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Horizon3 AI

WebApp Offensive Security Engineer

Horizon3 AI
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about 4 hours ago
Remote, United StatesMid Level / Senior

Base Salary

$196k - $242k/yr

Responsibilities

  • Perform hands-on, full-scope web application penetration tests against real customer applications.
  • Review NodeZero results to identify coverage gaps and missed opportunities.
  • Manually reproduce and validate edge cases, building reliable proof-of-concept exploits.
  • Partner with software engineers to translate findings into product improvements.
  • Build and maintain a library of regression and benchmark test cases.
  • Monitor production pentests for missed findings and create Jira tickets for resolution.
  • Work with customers and internal teams to investigate findings and explain attack paths.
  • Author technical blog posts and research write-ups on new exploits and methodologies.
  • Mentor teammates and contribute to team process improvements.

Requirements

  • Extensive hands-on experience conducting full-scope web application penetration tests.
  • Deep knowledge of web vulnerability classes such as SQL injection and XSS.
  • Ability to find and exploit business-logic and edge-case flaws.
  • Strong command of proxy tools like Burp Suite and browser developer tools.
  • Comfort scripting to reproduce findings and build proof-of-concept exploits.
  • Ability to communicate attack steps and remediation guidance clearly.
  • Curiosity about emerging AI technologies and comfort using AI-assisted tools.
  • Strong written and verbal communication skills.
  • Ability to manage multiple priorities and mentor teammates.
  • History of recognized security research and successful bug bounty contributions.

Benefits

  • Inclusive team culture that values diversity.
  • Growth opportunities within a dynamic and growing team.
  • Collaborative environment that encourages creativity.
  • Hybrid and remote work options available.
  • Competitive salary, equity, and comprehensive benefits including health, vision, and dental insurance.

Tech Stack

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