Kastle AI
Staff AI Engineer
$250K–$350K
San Francisco · On-site · Staff · Full-time · Posted Nov 22, 2025
- Experience
- 3+ years building and deploying ML/AI systems in production environments.
About the job
Build Kastle’s AI platform for financial institutions, developing and deploying AI models and workflows for borrower interactions, lending, and loan servicing.
What you'll do
- Fine-tune, deploy, and evaluate LLMs and AI agents for real-time voice-based borrower interactions.
- Build domain-specific AI models, prompts, data pipelines, APIs, and workflows for consumer lending and loan servicing.
- Monitor and optimize agent performance while ensuring solutions meet regulatory standards, including FDCPA, RESPA, and TILA.
What they ask for
- 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 central to company operations.
Pay
$250K – $350K (currency not stated; compensation type not stated)
Tools
Python, TensorFlow, PyTorch, LangChain, LlamaIndex
AI focus
Applied AI for consumer lending and financial services, including fine-tuning and deploying LLMs, voice agents, AI workflows, model evaluation, and compliance-focused optimization.
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