Principal Software Engineer, AI

About HackerOne

HackerOne is a global leader in offensive security solutions. Our HackerOne Platform combines AI with the ingenuity of the largest community of security researchers to find and fix security, privacy, and AI vulnerabilities across the software development lifecycle. The platform offers bug bounty, vulnerability disclosure, pentesting, AI red teaming, and code security. We are trusted by industry leaders like Amazon, Anthropic, Crypto.com, General Motors, GitHub, Goldman Sachs, Uber, and the U.S. Department of Defense. HackerOne was named a Best Workplace for Innovators by Fast Company in 2023 and a Most Loved Workplace for Young Professionals in 2024.

HackerOne is at a pivotal inflection point in the security industry. Offensive security is no longer optional – it is the standard for forward-thinking companies that want to build trust and resilience in a world where AI-driven innovation and adversaries are moving faster than ever. With the industry shifting, HackerOne stands apart: we combine the ingenuity of the largest security research community with a best-in-class AI-powered platform, trusted by the world’s top organizations.

HackerOne Values

HackerOne is dedicated to fostering a strong and inclusive culture.

• Customer Obsessed: Prioritizes customer outcomes in our decisions and actions.
• Default to Disclosure: Operates with transparency and integrity, ensuring trust and accountability.
• Win Together: Fosters empowerment, inclusion, respect, and accountability.

Job Details

• Salary: $250K - $420K
• Location Type: Remote
• Employment Type: FullTime

Principal Software Engineer, AI

• Location: Seattle, WA; San Francisco Bay Area

Position Summary

At HackerOne, we're revolutionizing cybersecurity by combining human intelligence with artificial intelligence to create the world's most effective offensive security platform. As a Principal Software Engineer on our AI Platform team, you'll be at the forefront of developing cutting-edge AI-powered security solutions that protect organizations from emerging threats. You'll work directly on our AI platform, contribute to our in-platform AI security agent "Hai," and help build next-generation AI safety and security tools that serve thousands of companies including Amazon, Anthropic, GitHub, Goldman Sachs, and the U.S. Department of Defense.

We're seeking an engineer who shares our mission to empower the world to build a safer internet through AI-driven security innovation. You'll harness artificial intelligence to help organizations and developers create more secure software, detect vulnerabilities faster, and defend against emerging threats. Working alongside our global community of security researchers, you'll build AI tools that make cybersecurity more accessible and effective for everyone.

At HackerOne, we embrace a Flexible Work approach, enabling our team members to work remotely while maintaining productivity and collaboration. We are seeking candidates located in Seattle, WA, and the surrounding metropolitan areas, to facilitate occasional in-person interactions as needed. While the position is primarily remote, there will be periodic in-person requirements to support team collaboration and foster stronger connections. This approach ensures flexibility while providing opportunities to build meaningful in-person relationships that strengthen our team and company culture.

What You Will Do

• Lead architecture and evolution for our autonomous AI security agent “Hai” with capabilities to plan, reason, and take secure actions including vulnerability detection, threat intelligence generation and automated security analysis
• Build and enhance our AI security agent "Hai" to provide instant security insights, natural language query processing, and actionable recommendations for security teams
• Develop AI red teaming agents and frameworks that help identify vulnerabilities in large language models, generative AI systems, and applied AI deployments