About the role#
Kastle is looking for a Founder Intern to join the team in San Francisco. This is a full-time, paid position for someone who can start next week. You will work directly with the founders to build our operating system for consumer lending.
What you'll do#
- Ship real products.
- Take on tasks across customer support, growth, operations, engineering, and sales.
- Work directly with the founders to unblock them.
- Handle the hardest, most boring, and least glamorous tasks.
- Operate with autonomy in an unstructured environment.
- Turn vague prompts into working systems.
What you'll need#
- You are relentlessly resourceful.
- You learn fast and move faster.
- You care about the quality of your output.
- You are very technical.
- You can start next week.
Location & details#
- Location: San Francisco, California.
- Modality: On-site.
- Commitment: Full-time.
- Compensation: $100,000.
- Sponsorship: Not available (US citizens or existing visa holders only).
About Kastle (YC S24)
Kastle is an applied AI lab focused on the financial services sector. Founded in 2024, the company develops AI agent platforms for consumer lending. Its primary product, KastleOS, automates tasks throughout the loan lifecycle. The firm is based in San Francisco and maintains a team of 17 employees.
How to get in at Kastle (YC S24)
Securing a role at Kastle requires speed, as early applicants often gain visibility before the candidate pool expands. Intern Insider sends an instant alert the moment a role matching your target is published anywhere, helping you apply among the first. This timing advantage helps ensure your application is reviewed before the pile grows. You can also improve your odds by reaching out to the right people. Intern Insider surfaces the recruiters behind the company's roles so you can contact them directly to ask about the position or a referral, which materially improves response rates.



