Siva Ranganatha Reddy

About Siva Ranganatha Reddy

Actively looking for C2c/ Full time roles. Experienced Data Scientist (Machine…

Experience

1. Data Scientist

   Amazon

   Mar 2025 — Present · US

   Project: Responsible Alexa DevelopmentOur project focused on enhancing Alexa\'s ability to handle sensitive queries responsibly. The goal was to classify Alexa\'s responses to determine if they violated Amazon policies like hateful content, explicit sexual content, biased responses, etc, and block such content before reaching end users.Tasks Performed:Worked as a Machine Learning Engineer• Developed and implemented the Responsible Alexa model to filter and block content violating policies.• Utilized the pre-trained BERT model and trained it on a custom dataset to classify and filter responses.• Used evaluation metrics like precision, recall, and F1-score and set thresholds for model evaluation.• Employed prompt engineering and fine-tuned the model for reliable responses.• Developed models to collect new data from Alexa traffic, classify it into subclasses, and provided data for the labeling team.• Evaluated model performance on different categories and improved it by collecting more training data.• Ensured ethical compliance by restricting Alexa from answering sensitive queries.• Created an internal chatbot for Q&A within Alexa Domain.• Used RAG models and Chroma DB for chatbot creation.• Collaborated with the team to achieve project milestones and ensure successful deployment.• Conducted continuous monitoring and maintenance for optimal performance.• Worked with AWS components like EC2, S3, Lambda, IAM, EKS clusters, and CloudWatch.• Used Docker for containerization and Jenkins for CI/CD.