Envision Employment Solutions is currently hiring a Senior Data Scientist for one of our partners, a global leader in IT Services and IT Consulting.Job Summary:We are seeking a highly experienced Senior Data Scientist to design, build, and deploy advanced machine learning and NLP solutions, including large language model applications. The ideal candidate has strong production experience, deep expertise in transformer-based architectures, and a proven ability to lead technical initiatives from research to deployment.Responsibilities:Machine Learning & NLP DevelopmentDesign and develop end-to-end machine learning models, with a strong focus on NLP applicationsFine-tune and deploy large language models such as GPT, BERT, and LLaMA for specific use casesBuild, train, and evaluate deep learning models using TensorFlow, PyTorch, or KerasImplement Retrieval-Augmented Generation (RAG) and embedding-based semantic search solutionsDevelop and optimize transformer-based models for summarization, Q&A, and document intelligence tasksEvaluate and optimize prompt engineering strategies and context efficiencyData Engineering & PipelinesDevelop data pipelines using tools such as Airflow, Spark, or DataikuPerform data wrangling and preprocessing using pandas and NumPyDesign and manage feature storesIntegrate and manage vector databases such as Pinecone, FAISS, or ChromaModel Deployment & ProductionBuild and maintain RESTful APIs for serving ML models in productionDeploy scalable AI services and manage CI/CD pipelinesMonitor model performance, drift detection, and lifecycle managementConduct A/B testing, ensemble blending, and apply explainability techniques such as SHAP and LIMEStatistical & Analytical ExpertiseApply advanced statistics, probability theory, and experimental designConduct hypothesis testing and data-driven analysis to support business decisionsCollaboration & IntegrationWork closely with product and engineering teams to embed AI solutions into production systemsCollaborate with cross-functional stakeholders to deliver scalable AI capabilities