LLM Engineer (Remote, Vereeniging)

Blacksmith Agency LLC; South Africa; Remote; ZAR 520,000 - 840,000; Full time

Job summary

Blacksmith Agency LLC is seeking an LLM Engineer to own and ship our internal automation roadmap. This builder role focuses on production systems on top of AI models, not model training.

You will work with engineering and delivery leadership to turn a documented roadmap into shipped automation workflows, using LangChain, LangGraph, and API integrations to reduce manual hours across the design and development process.

Qualifications

• 2+ years building production software with Python or Node.js.
• Hands-on experience with LangChain, LangGraph, CrewAI or similar agent frameworks.
• Proven API integration work with OpenAI or Anthropic (function calling, tool use, streaming).

Responsibilities

• Own and ship our internal automation roadmap with production systems.
• Build agent-based workflows using LangChain, LangGraph or equivalents.
• Integrate with OpenAI/Anthropic APIs and implement tool calls and streaming.
• Collaborate with engineering and delivery leadership to ship features.

Skills

Python

Node.js

LangChain

LangGraph

CrewAI

AutoGen

API integration

REST APIs

Webhooks

Cloud deployment

English (async)

Tools

OpenAI API

Anthropic API

WordPress

Figma

Google Workspace

CMS

Job description

About The Role

Blacksmith Agency is building an AI automation layer into every part of how we work. As LLM Engineer at Blacksmith, you own and ship our internal automation roadmap. This is a builder role, not a research role. You will not be training models, you will be building production systems on top of them.

You work directly with engineering and delivery leadership to take a documented roadmap of automation workflows and turn them into shipped, working systems. This role is for someone who has already built things with LLMs and can show it.

Blacksmith Agency

• Engineering
• Full time
• Remote (Latin America and South Africa)

What You Will Build

• Agentic workflows using LangChain, LangGraph or equivalent frameworks.
• Integrations with Anthropic and OpenAI APIs including tool use and function calling.
• Internal tools that reduce manual hours across our design and development production process.
• Automation pipelines connecting WordPress, Figma, Google Workspace and our internal CMS.
• MCP server integrations as part of our broader AI stack.

What You Bring

• 2+ years building production software with Python or Node.js.
• Hands-on experience with LangChain, LangGraph, CrewAI, AutoGen or similar agent frameworks.
• Proven API integration work with OpenAI or Anthropic (function calling, tool use, streaming).
• Strong understanding of REST APIs, webhooks and basic cloud deployment.
• English sufficient for async written work with a US-based team.