Backend Engineer - Remote

Backend Engineer – Python / FastAPI / LLM Pipelines | 100% Remote

Puede obtener más detalles sobre la naturaleza de esta vacante y lo que se espera de los solicitantes leyendo la información a continuación.

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 .

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 . - Experience with SQLAlchemy and PostgreSQL . - Hands-on experience developing LLM applications using LangGraph and/or LangChain . - Experience integrating OpenAI or Azure OpenAI APIs . - Knowledge of RAG, embeddings, vector search and structured LLM outputs . - Experience implementing techniques to reduce hallucinations and improve LLM output quality. - Experience processing structured or semi-structured datasets. - Knowledge of Docker and AWS cloud services . - Experience with automated testing using pytest . - Experience with XML processing is highly valued. - Experience with AWS Aurora, ECS/Fargate or RDS Data API is a plus. - Good professional English communication skills. xqbhyrx

Technology Stack

Python · FastAPI · LangGraph · LangChain · Azure OpenAI · RAG · FAISS · Pydantic · SQLAlchemy · PostgreSQL · AWS Aurora · Docker · ECS/Fargate · pandas · XML · pytest

If you enjoy working at the intersection of backend engineering, generative AI and cloud-based data processing , we would love to hear from you. Hay opciones de teletrabajo/trabajo desde casa disponibles para este puesto.