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Member of Security Staff

Parameter (fka Hex Security)Security
Pay
$130K–$180K
per year
Work mode
On-site
Full Time
Experience
3+ yrs
Senior

San Francisco, CA at a glance

Rent
#2 of 51
$2,680/mo+46% vs US avg
Weather
#17 of 51
295 mild days0 hot · 0 cold
Income tax
#1 of 51
13.3% top rateCalifornia

What you need

  • 3+ yrs professional penetration testing experience
  • Strong Python/TypeScript software engineering skills
  • Deep web application security knowledge (injection, access control, SSRF)
  • Experience with offensive tooling (Burp Suite, Nuclei) and custom scripts
  • Familiarity with cloud security (AWS/GCP/Azure)

What you'll do

  • Execute penetration tests across web apps, APIs, cloud
  • Review and enhance autonomous agent findings
  • Develop custom exploits, tools, methodologies
  • Contribute production code to improve agent capabilities
  • Produce actionable security assessment reports

We're looking for an Offensive Security Engineer who can bridge the gap between manual penetration testing and our autonomous AI agents. You'll conduct hands-on security assessments across web applications, APIs, and cloud infrastructure while also working to improve the agents that scale that work. You'll review and validate agent findings, develop custom exploits and tooling, and contribute directly to the platform as an engineer.

What you'll do:

Execute penetration tests across web applications, APIs, and cloud environments. Review, validate, and enhance findings generated by our autonomous agents. Develop custom exploits, tools, and methodologies for complex vulnerabilities. Contribute production code to improve agent capabilities and coverage. Produce actionable security assessment reports with clear remediation guidance. Work with customer engineering teams to walk through findings and fixes.

What we're looking for:

3+ years of professional penetration testing or offensive security experience with a track record of identifying critical vulnerabilities. Strong software engineering skills in Python and/or TypeScript. Deep understanding of web application security, including injection flaws, broken access control, authentication bypasses, and SSRF. Experience with common offensive tooling (Burp Suite, Nuclei, custom scripts) and comfort building your own. Familiarity with cloud security across at least one major provider (AWS, GCP, Azure).

Nice to have:

Experience with AI/LLM security, including prompt injection and agent manipulation. Bug bounty track record or published CVEs. Familiarity with OAuth/OIDC and SCIM attack surfaces. Relevant certifications (OSCP, OSWE, OSEP), though we care more about what you can do.


Interview Process

Step 1: Intro call with a founder (30 minutes)

A quick conversation to get to know each other. We'll talk about your background, what you're looking for, and give you a better sense of what we're building and how you'd fit in.

Step 2: Technical challenge (1-2 hours, on your own time)

A practical security assessment. We want to see how you actually approach a target.

Step 3: Paid work trial (1 week)

You'll work alongside us on real tasks. This is the best way for both sides to figure out if it's a good fit.

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About Parameter (fka Hex Security)

Parameter builds AI agents that run continuous penetration tests against your apps and infrastructure. Instead of a once-a-year penetration test, Hex Security's agents works 24/7 to find and verify critical vulnerabilities so you can prevent them before attackers. Formerly Hex Security

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$130K–$180K · Parameter (fka Hex Security)
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