--- title: 'Founder Intern (now and Summer 2026) at Kastle' canonical: 'https://feeny.ai/job/founder-intern-now-and-summer-2026-kastle-san-francisco-fk1x0epnjmnc' type: 'job' last_seen: '2026-09-12' --- # Founder Intern (now and Summer 2026) at Kastle - **Company:** Kastle - **Location:** San Francisco, CA - **Employment:** full-time - **Work type:** onsite - **Posted:** 2025-09-09 - **Last confirmed live:** 2026-09-12 - **Apply:** https://jobs.ashbyhq.com/kastle/2c764341-e028-4736-a1a7-0d5faf16e592 ## Job description ## About the role We’re looking for an intern to start asap, in person in San Francisco. As an intern, this will be the most intense, competitive, and transformative experience of your life. You’ll work directly with the founders and a small team of exceptionally smart, driven peers who are building the operating system for consumer lending. You will: - Ship real products. - Touch every part of the business from customer support, growth, operations, engineering, and sales. - Work directly with founders and unblock them - Handle the hardest, most boring, least glamorous tasks — without flinching. - Operate with extreme autonomy in an unstructured, high-paced environment. - Take vague prompts like “build something that helps the company grow” and turn them into working systems — on your own, or by rallying others to help. Ideal candidate: - Relentlessly resourceful - Learns fast, moves faster - Cares about quality - Very Technical - Can start next week If that’s you, email us: founders at kastle dot ai. Just tell us why you’re a fit and add “Founder Intern” in subject. Keep it short. We’ll know. ## About Kastle Kastle is automating manual workflows for the financial services industry using AI agents. We work with the largest mortgage lenders in America and are hiring! ## About Kastle ## Core Business - **Primary industry**: Consumer lending / Mortgage servicing technology (Fintech) - **Target customers**: FDIC-insured banks, independent mortgage banks (IMBs), and large consumer lenders (B2B, Enterprise) - **Mission or purpose statement**: To help traditional financial services companies better interface with their customers by automating high-volume phone calls with compliant AI agents. ## Products & Services - **Avery (Servicing Agent)**: AI voice agent that handles borrower inquiries, payment collection, escrow questions, and loss mitigation. Integrates with ICE’s MSP system. - **Collections Agent**: Automates payment reminders, engages delinquent borrowers early, and recovers past-due accounts. - **Compliance Agent**: Monitors and scores every interaction against regulations (FDCPA, TILA, UDAAP, RESPA, TCPA) for 100% QA coverage. - **Loan Officer Assistant**: Qualifies new loan inquiries and automates pre-qualification calls. - **Sentinel (QA & Compliance Agent)**: Real-time monitoring and automated scorecards for borrower calls and servicing documentation. - **Agent Builder**: Allows lenders to turn SOPs into AI agents using natural language, with no-code configuration. - **Platform features**: Omnichannel support (voice, SMS, email, chat), simulation testing, transparent observability, and integration with existing contact center, payment processor, and LMS systems. ## Market Standing - **Valuation**: Not disclosed (private startup) - **Key Metric**: Total funding of $510,000 (Pre-seed round led by Y Combinator, June 2024) - **Notable Investors/Partners**: Y Combinator (lead), ICE Mortgage Technology (integration partner) - **Growth Signals**: - Headcount: 10 employees (+66.7% YoY) - Won LendingTree’s 2024 Innovation Challenge (Nov 2024) - Featured in a16z’s February 2025 fintech newsletter on voice AI - Integration with ICE’s MSP servicing system (April 2026) - Most deployed AI voice agents in the mortgage industry (per website) - Active job postings: 8 positions, with 300% yearly increase in listings ## Competitive Advantages - **Purpose-built for compliance**: Pre-trained on key lending regulations (FDCPA, TILA, UDAAP, RESPA, TCPA) with a proprietary Compliance Engine. - **Enterprise-grade integrations**: Direct connectivity with ICE’s MSP (the dominant mortgage servicing system) and other core systems. - **Fast time to value**: Go-live in days with out-of-the-box agents that map to existing workflows. - **Transparent AI**: All responses are fully explainable with built-in reasoning, enabling audit-ready operations. - **Battle-tested track record**: Claims to have the most deployed AI voice agents in the mortgage industry, with proven metrics (70% lower cost per call, 40% lower handle time, 90%+ CSAT). ## Strategic Focus - Deepening integrations with core mortgage systems (e.g., MSP) to reduce friction for large lenders. - Scaling the AI agent workforce across the full lending lifecycle (origination, servicing, collections, compliance). - Expanding from voice to true omnichannel (SMS, email, chat) and adding more pre-built agent types. - Growing the enterprise customer base among FDIC-insured banks and IMBs. ## Why Work Here - **Culture**: Early-stage YC startup with a small, high-agency team (10 people). Founders have strong product/engineering backgrounds (Redfin, Verkada). Emphasis on building mission-critical AI for a regulated industry. - **Work policy**: Based in San Francisco (185 Channel Street). Likely in-office given the early stage and need for close collaboration. - **Notable perks/engineering culture**: Opportunity to work on proprietary inference technology, compliance engine, and real-time AI systems. Roles span applied AI, forward deployment, and product management. High ownership and impact from day one. - **Growth trajectory**: Rapid headcount growth (66% YoY), multiple open roles, and strong market traction suggest significant career growth potential. ## Sources 1. [kastle.ai](https://www.kastle.ai/) 2. [ycombinator.com](https://www.ycombinator.com/companies/kastle) 3. [linkedin.com](https://www.linkedin.com/company/kastleai) 4. [cbinsights.com](https://www.cbinsights.com/company/kastle) 5. [ycombinator.com/jobs](https://www.ycombinator.com/companies/kastle/jobs) ## Other roles at Kastle - [Head of Sales](https://feeny.ai/job/head-of-sales-kastle-san-francisco-d0xkyqh7a74w) — San Francisco, CA - [Software Engineer - Intern](https://feeny.ai/job/software-engineer-intern-kastle-san-francisco-25ekajcm3kk7) — San Francisco, CA - [Senior Product Manager](https://feeny.ai/job/senior-product-manager-kastle-san-francisco-w8f083jn8y91) — San Francisco, CA - [AI Deployments Lead](https://feeny.ai/job/ai-deployments-lead-kastle-san-francisco-dk0d9gy0kw3b) — San Francisco, CA - [Mortgage Originations Process Specialist](https://feeny.ai/job/mortgage-originations-process-specialist-kastle-san-francisco-cpcar50m80p4) — San Francisco, CA - [Founder's Office](https://feeny.ai/job/founder-s-office-kastle-san-francisco-cfysxyhxtfnp) — San Francisco, CA - [AI Trainer (Part-time)](https://feeny.ai/job/ai-trainer-part-time-kastle-remote-gawt2gvp2g56) - [Agent Product Manager](https://feeny.ai/job/agent-product-manager-kastle-san-francisco-2mq46j3a94ka) — San Francisco, CA - [Staff AI Engineer](https://feeny.ai/job/staff-ai-engineer-kastle-san-francisco-pd6as3jgcxct) — San Francisco, CA - [Enterprise Account Executive](https://feeny.ai/job/enterprise-account-executive-kastle-san-francisco-h9mz7tqdf5ww) — San Francisco, CA