Product Engineer

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.

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.

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).

Drive product feedback: Partner with Engineering; submit crisp RFCs backed by usage data to influence the roadmap.

Proactive account management: Monitor health, predict risk, and execute save/expansion plays based on telemetry.

Foundational leadership: Help hire and mentor the future Product & FDE team; set standards as we scale.

Customer-obsessed: You care deeply about measurable outcomes and long-term partnerships.