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# Senior LLM Engineer (Remote, Mexico City)

- **Company:** Blacksmith Agency
- **Location:** Mexico, MO, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Cloud Computing, Python (Programming Language), Node.Js, OpenAI, Systems Integration, TypeScript, WordPress, Large Language Models, Slack, Figma, Gsuite, Restful APIs, Webhooks
- **Published:** November 13, 2026
- **Apply:** https://arc.dev/remote-jobs/j/redirect/pyvygent8r

## About the Role

* 2+ years building production software in Python or TypeScript / Node.js.
 * At least one LLM or agent system you built yourself that ran in production with real users.
 * Hands-on tool use, evals and failure handling: validating model output, retries, human approval.
 * REST APIs, webhooks and cloud deployment.
 * Strong spoken English. You will talk through technical decisions on live calls with a US team.

## Description

Blacksmith Agency is building AI into every part of how we work. As Senior LLM Engineer at Blacksmith, you own and ship our internal automation roadmap: production LLM and agent systems that real people on our team use every day. This is a builder role, not research. You will not train models.

We hire engineers who have already shipped an LLM system to production and can walk us through it in detail: what it did, how it was built, what broke and what they changed. This is a full-time seat and it has to be your only job.

What You Will Build

 * Agents and workflows with tool use and function calling on Anthropic and OpenAI, with a framework or plain APIs.
 * Evals that prove a change made things better, and guardrails that stop a model taking a wrong or unsafe action.
 * Integrations connecting WordPress, Figma, Google Workspace, Slack and our internal systems, including MCP servers.
 * Internal tools that take measurable hours off delivery, sales operations and project management.