Full-Time

AI Engineer

Posted on 9/4/2025

Fractional AI

Fractional AI

51-200 employees

Custom generative AI development for enterprises

No salary listed

San Francisco, CA, USA + 1 more

More locations: New York, NY, USA

Hybrid

Hybrid schedule: 4 days in-office, Fridays remote.

Category
AI & Machine Learning (2)
,
Requirements
  • 4+ years of experience in software engineering with exceptional code quality and production-ready code across multiple programming languages
  • Proficiency and track record in building applications with Large Language Models, including experience with frameworks such as LangChain and LlamaIndex
  • Experience building scalable applications with large language models
  • Comfortable self-teaching, asking why, and experimenting to solve new problems
  • Start-up mindset: self-starter, willing to take on varied responsibilities and shape strategy and culture
  • Comfortable talking with customers and ensuring solutions meet customer needs through effective communication
  • Strong teamwork and collaboration, willingness to help others and maintain integrity in work
  • Ability to work in customer environments and adapt to different stacks and environments
  • Experience collaborating with customers to gather requirements and translate them into technical implementations
  • Excellent problem-solving skills and ability to tackle hard, novel problems
Responsibilities
  • Design and develop custom AI solutions tailored to customers with seamless integration and scalability
  • Partner with a high-caliber team across the full project lifecycle, including requirements gathering, prototyping, system design, coding, testing, deployment, and support
  • Actively shape Fractional AI's engineering and broader company culture, including learning approaches, hiring, and celebrating achievements
Desired Qualifications
  • Experience with LangChain and Langsmith and other tools and frameworks such as OpenPipe, Pinecone, ChromaDB
  • Familiarity with building LLM-powered applications across multiple industries and use cases
  • Experience working in customer-facing engineering roles or close collaboration with customer teams
  • Senior engineer or leadership experience within high-impact projects
  • Comfort working in San Francisco, New York, or Dubai offices or remote/hybrid arrangements that include in-person collaboration

Fractional AI is a San Francisco-based AI development firm that builds custom generative AI applications for large enterprises. It combines consulting with hands-on software development to automate complex and repetitive business workflows. Its engineering-led, bespoke approach delivers 100% tailored solutions for each client, rather than generic products. Notable projects include an AI moderation system for Change.org, an AI-powered connector builder for Airbyte, and a RAG app for Superintelligent, with a goal to bridge AI theory and production by delivering production-ready AI software that accelerates enterprise automation.

Company Size

51-200

Company Stage

N/A

Total Funding

N/A

Headquarters

San Francisco, California

Founded

2024

Simplify Jobs

Simplify's Take

What believers are saying

  • OpenAI partnership grants cutting-edge models for enterprise solutions.
  • Fabius acquisition targets private equity workflow automation.
  • Healthcare division led by Bryant, Bilbro serves Claritev, Iodine.

What critics are saying

  • OpenAI Foundry undercuts bespoke services with self-serve agents.
  • Anthropic Claude erodes healthcare demand via HIPAA agents.
  • Google Vertex slashes custom build needs by 50% immediately.

What makes Fractional AI unique

  • Elite ex-LiveRamp team builds 100% production AI for enterprises.
  • Custom dev shop solves single-client problems unlike broad products.
  • Acquired YC's Fabius for sales workflow AI expertise.

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Benefits

401(k) Retirement Plan

Unlimited Paid Time Off

Health Insurance

Dental Insurance

Vision Insurance

Health Savings Account/Flexible Spending Account

Commuter Benefits

Life Insurance

Team Events and Activities

Gym Membership

Wellness Program

Mental Health Support

Remote Work Options

Hybrid Work Options

Paid Vacation

Paid Sick Leave

Paid Holidays

Stock Options

Company Equity

401(k) Company Match

Phone/Internet Stipend

Home Office Stipend

Professional Development Budget

Conference Attendance Budget

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

0%

2 year growth

0%
PR Newswire
Feb 26th, 2026
Fractional AI acquires Y Combinator's Fabius to scale applied AI systems

Fractional AI, a leader in applied AI, has acquired Fabius, a Y Combinator startup specialising in automating sales and operational workflows using AI. The acquisition strengthens Fractional's position as the fastest growing AI-native service provider. Founded in 2020 and part of YC's Winter 2023 cohort, Fabius brings experience in applying generative and embedding-based models to real-world workflows. The combined entity will expand the scope and scale of AI systems delivered to clients, particularly in private equity-backed portfolio companies. Fractional AI, an OpenAI partner, builds custom generative AI solutions that integrate into business workflows and support critical decisions. The acquisition comes as enterprise demand for production AI systems accelerates.

PR Newswire
Jan 28th, 2026
Fractional AI launches healthcare division to build production-grade AI systems for enterprises

Fractional AI has launched Fractional AI Health, a dedicated division for healthcare and life sciences enterprises. The new unit builds production-grade AI systems aimed at driving operational efficiency, accelerating revenue growth and improving clinical outcomes. Headquartered in North Carolina's Research Triangle, the division pairs engineering expertise from over 50 production AI deployments with healthcare-specific knowledge. Led by Kyle Bryant and Dr Rebecca Bilbro, Fractional AI Health focuses on automating workflows, building AI-powered features and upskilling internal teams whilst maintaining rigorous standards for patient safety, data privacy and regulatory compliance. The company has already worked with clients including Claritev, Iodine Software, Definitive Healthcare, Beghou Consulting and Atropos Health. Fractional AI is an OpenAI partner founded by Chris Taylor and Travis May.

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