The Browser Company · 1 month ago
Staff Security Software Engineer, Assistant Safety
United States
Full-time
Remote
Senior Level, Lead/Staff
$225K/yr - $300K/yr
5+ years expThe Browser Company is building a better way to use the internet through an innovative browser. As a Security Software Engineer, you will lead the development of security features for the Dia product, focusing on AI-driven risks and collaborating with multiple teams to ensure a secure user experience.
Digital MediaInternetWeb Browsers
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
Drive the creation and evolution of security metrics and dashboards to measure and communicate impact across the organization
Join our team’s on-call rotation, helping the team keep our services reliable and responding to production and security incidents
Qualification
Required
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 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
Preferred
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
Benefits
Benefits: We offer a wide range of perks and benefits designed to support you, your family, and help you engage with your local community.
Company
The Browser Company
The Browser Company is a software company that designs and operates web browser for internet users.
51-200 employees
H1B Sponsorship
The Browser Company has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2023 (1)
2022 (1)
Funding
Current Stage
Growth StageTotal Funding
$68MKey Investors
Pace Capital
2025-09-04Acquired
2024-03-21Series B· $50M
2022-05-25Series A
Leadership Team
Adena Bauer
Membership Lead
Tara Feener
Head of Engineering
Recent News
2026-01-07
2025-11-10
2025-11-07
Company data provided by crunchbase