Principal Engineer, Generative AI

Job not on LinkedIn

September 24

🏄 California – Remote

Although this job is listed in California, this company may be open to hiring remote in other states.

💵 $250k - $350k / year

⏰ Full Time

🔴 Lead

🧑‍💻 Full-stack Engineer

🦅 H1B Visa Sponsor

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Unit21

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Fintech • Cybersecurity • Compliance

Unit21 is a customizable platform designed to transform fraud prevention and anti-money laundering (AML) operations. It enables organizations to run custom detection logic, automate investigations, and seamlessly manage regulatory compliance. With features like real-time payment fraud prevention, transaction monitoring, and automated case management, Unit21 provides comprehensive solutions that adapt to unique business needs, ensuring security and efficiency in the financial technology space.

51 - 200 employees

Founded 2018

💳 Fintech

🔒 Cybersecurity

📋 Compliance

💰 $34M Series B on 2021-07

📋 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 cost per investigation • Introduce robust evaluation and guard-rails including automated red-teaming, toxicity filters, PII leak detection, and latency/cost 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 production

🎯 Requirements

• 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 0120 initiatives • (Bonus) Prior exposure to fraud-tech, payments, or AML domains • (Bonus) Published research / open-source contributions in LLM safety, retrieval, or agentic frameworks

🏖️ Benefits

• 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