Principal Engineer, Generative AI

Job Description:• Own the technical vision for the GenAI platform including retrieval-augmented pipelines, vector-search, fine-tuning, and evaluation harnesses• Architect and ship investigative agents that ingest terabytes of transactional and case data, reason over heterogeneous knowledge graphs, and generate fully auditable explanations• Lead model strategy: select OSS vs commercial LLMs, run parameter-efficient tuning, implement safety and bias mitigations• Design MLOps/GPU infrastructure for low-latency inference and predictable bolthires per investigation• Introduce robust evaluation and guard-rails including automated red-teaming, toxicity filters, PII leak detection, and latency/bolthires dashboards• Mentor a senior engineering team through design reviews, pair programming, and knowledge-sharing• Partner with Product and Compliance to translate AML workflows and regulatory requirements into agent toolsets• Prototype state-of-the-art techniques and assess fit for productionRequirements:• 10+ years software/ML experience• 4+ years building deep-learning or NLP systems• At least 2 years directly on LLM or GenAI products• Track record of architecting production GenAI systems at scale in the cloud (GCP/AWS)• Deep understanding of RAG, vector DBs, prompt-engineering patterns, and evaluation metrics• Expert in Python with hands-on experience with PyTorch• Demonstrated leadership as Staff+ IC or Tech-Lead Manager, guiding 65 engineers on ambiguous 0 120 initiatives• (Bonus) Prior exposure to fraud-tech, payments, or AML domains• (Bonus) Published research / open-source contributions in LLM safety, retrieval, or agentic frameworksBenefits:• Competitive salary and pre-IPO stock options• 100% company-paid medical, dental and vision insurance (for employee)• Optional HSA and FSA medical reimbursement accounts• Unlimited paid time off• Generous leave programs for life events• 401(k)• Charity matching• Annual Learning & Development stipend• One-time Home office set-up stipend• Commuter benefits• Happy hours and team-building events• Great office space in the San Francisco Financial District• Fully stocked kitchen• Lunch provided in SF office multiple times a week• Emphasis on diversity, equity and inclusion Apply tot his job