Kastle

Join Kastle as a Software Engineer Intern building and shipping production AI agents for major banks and mortgage lenders. You’ll gain hands-on experience across software development, real-time voice and language models, and reliable enterprise deployments.

Build the technical foundation of Kastle’s applied AI platform for consumer lending, including fine-tuned LLMs, voice agents, evaluation systems, and AI-driven workflows. This founding role combines hands-on model development with product ownership in a highly regulated environment.

Join Kastle as a Founder Intern and work directly with the founders to ship products and solve high-priority problems across the business. This is an intense, in-person San Francisco role spanning technical product building, operations, growth, customer support, and sales.

Own the deployment of Kastle’s AI agents for major lending customers, translating borrower workflows into reliable production systems. This customer-facing role combines hands-on backend and full-stack engineering with technical account ownership and product influence.

Build and own high-performance backend systems powering real-time AI voice and compliance workflows for major banks and mortgage lenders. This Staff Engineer role emphasizes low latency, distributed systems, reliability, and production ownership.