Nicolás Japas

Senior AI / LLM engineering or senior backend & cloud roles on AWS: RAG and agent systems, serverless architectures, Python/FastAPI and TypeScript/React. Fully remote with full location independence (B2B contract or employment). Senior AI Engineer and full-stack developer with a backend and cloud focus. I build production LLM systems end-to-end: retrieval (hybrid search, chunking, re-ranking, metadata filtering), agent orchestration with LangGraph, and the FastAPI/React layers that expose them to users. Currently delivering the retrieval, ingestion, agent and application layers of a live conversational AI product for an enterprise client on AWS (Bedrock, OpenSearch Serverless, Lambda). Previously built event-driven serverless infrastructure (Lambda, EventBridge, API Gateway, DynamoDB, CDK) for a B2B SaaS platform serving about 30 companies across Europe, and productionized ML forecasting models on SageMaker. I also fine-tune small open-weight models (LoRA) for on-device use and run Japas Audio, a commercial audio software label. AWS Solutions Architect Associate, Terraform Associate and Neo4j certified. Based in Lisbon, German and Argentine citizen (no visa required in the EU). Languages: Spanish (native), English (C2), German (B2), Portuguese (A2).