The Browser Company is looking for a Staff Security Software Engineer, Assistant Safety to lead and ship security features for the Dia product, focusing on AI security and threat modeling. You will drive security architecture across client and backend surfaces with an AI-first lens as we build a better way to use the internet.
What You'll Do
- Design and ship AI security features in the Dia product and Prompt Safety service.
- Drive Dia’s security architecture and threat modeling across client and backend surfaces with an AI-first threat lens.
- Develop AI-aware defenses including guardrails against prompt injection/jailbreaks, output filtering/policy enforcement, red teaming/adversarial testing, and incident playbooks.
- Establish metrics and dashboards tracking the effectiveness of security infrastructure and AI defense.
- Architect and deliver AI security features including LLM protections, AI fuzzing integration, managed accounts, and advanced authentication/authorization controls.
- Architect and implement LLM assisted fuzzing for Dia’s Assistant and the Prompt Safety Service.
- Collaborate with engineering and product teams to embed secure-by-default patterns and frameworks throughout Dia’s codebase.
- Drive the creation and evolution of security metrics and dashboards to measure and communicate impact.
- Join the team’s on-call rotation, helping keep services reliable and responding to production and security incidents.
What We're Looking For
- 5+ years leading large-scale security engineering projects and shipping security features in production.
- Strong coding skills in one or more of: Golang, Swift, TypeScript, or Python.
- Comfortable working across native client and backend services.
- Excellent cross-functional communication; able to align and coordinate across Product, Infra, IT, and Legal.
- Privacy-minded with a bias for high-velocity execution and clear prioritization.
- Team is based in North American time zones and require 4+ hours of overlap time with team members in Eastern Time Zone.
- You resonate with our company values.
Nice to Have
- Familiarity with client side software development.
- Familiarity with browser or Chromium development a plus.
- Familiarity with AI/LLM security risks (prompt injection, tool-use abuse, data exfiltration) and practical guardrail patterns.
Technical Stack
- Golang
- Swift
- TypeScript
- Python
Team & Environment
You will report to the Head of Security, working closely with Product, Infra, IT, and Legal teams. The company is close to 100 people and growing.
Benefits & Compensation
- Salary: $225,000-$300,000 USD annual salary range + equity.
- A wide range of perks and benefits designed to support you, your family, and help you engage with your local community.
Work Mode
This role is remote-friendly, open to any country where Atlassian has a legal entity. You also have the option to work from our Williamsburg office in New York.
We strongly support diversity and encourage people from all backgrounds to apply.
