ZARNAPPA EARNOOR
Senior Data Scientist
Bangalore
Summary
Senior Data Scientist with 14+ years of overall experience, including 4+ years in AI, delivering data-driven solutions across Telecom, Wireless, and IoT domains. Specialized in transforming large-scale, complex datasets into actionable insights and building intelligent systems that drive measurable business outcomes. Adept at designing scalable data pipelines, performing advanced statistical analysis, and developing machine learning models for predictive analytics, customer behavior insights, and revenue optimization. Experienced in handling structured and semi-structured data, enabling organizations to improve decision-making, operational efficiency, and marketing effectiveness.
Overview
15
15
years of professional experience
1
1
Certification
Work History
Senior Data Scientist
Comcast Cable Communications
Philadelphia, USA
05.2022 - Current
- Developed an AI-powered conversational assistant for Xfinity users using Retrieval-Augmented Generation (RAG), LangChain, and Together AI. The solution enabled customers to troubleshoot security devices, access product and service information, and receive contextual support through natural language interactions.
- Designed and implemented an end-to-end RAG architecture integrating LLMs with Xfinity knowledge bases, FAQs, and support documentation.
- Built semantic search pipelines using embeddings, document chunking, and vector databases (FAISS/ChromaDB) to improve retrieval accuracy and contextual relevance.
- Leveraged LangChain for conversational orchestration, prompt management, memory handling, and retrieval workflows.
- Enhanced customer experience through intelligent self-service support.
- Improved information retrieval of accuracy and response relevance using RAG-based contextual grounding.
- Established a scalable foundation for future AI-driven customer support and automation initiatives.
- Xfinity Assistant – AI-Powered Customer Support Chatbot. Developed an AI-powered conversational assistant for Xfinity users using Retrieval-Augmented Generation (RAG), LangChain, and Together AI.
- Technologies: Python, LangChain, Together AI, RAG, FAISS/ChromaDB, Vector Databases, Embeddings, Prompt Engineering, PyTorch.
Senior Data Scientist
Comcast Cable Communications
Philadelphia, USA
05.2022 - Current
- Conducted Year-over-Year Revenue Trend Analysis on Comcast Xfinity Black Friday sales, identifying consistent growth patterns and peak-performing periods to guide future promotional strategy.
- Executed Product Category Performance Analysis uncovering the top 5 revenue-driving categories contributing ~70% of total revenue, enabling focused inventory planning and marketing prioritization.
- Comcast Discount Impact & Optimization: Optimal 25–35% Discount Strategy to Maximize Revenue Uplift While Preserving Profitability.
- Executed data cleaning, transformation, and exploratory data analysis (EDA) using Pandas and NumPy to ensure data quality and reliability.
- Collaborated cross-functionally with business, marketing, and product teams to translate analytical findings into actionable strategies.
- Integrated insights into business workflows, supporting data-driven decision-making, and strategic planning.
- Applied statistical analysis and hypothesis testing to validate business insights and model outcomes.
- Delivered executive-ready visualizations via Tableau, translating complex model outputs into clear business narratives for senior stakeholders.
- Retail Data Analytics & Comcast Customer Behavior Modeling. Led end-to-end retail analytics initiative processing 500K+ transactional records across mobile app and web browser channels.
- Tools: Python, PyCharm, MS Visual Studio, MySQL, Tableau, Confluence, Slack, Time Series, seaborn, Pandas, NumPy, scipy, scikit-learn, PyTorch.
Lead Engineer
Comcast Cable Communications
Philadelphia, USA
01.2020 - 02.2022
- Analyzed business flow diagrams and user stories planned for each sprint; created comprehensive test plan documents.
- Building multi-agent workflow for problem solving, orchestration, and collaboration.
- Designed test cases and automation scripts using Maestro/GitHub Copilot for Android; wrote native Espresso automation scripts.
- Created Appium scripts for iOS and Android real device execution, analyzing test results and resolving failures.
- Performed early feature branch validation, multi-OS/device/platform test coverage, and defect lifecycle management.
- Xfinity Home | Smart Home IoT Platform | Syndication Partners. SME for Xfinity Home, Xfinity platform (Mobile Smart Home IoT Client) and Syndication Partners (Cox, Rogers, Sky, Videotron).
- Tools: Python, Maestro Studio, GitHub copilot, ALM Octane, Jira, PostgreSQL, Android Studio, Xcode, Firebase, Sauce Labs, Slack, Agentic AI (Amazon sage Maker).
Senior Automation Engineer
Comcast Cable Communications
Philadelphia, USA
01.2018 - 01.2020
- Prepared business requirements, user stories, and tested Amdocs CRM, OMS, AR, ANM, and SOM for all buy-flow scenarios.
- Performed system integration testing for provisioning activation of double play, triple play, and quad play.
- Served as Test Architect for framing strategies for biller migration and guiding the test team.
- Created automated test scripts using Python.
- Backend API Automation Testing – Xfinity Mobile Services. SME for NextGen Billing System on Amdocs Platforms covering OSS and BSS of XM Architecture in Amdocs 10.0 CES.
- Tools: Python, Rally, Postman, SoapUI, BDD Cucumber, Jenkins, RESTful Web Services, Amdocs CRM/SOM/AMC.
Senior Automation Engineer
Altice USA
Bangalore, India
09.2016 - 12.2018
- Automated STB features: Home Screen, Live TV, Info Bar, IMDb, On Demand, OTT apps, Parental Control, Sports, Search, and Quick Guide.
- Set-Top Box (STB) End-to-End Automation. Developed automation scripts in Python using StormTest and Appium frameworks to verify Altice STB functionalities.
- Tools: Python, PyCharm, StormTest, HP ALM, Jira, PostgreSQL.
Senior Analyst
Rohde & Schwarz R&D
Singapore
08.2013 - 12.2015
- Developed test scenarios covering cell configuration, initial attach procedures, RRC, and S1AP protocols.
- Managed customer issues for Qualcomm, MediaTek, Intel, Samsung, LG, and Korean Telecom.
- LTE RRC Protocol Testing – AT&T USA. Designed and developed test plans for LTE RRC features, system testing, and test equipment validation for CMW500 using the MLAPI framework.
- Tools: R&S CMW500, Qxdm, QCAT, QPST, IBM Rational ClearCase, MS Visual Studio.
Engineer – I
Powerwave R&D Technologies
Hyderabad, India
08.2011 - 05.2013
- Validated LTE pico cell full-stack features; handled test plans, execution, defect reporting, and bug verification.
- LTE Functional & Integration Testing. Performed functional and integration testing of LTE features: attach/detach, broadcast system info, RRC, S1AP, RRM, downlink/uplink data, and radio link failure.
Education
Scaler - Data Science & Machine Learning (DSML)
Scaler
01.2027
Executive PG - Data Science & AI
IIT Roorkee (iHub)
ME/MTech - undefined
People Education Society
01.2026
BE/BTech - undefined
Bangalore Institute of Technology
01.2007
Skills
- Python
- SQL
- PostgreSQL
- MySQL
- Tableau
- Power BI
- Matplotlib
- Seaborn
- Pandas
- NumPy
- SciPy
- Scikit-learn
- PyTorch
- AWS
- Docker
- CI/CD
- GitHub Actions
- GCP
- Azure
- Git
- GitHub
- SVN
- Visual Studio
- PyCharm
- Google Colab
- Postman
- REST API
- Firebase
- ALM octane
- Jira
- Confluence
- ChatGPT
- Claude AI
- Gemini AI
- Agentic AI
- Generative AI
- LLMs
- RAGs
- MCP
- FastAPI
- Statistical Modelling
- Prompt Engineering
- Product Analytics
Certification
- AWS Solution Architect – Associate
- Professional Scrum Master I (PSM I) – Scrum.org
- Professional Scrum Master II (PSM II) – Scrum.org
- Python for Data Science - IBM
Timeline
Senior Data Scientist
Comcast Cable Communications
05.2022 - Current
Senior Data Scientist
Comcast Cable Communications
05.2022 - Current
Lead Engineer
Comcast Cable Communications
01.2020 - 02.2022
Senior Automation Engineer
Comcast Cable Communications
01.2018 - 01.2020
Senior Automation Engineer
Altice USA
09.2016 - 12.2018
Senior Analyst
Rohde & Schwarz R&D
08.2013 - 12.2015
Engineer – I
Powerwave R&D Technologies
08.2011 - 05.2013
Scaler - Data Science & Machine Learning (DSML)
Scaler
Executive PG - Data Science & AI
IIT Roorkee (iHub)
ME/MTech - undefined
People Education Society
BE/BTech - undefined
Bangalore Institute of Technology