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Senior App Security Engineer – $70/hr

Mercor
Full Timesenior
CAPosted March 16, 2026

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Job Description

**About The Job**

  • *Mercor**

connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include

  • *Benchmark**

,

  • *General Catalyst**

,

  • *Peter Thiel**

,

  • *Adam D'Angelo**

,

  • *Larry Summers**

, and

  • *Jack Dorsey**

.

  • *Position:**

Software Engineer - Cybersecurity

  • *Type:**
  • *Freelance**
  • *Compensation:**
  • *$60–$70/hour**
  • *Location:**
  • *Remote**
  • *Duration:**
  • *1–2 months**
  • *Commitment:**
  • *15–25 hours/week, with flexibility up to 40 hours/week**
  • *Role Responsibilities**
  • Design benchmark tasks by ideating a vulnerability class and validating the intended exploit behavior.
  • Create or validate small runnable codebases that include ingestion and prompt/tool usage where the trust boundary is violated.
  • Validate the attack via an exploit script and document the unsafe behavior clearly.
  • Validate implementation of a patch that prevents the exploit and verify the fix is effective.
  • Produce task metadata such as severity mapping, exact file/line locations, impact analysis, remediation summary, and references.
  • Conduct review and quality control to ensure paths resolve, line ranges are correct, labels aren’t leaked, and the fix blocks the exploit.
  • *Qualifications**
  • *Must-Have**
  • 2+ years of experience in software engineering, with a focus on application security, vulnerability research, or secure software engineering.
  • Degree in Software Engineering, Computer Science, or a related field (Bachelor's minimum; advanced degree preferred).
  • Strong proficiency in Python, JavaScript, TypeScript, or other common languages found in open-source projects.
  • Familiarity with version control workflows (Git, PRs, issue tracking).
  • Comfortable articulating technical reasoning in clear, structured writing.
  • *Start Date**
  • Immediate
  • *Application Process (Takes 20–30 mins to complete)**
  • Upload resume
  • AI interview: A short, 15-minute conversational session to understand your background, experience, and interest in the role
  • Follow-up communication within a few days with next steps and onboarding details
  • *Resources & Support**
  • For details about the interview process and platform information, please check: https://talent.docs.mercor.com/welcome/welcome
  • For any help or support, reach out to: support@mercor.com
  • PS: Our team reviews applications daily. Please complete your AI interview and application steps to be considered for this opportunity.*

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