The Browser Company - Staff Security Engineer, Offensive AI
Requirements
• 8+ years in offensive security — vulnerability research, exploit development, red teaming, or product security testing — with a record of finding real bugs in software other people had already reviewed. • Depth in at least one hard surface: LLM agent systems, browser or Chromium internals, OS sandboxing and native clients, or backend and cloud infrastructure — and the excitement to learn the rest. • Practical fluency using LLMs as instruments, not just as targets, plus a working sense of when their output is noise. • You write production-quality code in one or more of Go, TypeScript, Python, or Swift. You'd rather build the thing that finds a bug a thousand times than find it once. • You write findings engineers act on, and you can stay in the fix conversation and push for the durable version without owning the remediation yourself. • You thrive in a high-trust, high-ambiguity environment: you seek feedback, but you don't need hand-holding. • You resonate with our company values. • We're primarily focused on hiring in North American time zones and require that folks have 4+ hours of overlap time with team members in Eastern Time Zone.
Responsibilities
• Run original offensive research against Dia, its agent, and backend services, focusing on prompt injection and indirect exfiltration, tool-call abuse, permission and provenance bypass, sandbox escape, cross-profile data access, quota and abuse-scoring bypass. • Threat model new surface areas with the teams building them, and review features before they ship, identifying what is exploitable, what it costs an attacker, and what would have to be true to launch. • Design and build automated vulnerability discovery including model-driven code and infrastructure scanning, fuzzing harnesses, and agentic hunting pipelines that keep working after the engagement ends. • Eliminate entire classes of bugs in collaboration with the engineers who own the fix, then make the same issue structurally hard to reintroduce through an enforced invariant, a fail-closed default, a test, a lint, or a platform change. • Set the standard for what "security tested" means before a feature ships, and raise the ceiling on what the whole team can find. • Technical Projects You'll Shape With Us… • Continuous AI-assisted vulnerability discovery (first project). You’ll survey commercial scanning services, frontier models, open-source security models, and stand up a working mix against our codebase, our infrastructure, and the agent runtime. • Continuous AI-assisted vulnerability discovery (first project). • Agent red teaming. Plan and run regular AI-assisted red team exercises against Dia and our infrastructure, and build the attack corpus and harness that make each round cheaper than the last. • Agent red teaming. • Pre-launch review as a practice. New tools and integrations, agent capabilities, enterprise controls, platform expansion. Enhanced with platforms to assist with testing • Pre-launch review as a practice. • Structural fixes that eliminate classes of vulnerability. Define, with the product engineers, the changes that take a whole bug class off the table instead of fixing the same issue one report at a time. • Structural fixes that eliminate classes of vulnerability. • Future tools and systems. The state of the art in vulnerability hunting is evolving faster than it ever has. We expect this person to track it and keep BCNY best in class, which means therea re opportunities to build far beyond the scope described above. • Future tools and systems.
Benefits
• Our total compensation for full-time employees includes base salary, equity, and comprehensive benefits. The annual base salary range for this role is $225,000-$300,000 USD. The final offer will depend on your experience, expertise, and interview performance. Our goal is simple: if it feels like the right mutual fit, compensation shouldn’t be the thing that gets in the way. We’ve built a small, talent-dense team who cares deeply about their craft, and we pay competitively in line with current market benchmarks. • $225,000-$300,000 USD • Benefits. We offer best-in-class benefits (https://go.atlassian.com/perksandbenefits) designed to support you, your family, and your life outside of work. Think big-company perks with startup-style impact, ownership, and ways of working — so you have the space and support to do the best work of your career. • Location. We’re a remote-friendly company and can hire in the US or Canada. If you live in New York (or want to visit), you’re welcome to work from our office in Williamsburg. • Location. • The Browser Company is an ambitious team of close to 100 people (and growing!) who are passionate about building great products. We are a remote-first, distributed team, with the option to work from office in Brooklyn, New York. We strongly support diversity and encourage people from all backgrounds to apply. 🚙 To read more about what we value as a company, check out Notes on Roadtrips on our blog.
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