Staff Software Engineer, Applied AI

Responsibilities

• Architect and enhance HackerOne’s autonomous security agent Hai for natural-language reasoning, vulnerability detection, and actionable recommendations.
• Build agentic AI components and services using orchestration, memory systems, RAG, long-horizon tasks, and LLM-based models.
• Partner with Product, Security Research, and Engineering to integrate AI capabilities across the HackerOne ecosystem.
• Design AI red-teaming agents and frameworks to identify weaknesses in LLMs, generative-AI systems, and applied AI deployments.
• Develop metrics, observability, evaluation frameworks, and feedback loops for model performance, safety, and user impact.
• Build APIs and integrations connecting AI models, security tools, and the broader HackerOne platform.
• Incorporate emerging AI safety research, adversarial testing techniques, and agentic-system patterns into responsible-AI strategy.

Requirements

• 8+ years of software engineering experience, including deep experience building and maintaining production-grade AI platforms and infrastructure.
• Production expertise with large language models, generative AI, and machine learning frameworks including TensorFlow, PyTorch, and Transformers.
• Hands-on experience with AI platform engineering, model deployment, model serving infrastructure, and shared AI services architecture.
• Experience building systems that support multiple AI product teams and applications for scalable experimentation and deployment.
• Understanding of AI safety and alignment principles, responsible AI development, bias mitigation, and ethical AI practices.
• Preferred experience with AI development platforms, model registries, experimentation frameworks, agentic orchestration, multi-agent collaboration, secure tool usage APIs, feedback loops, prompt engineering, fine-tuning, RAG, and LLM optimization.
• Preferred experience with AWS Bedrock, GCP Vertex AI, Azure ML, Docker, Kubernetes, Ruby on Rails, GraphQL, and React.

Benefits

• Medical, vision, dental, life, and disability insurance, with eligibility varying by country.
• Equity stock options and retirement plans.
• Paid public holidays, unlimited PTO, paid maternity and parental leave, and other leaves of absence including caregiver leave.
• Employee Assistance Program and Flexible Work Stipend.
• Flexible remote work targeted to candidates within approximately 50 miles of Seattle, with office attendance typically once per week.
• Employment is contingent on a background check.