Backend AI Engineer

# Think Data Be Smart # About Us: We are a Portuguese-based consulting company with over 20 years of experience in Technology and Information Systems, delivering excellence across the Portuguese and international markets. We value collaboration, expertise, and innovation, fostering a culture where talent thrives. Join our team as a Backend AI Engineer (Hybrid – Porto)! What You’ll Do: - Design, develop, and maintain backend services using C# and .NET/.NET Core - Translate business requirements into scalable software and AI/ML solutions - Prepare datasets, engineer features, and select appropriate machine learning approaches - Build, train, fine-tune, evaluate, and deploy different types of ML models, including classification, regression, NLP, time-series, anomaly detection, computer vision, and deep learning - Develop production-ready ML pipelines using Python, PyTorch, TensorFlow, and scikit-learn - Deploy ML models through cloud endpoints, APIs, batch pipelines, and edge applications - Monitor model performance, data quality, and application behavior in production - Implement model versioning, experiment tracking, and retraining processes - Develop LLM-based solutions using GPT, Transformers, Hugging Face, RAG, and prompt engineering - Create proofs of concept and support the transition of AI solutions into production - Design cloud-based AI architectures using Azure, AWS, or Google Cloud - Work with Azure Machine Learning, Azure AI, AWS SageMaker, AWS Bedrock, Vertex AI, or equivalent services - Containerize applications and ML services using Docker and Kubernetes - Contribute to CI/CD pipelines, MLOps practices, and AI governance standards - Ensure security, privacy, and responsible AI principles are applied throughout development - Conduct code reviews, document technical decisions, and mentor other engineers - Collaborate with Product Owners and cross-functional teams to deliver AI-driven solutions - Support production incidents, maintain SLAs, and identify technical improvements. Qualifications: - Bachelor's or Master's degree in Computer Science, Engineering, Data Science, or a related field - 5+ years of professional software engineering experience - 5+ years of hands-on experience with C# and .NET/.NET Core - 3+ years of hands-on experience in Machine Learning, AI Engineering, or Data Science - Proven experience building, training, and deploying at least 2 different types of Machine Learning models beyond LLM and RAG applications - Strong Python skills for data processing, model development, and ML pipelines - Practical experience with PyTorch, TensorFlow, and/or scikit-learn - Experience with model evaluation, experiment tracking, versioning, and production monitoring - Experience deploying ML models using Azure, AWS, or Google Cloud - Knowledge of Azure ML, Azure AI, AWS SageMaker, AWS Bedrock, Vertex AI, or similar services - Experience with Docker, Kubernetes, and CI/CD pipelines - Strong understanding of MLOps practices and production model operations - Knowledge of NLP, LLMs, Transformers, Hugging Face, and prompt engineering - Experience with microservices, databases, and high-volume backend systems - Good understanding of API security, AI governance, and data privacy - Experience working in Agile/Scrum environments - Fluent English. At DataSmart, 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 LinkedIn for updates on career opportunities, company news, and industry insights! For further details, visit us at www.datasmart.pt #JoinOurTeam #DataSmart #ThinkDataBeSmart #AIEngineer #MachineLearning #.Net #C#