Kastle Systems International
Staff AI Engineer
San Francisco · Staff+
Sponsorship not specifiedDetected 242 days ago
Machine LearningData EngineeringLLMsCommunication
About the role
- As a Founding Applied AI Engineer, you'll be instrumental in building the technical foundation of Kastle's AI platform. You'll fine-tune large language models, design AI workflows for highly regulated enterprises, and ensure our voice agents deliver precise, compliant, and effective borrower interactions.
- This role is ideal for an engineer who is passionate about applied AI, eager to solve real-world challenges, and excited to build the technical foundation of an early-stage AI startup.
- As a Founding Applied AI Engineer, you'll be instrumental in building the technical foundation of Kastle's AI platform.
Responsibilities
- Prompt Engineering: Design and iterate on prompt strategies to optimize AI performance and compliance
- Evaluate LLMs and AI Agents: Build high quality evals using our proprietary datasets to benchmark AI agent performance and run experiments
- Custom AI Solutions: Train and implement domain-specific AI models for consumer lending
- Data Pipelines & APIs: Build robust AI-driven workflows that integrate seamlessly with loan servicing platforms
- 2+ years building and deploying ML/AI systems in production environments
- Excellent communication skills to collaborate across product, engineering, and compliance teams
- Design and iterate on prompt strategies to optimize AI performance and compliance
Requirements
- Experience with LLM orchestration frameworks (LangChain, LlamaIndex, or similar)
- Track record of shipping AI products that real users depend on
- Strong product mindset and ability to translate business requirements into AI solutions
Compensation
- Strong upside: Competitive salary, meaningful early-stage equity, and relocation support
Benefits
- Competitive salary, meaningful early-stage equity, and relocation support
- Strong proficiency in Python and deep learning frameworks (TensorFlow, PyTorch)
Company info
- Kastle is building AI operating system for consumer lending, starting with mortgage.
- We work with some of America's largest mortgage lenders, helping them scale their contact center and compliance operations using AI-driven voice agents.
- Backed by Y Combinator, Commerce Ventures, and executives from Snapdocs, Google, and WePay, we are redefining lending with AI.
- High ownership and autonomy with direct input on product, technical direction, and company culture
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