Staff AI Engineer
KastleMortgage Servicing company
San Francisco, United StatesLead
Y Combinator
Commerce Ventures
Data & AI
About the role
TL;DR
Build the technical foundation of Kastle's AI platform for consumer lending.
- •As a Founding Applied AI Engineer, you'll build the technical foundation of Kastle's AI platform, fine-tuning large language models and designing AI workflows for highly regulated enterprises.
- •Key Responsibilities AI Model Integration: Fine-tune and deploy LLMs for real-time voice-based borrower interactions Prompt Engineering: Design and iterate on prompt strategies to optimize AI performance and compliance Evaluate LLMs and AI Agents: Build high quality evals using proprietary datasets to benchmark AI agent performance and run experiments Custom AI Solutions: Train and implement domain-specific AI models for consumer lending Scalability & Compliance: Ensure AI solutions meet regulatory standards (FDCPA, RESPA, TILA) and scale efficiently Requirements 3+ years building and deploying ML/AI systems in production environments Strong proficiency in Python and deep learning frameworks (TensorFlow, PyTorch) Experience with LLM orchestration frameworks (LangChain, LlamaIndex, or similar) Track record of shipping end to end AI systems that is at the core of company operations Strong product mindset and ability to translate business requirements into AI solutions Excellent communication skills to collaborate across product, engineering, and compliance teams
Required skills
PythonTensorFlowPyTorchLangChainLLMsProduct ManagementEngineering Management
Domain expertise
fintech
Benefits & perks
Competitive Compensation + Meaningful Equity at a high growth company, Free Health and Wellness Membership, Robust medical, vision, & dental coverage, 401(K) plan offering, Paid Company Meals, Company offsites to get to know the team
Tech stack
PythonTensorFlowPyTorchLangChain