Staff Software Engineer, Applied AI

HackerOne

. Architect and enhance the autonomous security agent “Hai,” enabling natural-language reasoning, vulnerability detection, and actionable recommendations .

Posted 10/27/2026full-timeSeattle • Washington • United StatesLead💰 $200,000 - $256,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive expertise in building and maintaining production-grade AI platforms, with a strong focus on large language models, generative AI, and AI safety principles. Capable of integrating AI capabilities into production environments while ensuring responsible AI development and ethical practices.

Highest-signal resume keywords

Large Language Models (LLMs)AI Platform EngineeringMLOps PipelinesAI Safety PrinciplesCloud-Based AI/ML Services

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Machine Learning FrameworksModel DeploymentPrompt EngineeringRetrieval-Augmented Generation (RAG)Advanced LLM OptimizationAI Development PlatformsModel RegistriesExperimentation FrameworksAgent Action RoutingFeedback Loops

Tools & Technologies

TensorFlowPyTorchTransformersAWS BedrockGCP Vertex AIAzure MLDockerKubernetesRuby on RailsGraphQL

Industry Keywords

Generative AIAI Red-TeamingEthical AI PracticesBias MitigationAgentic AI Patterns

Tech Stack

Tools & technologies

AWSAzureCloudDockerGoogle Cloud PlatformGraphQLKubernetesPyTorchReactRubyRuby on RailsTensorflow

About the role

Key responsibilities & impact

Architect and enhance the autonomous security agent “Hai,” enabling natural-language reasoning, vulnerability detection, and actionable recommendations
Build components and services integrating agentic AI patterns including orchestration, memory systems, RAG, long-horizon tasks, and LLM-based models
Partner with Product, Security Research, and Engineering to introduce AI capabilities across the HackerOne ecosystem
Design and implement AI red-teaming agents and frameworks to surface weaknesses in LLMs, generative-AI systems, and applied AI deployments
Establish metrics, observability, evaluation frameworks, and continuous feedback loops to improve model performance, safety, and user impact
Track emerging AI safety research, adversarial-testing techniques, and agentic-system patterns and integrate learnings into HackerOne’s responsible-AI strategy
Build APIs and integrations connecting AI models, security tools, and the broader HackerOne platform
Report to the VP, AI Engineering

Requirements

What you’ll need

8+ years of experience as a software engineer
Deep experience building and maintaining production-grade AI platforms and infrastructure
Must be able and willing to come to the office once per week, typically Thursdays
Expertise in large language models (LLMs), generative AI, and machine learning frameworks such as TensorFlow, PyTorch, and Transformers in production environments
Strong hands-on experience in AI platform engineering, including model deployment, MLOps pipelines, model serving infrastructure, and shared AI services architecture
Experience building systems that support multiple AI product teams and applications
Solid understanding of AI safety and alignment principles, including responsible AI development, bias mitigation, and ethical AI practices
Experience building AI development platforms, model registries, experimentation frameworks, and tools that accelerate AI innovation across organizations
Familiarity with ReAct, AutoGen, or Semantic Kernel for agentic orchestration and multi-agent collaboration
Experience in agent action routing, secure tool usage APIs, and feedback loops for autonomous agents
Knowledge of prompt engineering, fine-tuning, retrieval-augmented generation (RAG), and advanced LLM optimization strategies
Experience with cloud-based AI/ML services such as AWS Bedrock, GCP Vertex AI, and Azure ML
Experience with containerization technologies such as Docker and Kubernetes for AI workloads
Familiarity with Ruby on Rails, GraphQL, and React
Experience integrating AI capabilities into production web applications and APIs
Employment contingent on a background check
Visa/work permit sponsorship is not available

Benefits

Comp & perks

Health (medical, vision, dental), life, and disability insurance
Equity stock options
Retirement plans
Paid public holidays and unlimited PTO
Paid maternity and parental leave
Leaves of absence, including caregiver leave and leave under CO's Healthy Families and Workplaces Act
Employee Assistance Program
Flexible Work Stipend