HartleyCo
Overview
This is a role with HartleyCo’s client, an AI-first startup reimagining a $900B industry by replacing outdated, pre-internet systems with high-performance AI agents. They are seeking a hands-on AI Platform Engineer to design and build the backbone of their platform — infrastructure that enables one person to deliver the output of thousands. The team is fresh off an $8M seed round from top-tier investors.
Location:
San Francisco, CA |
Base pay
$150,000.00/yr - $225,000.00/yr |
Equity
0.10%-0.50% |
Visa Sponsorship
Available
Salary range is provided by HartleyCo. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.
Key responsibilities
Enhance the in-house AI Grid platform combining ETL pipelines with LLM orchestration
Build evaluation systems using human-annotated datasets for model fine-tuning (SFT/RL)
Develop ML models for reasoning engines, load balancing, and market-making systems
Implement MCP servers to connect agents with tools and persistent memory
Create voice AI systems for outbound, follow-up, and customer service use cases
Integrate payment providers and financial systems directly into the platform
Collaborate with forward deployed engineers to ensure business impact
You’ll be a great fit if you have
Strong background in distributed systems, AI agents, and modern data engineering
Proven experience in both TypeScript/Node.js and Python
Track record building production ML infrastructure, ETL/ELT workflows, and orchestration systems
Experience with MCP protocols, vector DBs, and retrieval-augmented generation
Familiarity with voice AI architecture, payment integrations, and real-time processing systems
A bias toward action — you ship fast, iterate, and improve continuously
Tech stack Tech stack:
TypeScript, Node.js, Python, Next.js, Databricks, Astronomer, Temporal.io, Pydantic-AI, Redis Streams, PostgreSQL, ClickHouse, Apache Airflow, vector DBs, Claude, GPT-4, and more.
This is a rare chance to be early in a well-funded, high-growth AI startup where your work directly shapes the company’s technical foundation. The role is based in San Francisco, with relocation assistance provided, and requires working in-office 5.5 days a week alongside an exceptional founding team.
If you’re an engineer who thrives on building AI systems that change industries, we’d like to hear from you.
Seniority level
Mid-Senior level
Employment type
Full-time
Job function
Information Technology
Industries
IT Services and IT Consulting
Referrals increase your chances of interviewing at HartleyCo. Get notified about new Platform Engineer jobs in San Francisco Bay Area.
#J-18808-Ljbffr
Location:
San Francisco, CA |
Base pay
$150,000.00/yr - $225,000.00/yr |
Equity
0.10%-0.50% |
Visa Sponsorship
Available
Salary range is provided by HartleyCo. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.
Key responsibilities
Enhance the in-house AI Grid platform combining ETL pipelines with LLM orchestration
Build evaluation systems using human-annotated datasets for model fine-tuning (SFT/RL)
Develop ML models for reasoning engines, load balancing, and market-making systems
Implement MCP servers to connect agents with tools and persistent memory
Create voice AI systems for outbound, follow-up, and customer service use cases
Integrate payment providers and financial systems directly into the platform
Collaborate with forward deployed engineers to ensure business impact
You’ll be a great fit if you have
Strong background in distributed systems, AI agents, and modern data engineering
Proven experience in both TypeScript/Node.js and Python
Track record building production ML infrastructure, ETL/ELT workflows, and orchestration systems
Experience with MCP protocols, vector DBs, and retrieval-augmented generation
Familiarity with voice AI architecture, payment integrations, and real-time processing systems
A bias toward action — you ship fast, iterate, and improve continuously
Tech stack Tech stack:
TypeScript, Node.js, Python, Next.js, Databricks, Astronomer, Temporal.io, Pydantic-AI, Redis Streams, PostgreSQL, ClickHouse, Apache Airflow, vector DBs, Claude, GPT-4, and more.
This is a rare chance to be early in a well-funded, high-growth AI startup where your work directly shapes the company’s technical foundation. The role is based in San Francisco, with relocation assistance provided, and requires working in-office 5.5 days a week alongside an exceptional founding team.
If you’re an engineer who thrives on building AI systems that change industries, we’d like to hear from you.
Seniority level
Mid-Senior level
Employment type
Full-time
Job function
Information Technology
Industries
IT Services and IT Consulting
Referrals increase your chances of interviewing at HartleyCo. Get notified about new Platform Engineer jobs in San Francisco Bay Area.
#J-18808-Ljbffr