Engineering Internship

Reason Machines; San Francisco (CA); Presencial; USD 180.000 - 240.000; Jornada completa

Descripción de la vacante

Reason Machines in San Francisco seeks a Software Engineer who will own product, runtime, and production systems, turning early ideas into dependable software with high autonomy. You’ll work across the product surface and the infrastructure behind long-running autonomous agent work, shaping how users interact with complex tooling.

You will collaborate directly with users, raise the bar for quality, testing, verification, and operations, and help craft a scalable platform that supports rapid

Formación

• You have shipped substantial product or platform systems.
• You move comfortably between product, frontend, and backend.
• You care about dependable products, not just demos.
• You communicate clearly and enjoy hard trade-offs.

Responsabilidades

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

Descripción del empleo

Reason makes agent-assisted engineering reliable, from first prompt to verified pull request.

About the role

Own product, runtime, and production systems. 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 and turn rough workflows into product.
• Raise the bar for quality, testing, verification, and operations.

You may be a fit if

• You have shipped substantial product or platform systems.
• You move comfortably between product, frontend, and backend.
• You care about dependable products, not just demos.
• You communicate clearly and enjoy hard trade-offs.

Why Reason

Coding is changing from a craft practiced one prompt at a time into an operating system for building. Reason turns an incoming signal, such as a GitHub issue, Jira or Linear ticket, Slack thread, alert, or prompt, into a verified, reviewed pull request. Every task gets an isolated workspace. Reason reproduces the problem, writes the fix, verifies it with tests and evidence, works through review feedback, and leaves behind memory for the next run.

We are a small YC F26 team in San Francisco. You will have high ownership, no layers between you and users, and the chance to shape the product, runtime, and engineering culture from the beginning. Exceptional craft, curiosity, and follow-through matter more than a perfect résumé.