Product Security Engineer (Fully Remote)

Close; United States; Remote; USD 120,000 - 190,000; Full time

Job summary

Close builds a communication-first AI-powered CRM that helps sales teams sell more and faster. With a 120-person 100% remote team they are bootstrapped, profitable and focused on eliminating manual data entry for scaling businesses.

We are seeking a strong application security engineer who writes code, primarily in Python or TypeScript, and can drive security across product features. You will triage findings from HackerOne and internal research, and advance our testing approach with automation

Qualifications

• Strong application security engineer with Python or TypeScript experience.
• Skilled at uncovering vulnerabilities that scanners miss using modern review pipelines.
• Self-directed, able to collaborate across engineering, infra and compliance.

Responsibilities

• Build a recurring product security review program threat model new features and audit high-risk areas.
• Own vulnerability intake and remediation triaging findings from HackerOne scanners and internal research.
• Improve application security testing by combining static analysis dynamic testing and automation.

Skills

Python

TypeScript

Application security

Threat modeling

Tools

HackerOne

Static analysis

Dynamic testing

Automation

Job description

• Build a recurring product security review program threat model new features and audit high-risk areas.
• Own vulnerability intake and remediation triaging findings from HackerOne scanners and internal research.
• Improve application security testing by combining static analysis dynamic testing and automation.

What We’re Looking For:

• Strong application security engineer who writes code with deep Python or TypeScript experience.
• Skilled at finding vulnerabilities conventional scanners may miss using modern AI-assisted review pipelines.
• Self-directed and comfortable working across engineering infrastructure and compliance.

Why Join Close:

• 100% remote 120-person bootstrapped and profitable company with competitive compensation.
• ~5 weeks PTO plus sabbatical every 5 years and generous parental leave.
• Collaborative culture that values long-term thinking transparency and investment in each other.

Close

Close builds a communication-first AI-powered CRM that helps sales teams sell more and faster. With a 120-person 100% remote team they are bootstrapped profitable and focused on eliminating manual data entry for scaling businesses.