Senior AI Engineer - LLM and Agent Systems

Source Meridian - Senior AI Engineer - LLM and Agent Systems Medellin, Colombia / Quito, Ecuador | Permanent contract | Published February 20, 2026

Key Responsibilities:

• Design agentic workflows using LangGraph and LangChain, including multi-step reasoning, tool usage, and human-in-the-loop patterns
• Integrate LLMs (OpenAI, Anthropic, Google Vertex AI, open-source models) into backend services
• Build RESTful APIs with FastAPI
• Manage vector databases (Milvus) for retrieval-augmented generation (RAG)
• Implement memory architectures (short-term and long-term)
• Manage MongoDB for conversation history and agent checkpoints
• Deploy services via Docker, Kubernetes, and CI/CD pipelines

Required Qualifications:

• 3+ years Python experience
• Proven expertise with LangChain and LangGraph (graph-based agent orchestration, state management, conditional edges, parallel execution)
• LLM fundamentals understanding
• Vector database and embedding model experience
• REST API design/consumption knowledge
• MongoDB proficiency
• Conversational AI memory architecture understanding
• Context engineering familiarity
• English B2 or higher
• Residency in Colombia or Ecuador required