Remote Staff Offensive AI Security Researcher

OpenKrill; United States; Remote; USD 225,000 - 300,000; Full time

Benefits offered by this job

Remote-friendly

Office in Williamsburg

Job summary

The Browser Company is seeking a Staff Security Researcher to advance offensive security for Dia, its browser-enhanced agent. You will run tests against the client, agent runtime, and backend services, modeling threats before features ship and helping design resilient systems.

Work closely with engineers to build automated vulnerability discovery pipelines and red-team exercises, while raising the security bar across the product and infrastructure teams.

Qualifications

• 8+ years in offensive security with a track record of finding real bugs.
• Experience with LLM agent systems, browser internals, or OS sandboxing.
• Fluent in Go, TypeScript, Python, or Swift and production-grade code.
• Ability to model threats and design automated vulnerability discovery.
• Comfort working in high-trust, high-ambiguity environments.

Responsibilities

• Run original offensive research against Dia, its agent, and backend services.
• Threat model new surfaces with product teams and review features pre-release.
• Design automated vulnerability discovery pipelines and fuzzing harnesses.
• Collaborate with engineers to fix issues and prevent reoccurrence.
• Set security testing standards before features ship, raising team capabilities.

Skills

Offensive security

LLM agent systems

Browser internals

OS sandboxing

Backend & cloud

Go

TypeScript

Python

Swift

Code quality

Eastern Time overlap

Job description

The Browser Company is seeking a Staff Security Researcher to advance offensive security for Dia, its browser-enhanced agent. You will run tests against the client, agent runtime, and backend services, modeling threats before features ship and helping design resilient systems.

Work closely with engineers to build automated vulnerability discovery pipelines and red-team exercises, while raising the security bar across the product and infrastructure teams.