Staff Product Security Engineer

WHY HARVEY At Harvey, we’re transforming how legal and professional services operate. By combining frontier agentic AI, an enterprise-grade platform, and deep domain expertise, we’re reshaping how critical knowledge work gets done for decades to come. This is a rare chance to help build a generational company at a true inflection point. With 1500+ customers in 60+ countries, strong product-market fit, and world-class investor support, we’re scaling fast and defining a new category in real time. The work is ambitious, the bar is high, and the opportunity for growth — personal, professional, and financial — is unmatched. Our team moves fast, takes ownership, and is deeply committed to the mission — operating with intensity, staying close to our customers, and pushing each other for excellence. We live by three values: Decisiveness, Simplicity, and Job's Not Finished. We act quickly on clear judgment over perfect information, we believe simplicity is what scales, and we're never satisfied with where we are. If you want to do the best work of your career alongside people who share that drive, we'd love to build with you. At Harvey, the future of professional services is being written today — and we’re just getting started. ROLE OVERVIEW As a Staff Software Engineer on the Product Security team at Harvey, you'll play a critical role in shaping how security is built into our AI platform from the ground up. We store and process our customers’ most sensitive data, and as a result, security is paramount at every stage of our product lifecycle. You'll take ownership of securing critical parts of the product while driving high-leverage security initiatives that raise the bar for the entire engineering org — balancing hands-on technical work with cross-functional leadership and mentorship. This is a rare opportunity to define and build a product security program at a company scaling fast. Our security program is driven by our collective offensive security experience: breaking into systems at other companies (in white-hat capacities), responding to real security incidents, and learning from other companies’ data breaches. We regularly conduct penetration tests and red team exercises with external security firms. At the same time, we are all software engineers - contributing code daily and approaching security with an engineering-first mindset. WHAT YOU'LL DO - Define and own the product security roadmap, prioritizing initiatives based on risk, business impact, and engineering org maturity. - Establish and evolve security posture across the engineering organization, setting standards that scale with the company - Partner with Product Engineering, Infrastructure, and Platform teams to incorporate secure design principles at every stage of development - Own and review security-critical code across key parts of the product, including authentication and access control - Architect secure-by-default libraries and tools that make the secure path the easiest choice for developers - Drive mitigation strategies during security-related incident responses, coordinating cross-functional efforts - Mentor engineers and raise the security bar across teams through code reviews, design reviews, and technical guidance WHAT YOU HAVE - 8+ years of experience in product security, application security, offensive security, and/or security-focused software engineering - Long track record of identifying and remediating software vulnerabilities, demonstrated through CVEs, bug bounty awards, published research, or prior work experience - Track record of leading complex cross-functional security initiatives and delivering measurable improvements, with demonstrated ability to influence engineering teams without direct authority. - Experience mentoring senior engineers and developing security talent within an engineering organization - Strong programming skills with demonstrated experience writing high-quality, production software - Excellent communication and collaborat