Senior Security Researcher — Remote Offensive Security

Cobalt; United States; On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

401(k)

Health insurance

Dental & Vision

Equity

Paid time off

Parental leave

Wellness stipend

Learning & development

Work-from-home equipment

Job summary

Cobalt is seeking a Senior Security Researcher to conduct advanced vulnerability research across modern application stacks, cloud infrastructure, and enterprise systems. Your work focuses on identifying critical security flaws, developing PoC exploits, and collaborating with cross-functional teams to improve customer security postures within Cobalt’s Offensive Security Research group.

This fully remote US-based role offers competitive compensation, equity, and benefits as part of our commitment

Qualifications

• 5+ years of dedicated experience in offensive security, vulnerability research, penetration testing, red teaming, or reverse engineering (or 3+ years with a proven track record of published research, CVE disclosures, or open-source security tooling).

Responsibilities

• Conduct deep-dive vulnerability research across Web/API platforms, mobile OS, cloud infra, and enterprise software.
• Identify high-impact vulnerabilities and craft PoC exploit techniques to demonstrate risk.
• Innovate threat models and testing guidelines for cloud, APIs, and AI/ML technologies.
• Collaborate with product/engineering to translate findings into scalable security assessments.
• Mentor junior researchers and participate in public outreach (blogs, advisories, talks).
• Represent Cobalt in the security community through technical publications and conferences.

Skills

Offensive security

Vulnerability research

Penetration testing

Reverse engineering

Python

Go

Bash

Rust

CVE disclosures

Cloud security

Tools

Ghidra

IDA Pro

Binary Ninja

GDB

LLDB

Job description

Cobalt is seeking a Senior Security Researcher to conduct advanced vulnerability research across modern application stacks, cloud infrastructure, and enterprise systems. Your work focuses on identifying critical security flaws, developing PoC exploits, and collaborating with cross-functional teams to improve customer security postures within Cobalt’s Offensive Security Research group.

This fully remote US-based role offers competitive compensation, equity, and benefits as part of our commitment