Senior AI Engineer - LLM and Agent Systems at Source Meridian

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