Kastle Software Engineer Intern building production software and AI Agents deployed at major banks. Collaborate with experienced engineers to design, build, and ship software used by millions monthly.
Responsibilities
We're looking for a Software Engineer Intern who is excited to build products that are used by millions of users every month. As an intern, you won't spend your summer fixing minor bugs or working on isolated projects—you'll work alongside experienced engineers to design, build, and ship production software and AI Agents that is deployed at some of the world’s largest banks.
You'll join a small, fast-moving team where you'll have real ownership, receive frequent feedback, and learn how software is built from idea to deployment.
If you're curious, enjoy solving difficult problems, and want to grow as an engineer by building meaningful products, we'd love to meet you.
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.
Qualification
Experience building personal projectsFamiliarity with web developmentComfortable working in a collaborativeEager to learnInterest in consumer lendingWhat You'll GainMentorship from experienced engineers
Required
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.
Preferred
Experience building agents that operate in realtime settings
Interest in consumer lending, banking, or financial services
What You'll Gain
A rare opportunity to contribute to a company that will redefine an entire industry
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.
