# Software Engineer - Intern

**Company:** [Kastle](https://hotfix.jobs/companies/kastle)
**Location:** San Francisco, CA
**Role:** Fullstack Engineering
**Experience:** 0+ years
**Skills:** Python, Java, Go, JavaScript, TypeScript, C++, web development, APIs, Databases, cloud platforms, voice models, language models, qa harnesses, technical documentation
**Posted:** 2026-08-07

> Build and ship production software and AI agents for banking and lending customers, contributing to agent capabilities, evaluation systems, integrations, and internal tools. The internship requires programming fundamentals and project experience, with exposure to the full software development lifecycle.

## Job Description

## Responsibilities
- Ship agent capabilities that run in production at national banks and servicers.
- Contribute to evaluations and QA harnesses that identify failure modes and improve reliable AI deployment at scale.
- Work with voice and language models, including latency, interruption handling, grounding, and tool use, and integrate them into enterprise environments.
- Participate in real customer calls to learn how AI is deployed in financial-services environments.
- Contribute to technical documentation and internal tooling.

## Requirements
- Currently pursuing or recently completed a bachelor's, master's, or bootcamp program 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 completing previous internships.
- Strong problem-solving skills and attention to detail.
- Comfortable working in a collaborative, fast-paced environment.
- Eager to learn, ask questions, and continuously improve.

## Nice-to-Haves
- Familiarity with web development, APIs, databases, or cloud platforms.
- Experience building agents that operate in real-time settings.
- Interest in consumer lending, banking, or financial services.

## Benefits
- Hands-on experience building software used by real customers.
- Mentorship from experienced engineers.
- Exposure to the full software development lifecycle, from planning through production.
- Opportunities to own meaningful projects and present your work.
- Collaborative team environment focused on learning, growth, and impact.

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**Apply:** https://hotfix.jobs/jobs/9f7f8332-c289-4d47-9a76-80fc5484c4c6
**Canonical:** https://hotfix.jobs/jobs/9f7f8332-c289-4d47-9a76-80fc5484c4c6