Co-Founding Engineers: Lead AI Projects Together

SupportFinity™

San Francisco (CA)

Hybrid

USD 180,000 - 260,000

Full time

14 days+
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Benefits offered by this job

Competitive compensation
401k with matching
Unlimited PTO
Medical, dental, vision coverage
Commuter benefits
Team events

Job summary

Fractional AI seeks an experienced software engineer to lead the design and delivery of custom AI solutions for clients. You will collaborate across engineering, product, and customers to innovate and ship production-ready AI applications.

You’ll operate in a senior role within a fast-paced startup environment in San Francisco or NYC, shaping technical direction, mentoring peers, and driving impact while balancing speed and quality.

Qualifications

  • 7+ years of engineering experience building production AI/ML systems.
  • Strong proficiency across multiple programming languages.
  • Demonstrated interest in AI and hands-on with examples (LangChain, LLM projects).
  • Startup mindset: self-starter, can operate with minimal guidance and influence culture.
  • Excellent communication with users and cross-functional teams.

Responsibilities

  • Design and develop custom AI solutions for client needs with scalable integration.
  • Partner with a high-caliber team through full project lifecycle: requirements, prototyping, design, coding, testing, deployment, support.
  • Shape engineering culture and practices, collaborating with leadership to grow Fractional AI.

Skills

Python
AI/ML
Team leadership
User communication
Multi-language coding

Tools

LangChain
Langsmith
OpenPipe
Pinecone
ChromaDB

Job description

Fractional AI seeks an experienced software engineer to lead the design and delivery of custom AI solutions for clients. You will collaborate across engineering, product, and customers to innovate and ship production-ready AI applications.

You’ll operate in a senior role within a fast-paced startup environment in San Francisco or NYC, shaping technical direction, mentoring peers, and driving impact while balancing speed and quality.

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