Tel.: +351 214 171 161 - LisboaTel.: +351 253 120 734 - BragaFax: +351 214 177 610(Chamada para a rede fixa nacional) (Call to the national fixed network)About Us: Data Smart is a Portuguese company, positioning itself as a consulting company of excellence, with over 20 years of existence. We are specialized in Technologies and Information Systems services, for the Portuguese and International markets. We pride ourselves on fostering a culture of involvement, experience, and excellence.Join our team as aPython Engineer(Hybrid – Lisbon)!What You'll Do:Design, build, and maintain production-grade AI and LLM-powered services using Python and modern software engineering practices.Develop and expose APIs and services using Fast API, REST/g RPC, Web Sockets, and streaming-based architectures.Implement and operate LLM orchestration frameworks such as Lang Chain and/or Llama Index, integrating Open AI or Azure Open AI models.Design and optimize RAG (Retrieval-Augmented Generation) pipelines, including semantic and hybrid chunking, re-ranking strategies, vector databases, metadata management, and index versioning.Build agent-based systems, including toolkits, hallucination control mechanisms, evidence validation, and budget-aware execution loops.Implement evaluation, observability, and monitoring strategies for AI systems, including tracing, feedback loops, utility metrics, RAG evaluation (e.g. RAGAS), synthetic test sets, and light red-teaming.Develop scalable pipelines and workflows using tools such as Airflow or Prefect, supporting asynchronous and event-driven ntainerize and deploy services using Docker and Kubernetes, ensuring scalability, auto-scaling, and CI/CD best practices.Operate model-serving solutions (e.g. Fast API with v LLM or Triton, when applicable), managing streaming, caching of prompts and embeddings, rate limiting, backpressure, and cost ntinuously profile and optimize performance, focusing on throughput, latency, and memory efficiency.Produce clear, high-quality technical documentation, including docstrings, Open API specifications, and reproducible READMEs.Qualifications:3+ years of experience with Python and software engineering fundamentals, including design patterns, modularization, and packaging.Proven experience building LLM-based systems using Lang Chain, Llama Index, or similar frameworks.Solid understanding of RAG architectures, vector databases, and evaluation methodologies.Hands-on experience with API design, asynchronous processing, and real-time streaming.Experience managing configuration and secrets, using tools such as pydantic v2, environment-based configuration, and secret managers (Azure Key Vault, AWS Secrets Manager, or similar).Strong background in containerized deployments, Kubernetes, and CI/CD pipelines.Experience with observability, monitoring, and post-production operations for AI systems.Ability to clearly articulate technical trade-offs, identify risks, and propose pragmatic solutions.Strong communication skills and a critical, engineering-driven mindset.English proficiency at a professional level (B2).Living in Portugal and available to work in a hybrid model.At Data Smart, you will have the opportunity to integrate into a solid company and participate in projects of high recognition, nationally and internationally, with an appealing technological environment and career progression.Excellence in the way to the future!Connect with Us : Follow us on Linked In for updates on career opportunities, company news, and industry insights! For further details, visit us at Our Team #Data Smart #Think Data Be Smart #Python #Kubernetes #AIEngineer #LLM #Gen AI #RAG