Engineering Internship

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Ara (YC P26)

Reason Machines builds Reason Agent, the autonomous software engineer.

2-10 employeesFounded 2026San Francisco, CaliforniaTechnology, Information and Internet
Actively hiringPaidTechnology, Information and Internet
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Best applied by Jan 1

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About the role#

Ara builds systems to make agent-assisted engineering reliable, from the first prompt to a verified pull request. As an intern, you will own product, runtime, and production systems. You will turn early ideas into dependable software with high autonomy. You will work across the product surface and the infrastructure behind long-running autonomous agent work.

What you'll do#

  • Build clear, dependable agent-assisted product experiences.
  • Design and run the systems behind long-running agent work.
  • Work directly with users to turn rough workflows into finished products.
  • Raise the bar for quality, testing, verification, and operations.

What you'll need#

  • Experience shipping substantial product or platform systems.
  • Ability to move comfortably between product, frontend, and backend.
  • A focus on building dependable products rather than just demos.
  • Clear communication skills and an interest in navigating hard trade-offs.
  • Enrollment in Computer Science, Computer Engineering, or a related field.
  • Proficiency in tools such as PostgreSQL, React, Rust, TypeScript, Distributed Systems, LLMs, and AI Agents.

Location & details#

  • Location: San Francisco, California.
  • Modality: Full-time, on-site.
  • Compensation: This is a paid internship.
  • Note: Candidates must be US citizens or hold a valid visa. Sponsorship is not provided.

About Ara (YC P26)

Reason Machines is a technology company based in San Francisco. Founded in 2026, the company builds an autonomous software engineer called Reason Agent. This tool connects to GitHub to reproduce bugs, write code, and ship pull requests for engineering teams. The organization operates with a small team of 2 to 10 employees.

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How to get in at Ara (YC P26)

Applying early to Reason Machines gives you a distinct advantage because recruiters review applications before the pile grows. Intern Insider sends an instant alert the moment a role matching your target is published anywhere, so you can be among the first to submit your materials. This ensures your application is seen while the team is still actively filling the position. You can also improve your response rates by reaching out to the recruiters behind the company's roles directly. Intern Insider surfaces these contacts so you can ask informed questions about the role or request a referral. Connecting with the right person often provides more clarity than a standard application queue.

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