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Portfolio Jobs

Looking for your next role? Take a look at these exciting jobs at Sapphire Ventures’ portfolio companies. Our Talent team is passionate about connecting you to your dream job!

Lead AI Engineer

JupiterOne

JupiterOne

Software Engineering, Data Science
United States
Posted on Aug 26, 2025

JupiterOne is a cyber asset attack surface management (CAASM) platform company providing visibility and security into your entire cyber asset universe. Using graphs and relationships, JupiterOne provides a contextual knowledge base for an organization's cyber asset operations. With JupiterOne, teams can discover, monitor, understand, and act on changes in their digital environments.

We're launching Juno, an AI-powered security coworker that transforms our vast asset graph into actionable insights through natural conversation. JUNO goes beyond traditional chatbots—it takes ownership of security outcomes, from investigation to resolution.

As a Lead AI Engineer, you will architect and build the core AI systems that power our next-generation agentic security platform. You'll be responsible for designing scalable AI infrastructure that can process millions of assets and billions of relationships while delivering sub-2-second response times to users.

What You'll Do

  • Design and implement agentic AI architectures using frameworks like LangGraph, CrewAI, or similar multi-agent orchestration platforms
  • Build graph-aware AI systems that leverage JupiterOne's knowledge graph for context-aware reasoning and decision making
  • Implement advanced RAG pipelines that intelligently traverse graph relationships to provide contextual security insights
  • Integrate Model Context Protocols (MCPs) to enable seamless AI-to-system communication
  • Develop intelligent query translation engines that convert natural language to complex graph queries
  • Build workflow automation systems that can execute multi-step security remediation tasks
  • Design API layers that enable seamless integration between AI agents and external security tools
  • Implement event-driven architectures for real-time security monitoring and response
  • Ensure lightning fast response times for AI-powered conversations across millions of assets
  • Design fault-tolerant systems with 99.9% uptime SLA for production AI workloads
  • Implement comprehensive monitoring and observability for AI system performance and accuracy
  • Build auto-scaling infrastructure that handles variable AI workloads efficiently

Who You Are:

  • 2+ years working with large language models (OpenAI, Anthropic, open-source) in production
  • 4+ years building and deploying AI/ML systems in production environments
  • Deep experience with agentic AI frameworks (LangGraph, CrewAI, AutoGen) and multi-agent orchestration
  • Hands-on experience with RAG architectures, vector databases, and embedding systems
  • Strong understanding of graph databases (e.g. Neo4j) and graph query languages (Cypher)
  • Experience building AI systems that reason over graph data and complex relationships
  • Knowledge of graph algorithms and how to apply them in AI contexts
  • Experience with high-volume data processing and distributed systems
  • Expert-level system design skills for building scalable, distributed AI applications
  • Experience with cloud infrastructure (AWS, GCP, Azure) and containerization (Docker, Kubernetes)
  • Strong background in API design and building robust, well-documented interfaces
  • Experience with streaming data systems (Kafka, Kinesis) and event-driven architectures
  • Proficiency in Python and modern AI/ML libraries (LangChain, LlamaIndex, Transformers)
  • Strong TypeScript/JavaScript skills for full-stack AI application development
  • Experience with infrastructure as code (Terraform, CloudFormation) and CI/CD pipelines
  • Knowledge of software architecture patterns and design principles

A Plus To Have:

  • Background in cybersecurity, threat modeling, or infrastructure security
  • Experience with security data formats and threat intelligence feeds
  • Understanding of compliance frameworks (SOC2, ISO, HIPAA) and security controls
  • Experience with monte-carlo simulations and building models for risk quantification
  • Experience with fine-tuning and optimizing LLMs for domain-specific tasks
  • Knowledge of prompt engineering and advanced LLM techniques
  • Familiarity with AI safety and alignment best practices
  • Experience with model evaluation and monitoring in production
  • Experience leading technical teams and mentoring engineers
  • Track record of shipping AI-powered products from conception to production
  • Strong communication skills for explaining complex AI systems to diverse stakeholders
  • Medical, Dental, Vision Insurance etc.
  • Flexible PTO
  • Maternity & Paternity Paid Leave
  • Reimbursement for Gym Memberships and/or Fitness Equipment
  • Wellness Program Offerings
  • 401(k), Life Insurance, Short and Long Term Disability
  • Paid Holidays, including JupiterOne Day on July 21st.
  • Generous Employee Referral Program
  • & SO much more!