Infrastructure Engineer III

HackerOne is a global leader in Continuous Threat Exposure Management (CTEM). The HackerOne Platform unites agentic AI solutions with the ingenuity of the world’s largest community of security researchers to continuously discover, validate, prioritize, and remediate exposures across code, cloud, and AI systems. Through solutions like bug bounty, vulnerability disclosure, agentic pentesting, AI red teaming, and code security, HackerOne delivers measurable, continuous reduction of cyber risk for enterprises. Industry leaders, including Anthropic, Crypto.com http://Crypto.com, General Motors, Goldman Sachs, Lufthansa, Uber, UK Ministry of Defence, and the U.S. Department of Defense, trust HackerOne to safeguard their digital ecosystems. HackerOne was recognized in Gartner’s Emerging Tech Impact Radar: AI Cybersecurity Ecosystem report for its leadership in AI Security Testing and has been named a Most Loved Workplace for Young Professionals (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. HackerOne is Customer Obsessed and prioritizes customer outcomes in our decisions and actions. We Default to Disclosure by operating with transparency and integrity, ensuring trust and accountability. Employees, researchers, customers, and partners Win Together by fostering empowerment, inclusion, respect, and accountability. INFRASTRUCTURE ENGINEER III REMOTE LOCATION: BOSTON, MA; AUSTIN, TX; OR WASHINGTON, DC POSITION SUMMARY As an Infrastructure Engineer IC3, you will contribute to building and operating the infrastructure that supports the HackerOne platform and the thousands of companies that rely on us to manage their security posture. You are a strong individual contributor and collaborative team member with solid domain expertise in cloud infrastructure and reliability. You work effectively within your squad, take ownership of projects, and help improve the reliability, security, and scalability of our systems. You partner closely with application engineers and other stakeholders to deliver pragmatic, secure solutions. You understand how to design and operate highly available cloud systems and apply best practices for reliability, observability, and security. You work cross-functionally with guidance, communicate clearly with stakeholders, and approach problems with a service-oriented mindset. At HackerOne, we embrace a Flexible Work approach that gives us the freedom to do our best work while also fostering the connections and community that make us stronger. Reflecting this philosophy, this is a remote role targeted for candidates within ~50 miles of Boston, Austin, or Washington DC. We believe this balance of proximity and flexibility gives Hackeronies the chance to occasionally come together – fostering collaboration, connection, and in-person moments that enrich our culture – while still preserving the benefits of remote work. WHAT YOU WILL DO First 30 days - Onboard with your squad and the broader engineering organization - Learn HackerOne’s infrastructure, tooling, and workflows (AWS, Terraform, Kubernetes, Ruby on Rails, GraphQL, etc.) - Become familiar with our reliability, security, and incident management practices By 60 days - Participate in the on-call rotation with support from teammates - Take ownership of a scoped infrastructure project and deliver incremental improvements - Build working relationships across engineering and adjacent functions Beyond 90 days - Independently deliver infrastructure ch