Senior Data Scientist / Machine Learning Engineer, NLP - 1635

City: Las Vegas, NV / Calabasas, CA Onsite/ Hybrid/ Remote: Onsite 4 days a week Duration: 6 months **Work Authorization:** GC, USC, All valid EADs except H1B, OPT, CPT **Must Have:** - 4–6+ years of data science or machine learning experience - NLP classification for customer messages or call transcripts - Intent, topic, sentiment, and multi-label classification - Confidence scoring and model evaluation - Text cleaning, deduplication, speaker handling, and PII-safe processing - Trend and anomaly detection - Python, PySpark, SQL, and pandas - Labeled dataset design and annotation workflows - Precision, recall, confusion matrix, and drift monitoring **Responsibilities:** - Build and deploy NLP classification models for customer communications. - Develop intent, topic, sentiment, and multi-label taxonomies. - Clean and prepare transcript and message data for modeling. - Handle short-text cases, duplicate records, system messages, and speaker identification. - Build trend and anomaly detection methods using baselines, seasonality, and channel mix. - Design maintainable Python and PySpark data pipelines. - Define sampling strategies and annotation guidelines for labeled datasets. - Support reviewer adjudication and dataset quality validation. - Track model precision, recall, confusion patterns, confidence scores, and drift. - Implement secure processing for customer communications containing sensitive data. **Qualifications:** - 4–6+ years of relevant machine learning, NLP, or data science experience. - Proven experience deploying NLP models into production. - Strong experience with classification systems and text analytics. - Advanced Python development and testing skills. - Hands-on experience with PySpark, SQL, pandas, and scalable data pipelines. - Experience creating and validating labeled datasets. - Strong understanding of model evaluation, monitoring, and false-alert reduction. - Experience working with governed or PII-bearing data. **Nice to Have:** - Databricks - Unity Catalog - Databricks Workflows - MLflow - Model and data versioning - Retrieval and embedding models - LLM-assisted classification with evaluation and guardrails - Contact-center or customer-support analytics - Property-management or real-estate data experience