Backend Engineer – Python / FastAPI / LLM Pipelines | 100% Remote We are looking for an experienced Backend Engineer to join an international technology project focused on building an intelligent platform that combines Python backend development, APIs, LLM-based agentic workflows and large-scale data processing .

Asegúrese de presentar su candidatura con toda la información solicitada, tal como se expone en la descripción del puesto a continuación.

Location: Spain Work model: 100% Remote Environment: International team English: Good professional working proficiency required What will you be working on? You will help build and operate the Python backend behind an AI-powered platform used to process, compare, update and evaluate complex technical content.

Your responsibilities will include: Designing and maintaining REST APIs using Python and FastAPI .

Developing typed API schemas with Pydantic and strong typing practices.

Building asynchronous backend components and secure endpoints.

Developing agentic AI pipelines using LangGraph and LangChain .





Implementing workflows for content discovery, matching, editing, validation and evaluation.

Integrating Azure OpenAI models using structured outputs and function/tool calling.

Developing RAG-based solutions using embeddings and FAISS .

Implementing grounding, provenance and hallucination-control mechanisms.

Processing engineering datasets and large structured XML documents.

Performing data transformations using pandas and openpyxl .

Developing database integrations using SQLAlchemy 2.X, PostgreSQL and AWS Aurora .

Containerizing and deploying backend workloads using Docker and AWS ECS/Fargate .

Working with AWS services such as ECR, Secrets Manager, RDS and SSO .

Maintaining automated testing practices using pytest .

What are we looking for? Strong professional experience with Python .

Solid experience developing APIs with FastAPI .

Experience with Pydantic, async Python and typed backend development .

Ex

📌 Backend Engineer (Gerona)
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📍 Gerona