AI Engineer, Agent Systems

This is a full-time, on-site role in San Francisco, CA for mid to senior candidates.

About This Role

Zof AI is seeking an AI Engineer to build product features on top of frontier model APIs. This role owns the model-facing layer of our products: retrieval and RAG pipelines, agent planning and orchestration, multi-agent frameworks, and the context engineering that makes AI systems reliable in production. If you have worked as a GenAI Engineer, LLM Engineer, RAG Engineer, or Algorithm Engineer, this is that discipline at Zof AI. The ideal candidate has shipped LLM-powered features to real users and treats quality, cost, and latency as engineering constraints, not afterthoughts.

Responsibilities

• Design and build product features on top of frontier model APIs.
• Build and tune retrieval and RAG pipelines end to end.
• Design agent planning, tool use, and multi-agent orchestration.
• Own prompt and context engineering as a disciplined, tested practice.
• Wire evals into the development loop so quality is measured, not assumed.
• Optimize the cost, quality, and latency of AI features in production.
• Collaborate with product and engineering to ship reliably and fast.
• Own model-layer systems from design through production.

Requirements

• Experience shipping LLM-powered features to production.
• Strong software engineering foundation.
• Working knowledge of retrieval, RAG, and agent patterns.
• Fluency with the modern model API and tooling ecosystem.
• Judgment about quality, cost, and latency trade-offs.
• Clear written and verbal communication.
• Comfort operating in a fast-moving environment.
• Evidence of building high-quality technical work.

Nice to have

• Experience with multi-agent frameworks or agent orchestration systems.
• Experience building or using eval harnesses.
• Experience with TypeScript, Python, Node.js, Postgres, or similar technologies.
• Experience with fine-tuning or model adaptation.

Benefits

• MacBook Pro
• Premium AI development tools (Cursor Ultra, Claude Code Ultra, OpenAI Codex Max or equivalent advanced AI tooling)
• Access to a high-performance AI product environment
• Close collaboration with leadership, engineering, and customers
• Opportunity to work in the San Francisco AI ecosystem
• Wellness and productivity support where applicable
• Competitive startup environment with high ownership and direct product impact

Pay

Competitive salary plus meaningful equity.