← All roles

Software Engineer - Intern

Kastle· Engineering
Apply on company site
Hybrid (San Francisco)Full-timePosted 1mo ago

About the role

Intern Software Engineer role at Kastle, building AI-powered solutions for consumer lending and deploying production-grade AI Agents for large banks and mortgage servicers.

Responsibilities

  • Ship agent capabilities that run in production at national banks and servicers
  • Contribute to evals and QA harnesses that catch failure modes and makes reliable AI scale in production
  • Work with the latest voice and language models — latency, interruption handling, grounding, tool use — and integrate them into enterprise environments
  • Sit in on real customer calls and learn directly from executives and how AI gets deployed in the real world
  • Contribute to technical documentation and internal tooling.

Qualifications

  • Currently pursuing or recently completed a Bachelor's / Master's / Bootcamp degree in Computer Science, Software Engineering, or a related field.
  • Strong programming fundamentals in at least one language such as Python, Java, Go, JavaScript, TypeScript, or C++.
  • Experience building personal projects, coursework, hackathon projects, or previous internships.
  • Familiarity with web development, APIs, databases, or cloud platforms is a plus.
  • Strong problem-solving skills and attention to detail.
  • Comfortable working in a collaborative, fast-paced environment.
  • Eager to learn, ask questions, and continuously improve.

Skills

Required:Python
Nice to have:JavaGoJavaScript / TypeScriptWeb development / APIs / databases / cloud

Benefits

  • Hands-on experience building software used by real customers.
  • Mentorship from experienced engineers.
  • Exposure to the full software development lifecycle—from planning to production.
  • Opportunities to own meaningful projects and present your work.
  • A collaborative team environment focused on learning, growth, and impact.
Last updated Oct 21, 2026. Interested? Apply on the company site.
Kastle logo

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

More open roles at Kastle