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Founder Intern (now and Summer 2026)

Kastle· Engineering
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Hybrid (San Francisco)$8k/mo - $8.8k/moInternPosted 11mo ago

About the role

Internship role at Kastle, an AI employee for consumer lending, to start ASAP in San Francisco. Interns work directly with founders on building real products across multiple business areas with high autonomy in a fast-paced environment.

Responsibilities

  • 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.

Qualifications

  • Relentlessly resourceful
  • Learns fast, moves faster
  • Cares about quality
  • Very Technical
  • Can start next week
Last updated Oct 21, 2026. Interested? Apply on the company site.
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About Kastle

AI agents for mortgage servicing

Kastle is an AI voice agent for mortgage servicing. We help servicers collect payments, verify new borrowers, and qualify new loan inquiries over the phone. Rishi and Nitish met at UIUC where they graduated with degrees in systems engineering and computer science. Rishi was the founding Product Manager for Redfin’s Mortgage Marketplace at 22 and grew the business from $3M to $6M in revenue in 9 months. Nitish patented Verkada’s motion search system and was the youngest tech lead at the company at 23. While building Redfin's Mortgage Marketplace Rishi realized traditional lenders didn't have the infrastructure to service online inquiries and were losing customers. Nitish and Rishi are building Kastle to help traditional financial services companies better interface with their customers.

Company profileWebsite

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