Platform Engineer - AI Infra Specialist (In-Person SF)

SupportFinity™; San Francisco (CA); On-site; USD 180,000 - 260,000; Full time

Job summary

Poly is building a groundbreaking file storage platform with a multimodal AI. We are expanding from a small founding team to a larger group and seek a platform engineer (AI infra specialist) to help scale the cloud architecture and AI systems, enabling fast, reliable file storage and intelligent search capabilities.

You will work in-person in SoMa, San Francisco, shaping infrastructure, collaborating across disciplines, and driving platform excellence in a fast-paced startup environment.

Qualifications

• Core AI principles and fundamentals around training, inference, loss, gradient descent, embeddings, tokenization.
• Experience with modeling / inference tools such as PyTorch and CUDA.
• Ability to build data pipelines for loading and transforming data with high throughput.
• Familiarity with prompting, function calling, and agentic workflows in LLM-based development.
• Knowledge of Python is a must; enthusiasm for Rust is encouraged.

Responsibilities

• Shape cloud architecture to store files at breathtaking speed and scale.
• Improve our AI architecture to become the 'search engine for your life'.
• Bring Poly to life as a robust platform through hands-on platform engineering.

Skills

Core AI principles

PyTorch

CUDA

Data pipelines

LLM fundamentals

Python

Rust

Learning mindset

Collaboration across domains

On-site in SoMa SF

Job description

Poly is building a groundbreaking file storage platform with a multimodal AI. We are expanding from a small founding team to a larger group and seek a platform engineer (AI infra specialist) to help scale the cloud architecture and AI systems, enabling fast, reliable file storage and intelligent search capabilities.

You will work in-person in SoMa, San Francisco, shaping infrastructure, collaborating across disciplines, and driving platform excellence in a fast-paced startup environment.