Sai S.

Sai S.

United States of America
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About Me

Lead Al/ML Engineer with 12+ years of delivering impactful solutions in AI, ML, NLP, and GenAl, driving end- to-end machine learning initiatives across data engineering, model development, cloud deployment, and real-time production monitoring. Expert in ML pipeline design for classification, regression, clustering, forecasting, and anomaly detection using advanced algorithms (Logistic Regression, Random Forests, XGBoost, SVM, Bayesian Models, Ensemble Methods). Sandeep is skilled in advanced NLP (sentiment analysis, entity recognition, summarization, conversational Al) using transformers such as BERT, GPT-3/4, T5, RoBERTa, LLaMA, Hugging Face. Designs and delivers production-grade GenAl applications with LangChain, OpenAl, advanced RAG pipelines (chunking, retrieval optimization, knowledge graph integration), and vector databases (Pinecone, ChromaDB).

AI, ML & LLM

AWS Bedrock Airflow Async/Await AutoML BERT ChatGPT Claude Conversational AI FAISS GPT-4 LangChain Langgraph Langsmith LlamaIndex MLFlow MLlib NLP Pytorch RoBERTa TensorFlow Lite XGBoost

Backend

Database

DevOps

QA & Testing

Hypothesis Testing

Workflow

Confluence Git GitHub Actions JIRA

Other

Agile Amazon Redshift Anomaly Detection Ansible Apache Beam Apache Nifi Apache Pulsar Autoencoders Blob Storage C Cassandra CatBoost CircleCI Classification Clustering Computer Vision Core CrewAl DVC Data Encryption Databricks Delta Lake Dimensionality Reduction EDA Elasticsearch Ensemble Methods Expert Systems Feature Engineering Flume Gradio HBase HDFS HIPAA Hadoop Helm Hive Hugging Face IAM Jsonb Kafka Kafka Streams Keras Kinesis Kubeflow LLaMA LSTM Lambda LightGBM LoRa Logistic Regression Looker Matplotlib NLTK Nest.js Oozie OpenAL OpenCV Optimization Optuna PCA PEFT Pinecone Plotly Power BI Pycharm Pyspark RAG RStudio Random Forests Recommender Systems Redis Regression Reinforcement Learning Role-based Access Control (RBAC) SHAP SOC 2 SVM SageMaker Scala Scikit Learn Scrum Seaborn Snowflake Spark Spyder Sqoop Streaming Synapse T5 Tableau Tensorflow Teradata Time Series Analysis Transfer Learning Typescript VS Code spacy

Work history

USAA
Lead AI/ML Engineer
2024 - 2026 (2 years)
Remote
  • Designed Al-driven financial forecasting models using Auto-Sklearn and H2O.ai for market trend prediction and risk estimation, improving forecast accuracy by 15%.

  • Built fraud detection pipelines on AWS SageMaker and PySpark with Kinesis Data Streams; improved true positive rates by 12% and reduced manual case reviews by 20%.

  • Engineered advanced fraud risk features (velocity thresholds, geolocation mismatches, device fingerprinting), lowering false positive alerts by 18%.

Auto-Sklearn H2O.ai AWS SagemakerPysparkKinesis Data Streams ScalaRPythonGPT-4 BERT LangChain Langgraph Langsmith Langfuse Autogen Al RAG RedisPinecone PostgreSQLElasticsearch WhyLabs
Centene
Lead AI/ML Engineer
2021 - 2023 (2 years)
Remote
  • Developed machine learning models for programmatic ad bidding optimization using Python, TensorFlow 2.x, PyTorch 1.13, and XGBoost on AWS SageMaker, Kubernetes, with real-time scoring supported by Lambda and Kinesis.

  • Led full cloud migration of ML workflows from AWS SageMaker to GCP Vertex Al, unifying training, deployment, and monitoring pipelines, reducing bid cost variance by 15% and accelerating deployments.

  • Collaborated with infra and business teams to align Agentic Al workflows (planner-executor orchestration, tool calling, guardrails) with compliance, marketing, and fraud detection; integrated Jira, Confluence, and Git for traceable and auditable workflows.

Lowe's
AI/ML Engineer
2018 - 2021 (3 years)
Remote
  • Led end-to-end development of AI/ML solutions for personalized recommendations, targeted promotions, and supply chain optimization, driving measurable ROI in customer engagement and operational efficiency.

  • Architected and implemented high-throughput ingestion pipelines with AWS Glue, Spark, PySpark, and SQL-based preprocessing to process clickstream, POS, and inventory data, reducing pipeline latency by 25%.

  • Built and deployed containerized microservices (Django, Tornado, FastAPI with async/await, Docker) on AWS EKS, delivering low-latency APIs for recommendation engines and pricing intelligence.

JIRAConfluenceAgile AWS SagemakerGlue CodePipeline CloudWatchQuicksightTerraformDockerKubernetesPythonDjangoTornadoFastAPIPysparkSparkXGBoostCNN RNN BERT spacyNLTKRAG Langsmith SHAP LIME AWS IAM VPC Service Controls Google BigQuery GANS
Visa
Data Scientist
2016 - 2018 (2 years)
Remote
  • Partnered with fraud prevention and risk analytics teams to design ML models for real-time transaction scoring, reducing false positives and improving fraud detection accuracy.

  • Built and validated classification and anomaly detection models (Logistic Regression, Random Forests, XGBoost, K-means) for fraud detection and merchant risk scoring.

  • Developed deep learning NLP models (Keras, PyTorch) for text classification, entity extraction, and summarization, automating dispute resolution and compliance reviews.

SQL ServerTeradataAzure Blob StoragePandasNumpySparkRGgplot2 Azure SDK Blob Storage Key Vault Service Bus Power BI Azure DevOpsAzure ML Azure MonitorApplication Insights Agile KerasPytorchXGBoostNLPNLTKspacyTextBlob
Zensar
Data Scientist
2012 - 2014 (2 years)
Remote
  • Contributed to end-to-end analytics projects, from requirements through data ingestion, transformation, modeling, and visualization for enterprise clients.

  • Designed and maintained large-scale pipelines with Hadoop HDFS, Hive, Spark, supporting structured/unstructured datasets.

  • Performed behavioral clustering using K-means on customer datasets to uncover actionable insights and drive targeted marketing strategies.

Education

Education
Master's in computer science
Central Michigan University
2016 - Present (10 years)
Education
Bachelor's in computer science
CMR Technical Campus
2012 - Present (14 years)
Education
Google Cloud Professional Machine Learning Engineer
Google Cloud
Education
AWS Certified Solutions Architect - Professional
AWS