Founder Intern (now and Summer 2026)

Posted One Month Ago
Be an Early Applicant
San Francisco, CA, USA
In-Office
Internship
Artificial Intelligence • Fintech • Software • Financial Services
The Role
Work directly with founders at an AI-driven fintech startup to ship products and support all functions (engineering, growth, operations, sales, customer support). Operate autonomously on vague prompts, build systems, tackle unglamorous tasks, and move quickly in a high-paced, in-person San Francisco environment.
Summary Generated by Built In
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!

Skills Required

  • In-person in San Francisco
  • Available to start immediately / can start next week
  • Very technical
  • Relentlessly resourceful
  • Learns fast and moves quickly
  • Cares about quality
  • Ability to operate with extreme autonomy in an unstructured, high-paced environment
  • Willingness to handle the hardest, most boring, least glamorous tasks
  • Can take vague prompts and turn them into working systems independently or by rallying others
  • Comfortable working directly with founders and cross-functional teams
Am I A Good Fit?
beta
Get Personalized Job Insights.
Our AI-powered fit analysis compares your resume with a job listing so you know if your skills & experience align.

The Company
768 Employees
Year Founded: 1972

What We Do

Kastle AI is an AI platform for consumer lending and servicing that provides an AI operating system to automate borrower interactions, ensure compliance, and reduce costs for mortgage lenders. Using AI voice agents, the platform integrates with existing contact centers and payment systems to modernize operations without disruption, managing high-volume phone calls from loan inquiry to payoff.

Similar Jobs

Optum Logo Optum

Referral Coordinator

Artificial Intelligence • Big Data • Healthtech • Information Technology • Machine Learning • Software • Analytics
In-Office
Irvine, CA, USA
160000 Employees
16-29 Hourly

Optum Logo Optum

Associate Patient Care Coordinator

Artificial Intelligence • Big Data • Healthtech • Information Technology • Machine Learning • Software • Analytics
In-Office
Huntington Beach, CA, USA
160000 Employees
16-29 Hourly

Optum Logo Optum

Project Manager

Artificial Intelligence • Big Data • Healthtech • Information Technology • Machine Learning • Software • Analytics
In-Office
Irvine, CA, USA
160000 Employees
92K-164K Annually

Optum Logo Optum

Staff Pharmacist Full Time

Artificial Intelligence • Big Data • Healthtech • Information Technology • Machine Learning • Software • Analytics
In-Office
Norwalk, CA, USA
160000 Employees
44-79 Hourly

Similar Companies Hiring

Onshore Thumbnail
Artificial Intelligence • Fintech • Software • Financial Services
New York, New York
60 Employees
Revel.io Thumbnail
Aerospace • Hardware • Robotics • Software
US
50 Employees
Blee Thumbnail
Artificial Intelligence • Marketing Tech • Software • Productivity
US
15 Employees

Sign up now Access later

Create Free Account

Please log in or sign up to report this job.

Create Free Account