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Senior Application Security Engineer

Upstart

Remote · United States$13,908–19,242 gross/mofull-timeUpstart Careers

We’re proudly digital-first, giving most Upstarters the flexibility to do their best work from wherever they thrive, alongside teammates across 80+ cities in the US and Canada. Digital-first doesn’t mean distant.

Responsibilities

  • Lead application security projects from planning through implementation, coordinating contributors and dependencies to deliver high-quality outcomes.
  • Conduct threat modeling and security architecture reviews for complex customer-facing applications, APIs, distributed services, and AI/ML systems.
  • Design and implement secure-by-default controls across the software development lifecycle, including secure coding standards, API protections, automated testing, CI/CD safeguards, and secrets management.
  • Partner with engineering teams to identify systemic vulnerabilities, evaluate practical remediation options, and ensure high-risk issues are resolved effectively.
  • Build services and automation that improve vulnerability detection, prioritization, validation, and prevention while reducing friction for developers.

Languages

    Work format
    Remote
    Seniority
    Senior
    Posted
    4 Sept 2026
    Last verified
    In the last 5 days

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