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This is a role with HartleyCo’s client, an AI-first startup reimagining a $900B industry by replacing outdated, pre-internet systems with high-performance AI agents.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
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