The Browser Company is building a better way to use the internet with their AI Browser, Dia. They need a Security Software Engineer to lead and ship security features for Dia, addressing AI-driven risks and ensuring the product is secure by default.
Requirements
- 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.
- 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.
Responsibilities
- Design and ship AI security features in the Dia product and our 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 that make our systems intrinsically secure, with guardrails against prompt injection/jailbreaks, output filtering/policy enforcement, red teaming/adversarial testing, and incident playbooks.
- Establish metrics and dashboards tracking the effectiveness of our security infrastructure and AI defense to guide priority and measure impact.
- Architect and deliver AI security features for Dia, including building out the future of 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.
Other
- Excellent cross-functional communication; able to align and coordinate across Product, Infra, IT, and Legal to deliver high-impact outcomes quickly.
- Privacy-minded with a bias for high-velocity execution and clear prioritization.
- Our team is based in North American time zones and require that folks have 4+ hours of overlap time with team members in Eastern Time Zone.
- You resonate with our company values.
- The Browser Company is an ambitious team of close to 100 people (and growing!) who are passionate about building great products.
