Stellar Solutions

Application Security Engineer

St. Louis, MO, US$124,800-$145,600Posted 1 month ago

Job Description

Position: Application Security Engineer (Senior AppSec)

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Location

Remote

Duration

6-12+ Months Contract

### Role Overview

We are seeking experienced Senior Application Security Engineers to join our team and play a critical role in validating AI‑generated vulnerability findings and translating them into actionable technical remediation. This position requires strong expertise in application and product security, combined with a deep understanding of how vulnerabilities map to code and how developers remediate them in production environments. The ideal candidate will have a background as a software engineer who transitioned into AppSec, bringing both security insight and practical development knowledge.

### Key Responsibilities

  • Validate AI‑generated vulnerability findings (e.g., from Anthropic’s Mythos) and assess exploitability, severity, and business impact.
  • Trace vulnerabilities to their technical root cause at the code level.
  • Collaborate with development teams to design and implement secure remediation strategies.
  • Conduct secure code reviews, threat modeling, and vulnerability assessments.
  • Define and enforce secure SDLC practices across product teams.
  • Provide guidance on API security, OWASP Top 10 risks, and secure design principles.
  • Partner with product owners and engineering teams to ensure vulnerabilities are remediated effectively and deployed safely.
  • Document findings, remediation steps, and best practices to strengthen organizational security posture.

### Required Skills

  • Strong background in Application Security / Product Security.
  • Hands‑on experience with OWASP Top 10, SAST, vulnerability assessment, secure SDLC, threat modeling, code review, API security.
  • Ability to validate findings, assess severity, and trace vulnerabilities to root cause.
  • Experience working directly with developers to remediate vulnerabilities

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