# Founding LLM Engineer

**Company:** [Spherecast](https://hotfix.jobs/companies/spherecast)
**Location:** New York, NY
**Role:** ML Engineering
**Skills:** LLMs, Anthropic, OpenAI, Deepseek, Openrouter, Gemini, Moonshot, Hugging Face, Prompt Engineering, Agent Systems, Evaluation Pipelines, Llm Observability, Structured Outputs, Self-Hosted Llms
**Posted:** 2026-08-18

> Build and productionize Agnes, an AI supply-chain manager, by developing LLM-powered agents, automations, evaluation pipelines, and observability systems. The role requires hands-on experience with modern LLM APIs, Hugging Face, prompting, system design, and production AI workflows.

## Job Description

## Responsibilities
- Build Agnes, an AI Supply Chain Manager, from prototype through production.
- Own AI systems end-to-end, including prompts, tested and evaluated pipelines, agents, and production outcomes.
- Design robust tools/functions, structured outputs, and multi-step agent flows for real-world edge cases.
- Build LLM-powered automations and agents that support production systems.
- Design and maintain evaluation pipelines for prompts and workflows.
- Implement observability and monitoring, including logging, traces, quality metrics, and feedback loops.
- Collaborate directly with the core team to model and optimize physical supply-chain flows.

## Requirements
- Hands-on experience with modern LLM APIs, including Anthropic, OpenAI, DeepSeek, OpenRouter, Gemini, or Moonshot, with shipped production features.
- Strong understanding of LLM selection, including model strengths, weaknesses, latency, cost tradeoffs, and use cases.
- Practical experience with the Hugging Face ecosystem in real projects.
- Track record of building production LLM-powered automations or agents.
- Experience designing and maintaining evaluation pipelines.
- Strong prompting and system-design skills.
- Experience with LLM observability and monitoring.

## Nice-to-haves
- Experience running self-hosted LLMs in production or serious prototypes.

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