About Kastle

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 $2.3M from Y Combinator, Commerce Ventures, and executives from Snapdocs, Google, and WePay, we are redefining lending with AI.

About the Role

You’re joining at an inflection point. As a Product Engineer , you’ll build the playbooks, processes, and relationships that define how Kastle partners with technical customers for long-term success. You’ll be both strategist and hands-on operator.

What You’ll Do

• Be a trusted technical advisor: Guide customers on integrating Kastle into CI/CD and production stacks (APIs, webhooks, auth, SIP/Twilio flows, STT/TTS, LLM configs).

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