Senior Software Applied AI Engineer

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, 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.

Senior Software Applied AI Engineer

Remote Location : Seattle, WA

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 Staff 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 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 Seattle, WA . We believe this balance of proximity and flexibility gives Hackerone's 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

Build and evolve 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

Collaborate with product teams to integrate AI capabilities that enhance vulnerability discovery, validation, and remediation

Create APIs and integrations that enable seamless interaction between AI models, security tools, and the broader HackerOne ecosystem

Partner with cross-functional teams including Product, Security Research, and Customer Success to translate AI innovations into customer-facing security solutions

Integrate emerging agentic frameworks and LLM-based orchestration tools (e.g., LangChain, Semantic Kernel, AutoGen, OpenAgents) to power stateful AI agents with access to security tools, APIs, and third-party systems

Stay current with emerging AI security threats, research cutting-edge AI safety techniques, and contribute to the development of industry-leading AI security standards

Minimum Qualifications

5+ years of experience as a software engineer

Experience building production-grade AI platforms and infrastructure that support multiple AI product teams and applications

Strong hands-on experience with large language models (LLMs), generative AI, and machine learning frameworks (TensorFlow, PyTorch, Transformers) in production environments

Expertise in AI platform engineering including model deployment, MLOps pipelines, model serving infrastructure, and shared AI services architecture

Solid understanding of AI safety and alignment principles, including responsible AI development, bias mitigation, and ethical AI practices

Preferred Qualifications

Experience building AI development platforms, model registries, experimentation frameworks, and tools that accelerate AI product development across organizations

Familiarity with frameworks like ReAct, AutoGen, or Semantic Kernel for agentic orchestration

Experience in agent action routing, secure tool usage APIs, and feedback loops for autonomous agents

Knowledge of prompt engineering, fine-tuning techniques, retrieval-augmented generation (RAG), and advanced LLM optimization strategies

Background with cloud-based AI / ML services (AWS Bedrock, GCP Vertex AI, Azure ML) and containerization technologies for AI workloads

Familiarity with Ruby on Rails, GraphQL, React, and experience integrating AI capabilities into existing web applications and APIs

Compensation Bands : Seattle, WA

$170K – $250K

• Offers Equity

Job Benefits :

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

We're committed to building a global team! For certain roles outside the United States, India, the U.K., and the Netherlands, we partner with Remote.com as our Employer of Record (EOR).

Visa / work permit sponsorship is not available.

Employment at HackerOne is contingent on a background check.

HackerOne is an Equal Opportunity Employer in the terms and conditions of employment for all employees and job applicants without regard to race, color, religion, sex, sexual orientation, age, gender identity or gender expression, national origin, pregnancy, disability or veteran status, or any other protected characteristic as outlined by international, federal, state, or local laws.

This policy applies to all HackerOne employment practices, including hiring, recruiting, promotion, termination, layoff, recall, leave of absence, compensation, benefits, training, and apprenticeship. HackerOne makes hiring decisions based solely on qualifications, merit, and business needs at the time.

For US based roles only : Pursuant to the San Francisco Fair Chance Ordinance, all qualified applicants with arrest and conviction records will be considered for the position.

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