Founding AI Engineer

Job Summary

Javier Sanchez is seeking a Founding AI Engineer to join Rebolt, a company building the platform that enables companies to create internal applications in minutes using AI.

About the Role

This is a hands-on role for someone who thrives in ambiguity, understands both the math and the machine, and wants to build core technology, not just use it. You’ll join an early team where your ideas will directly shape the product and architecture.

Responsibilities

• Ship production-ready multi-agent systems and build tools for debugging, deploying, and operating scalable AI workflows.
• Lead and establish research culture by staying current with AI research and prototyping ideas that push our product forward.
• Implement your findings to quickly translate research insights into production systems.
• Work closely with customers to iterate and optimize our product.

Requirements

• Have 2+ years of SWE/AI/ML engineering experience with deep understanding of LLM internals, agent architectures, and evaluation frameworks.
• Proven rapid-prototyping skills. You know how quickly turn research insights into a functioning prototype and then iterate over it to turn it into a production-ready system.
• Hands-on full-stack development experience using TypeScript, React, and Node.js.
• Strong bias toward action, learning by doing and iterating effectively through complexity.
• Track record of impact via publications, open-source contributions, or significant real-world projects.
• Able to distill research insights, identify underlying problems, and design robust solutions.
• Comfort thriving in ambiguity, shaping core technology and architecture in a fast-paced startup environment.

Qualifications

• US citizen/visa only.

Benefits

• Competitive compensation range: $60K - $180K.
• Equity opportunity.
• Flexible remote work options available.
• Modern tech stack and modern working environment.

Pay

$60K - $180K

Schedule

Full-time

Company Information

Founded by Javier Sanchez, Rebolt is based in San Francisco, CA, US with remote offices in Madrid, MD, ES; Madrid, Community of Madrid, ES; Barcelona, CT, ES; Barcelona, Catalonia, ES; and London, England, GB.

Founders

Javier Sanchez

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