AI Integration Engineer (Remote, San Jose)

About the role

Blacksmith Agency is hiring an AI Integration Engineer to build its internal automation roadmap: production LLM and agent systems used daily by its team. This is a builder role, not research, and you will not train models. The position is full-time and must be your only job, and it is open to candidates in Latin America and South Africa.

Key responsibilities

• Build agents and workflows with tool use and function calling on Anthropic and OpenAI, using a framework or plain APIs.
• Create evals that show improvements and guardrails that prevent unsafe or incorrect model actions.
• Integrate WordPress, Figma, Google Workspace, Slack and internal systems, including MCP servers.
• Built internal tools that save measurable hours on delivery, sales operations and project management.

Required profile

• 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 experience with tool use, evals and failure handling, including validating model output, retries and human approval.
• REST APIs, webhooks and cloud deployment.
• Strong spoken English, since you will discuss technical decisions on live calls with a US team.
• Not a fit if you freelance or contract for other clients alongside this job, or if your LLM work is demos, tutorials or chat prompting, or focused on model training and research.

To apply, submit a short application and then complete a 6-minute Predictive Index assessment with the same email; qualified applicants take a recorded English interview about systems they have shipped.