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This listing was closed on Sep 18, 2026.
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Summary by AIEngineer.careers
AI Engineer is a AI Engineer role (full-time). with culture as the team scales. in SAN FRANCISCO, US. Imported listing (source: builtinsf.com). Apply on the employer's site (builtinsf.com).
Imported listing (source: builtinsf.com) · Apply on builtinsf.com
SAN FRANCISCO · US
—
Full-time
MID
The sections below reproduce the third-party job description for reference. AIEngineer.careers does not write or control this text.
Imported job description
Sourced from builtinsf.com
Fractional AI is a startup partnering with companies like Zapier and Airbyte to build and ship custom AI solutions. As an AI Engineer, you'll design and deploy LLM-powered applications across a variety of industries and work closely with customers throughout the full project lifecycle. You'll also help shape engineering and company culture as the team scales.
Responsibilities
- Design and develop custom AI solutions tailored to customer needs, ensuring seamless integration and scalability.
- Partner with a high-caliber team across the full project lifecycle: requirements gathering, prototyping, system design, coding, testing, deployment, and support.
- Actively shape engineering and broader company culture, including how the team learns, hires, and celebrates.
Requirements
- 4+ years of experience writing exceptional, production-ready code.
- Strong proficiency across multiple programming languages (Python is common).
- Track record building scalable applications with Large Language Models using frameworks such as LangChain, LlamaIndex, etc.
- Comfortable working directly with customers and navigating customer conversations.
- Start-up ready: able to jump in without instruction, embrace a 'no job too big, no job too small' mindset.
culture as the team scales
San Francisco · US · 77+ employees
Fractional AI is an applied AI services company that specializes in building bespoke, production-grade generative AI solutions for enterprises. The company helps businesses transition AI projects from conceptual proof-of-concepts into scalable, real-world production systems and was acquired to serve as the operational centerpiece of a new AI-native enterprise services firm backed by Anthropic, Blackstone, and Hellman & Friedman.
