etc.
  • Experience with Kubernetes and modern Cloud-Native deployment strategies
What we offer:
  • Equity: Share in the company's success
  • Flexible Work Environment: Remote-first organization* with flexible work hours and unlimited PTO
  • Comprehensive Health Coverage: Health, dental, vision, and life insurance
  • Retirement Plan: 401(k) plan with company match
  • Parental Leave: 8 weeks at 100% regardless of state
  • Company Retreats: Annual company summit trips
  • Home Office Budget: $1,000 per year for home office improvements

Additional Information:

Job Posted:
February 21, 2026

Employment Type:
Fulltime
Work Type:
Remote work
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