Sai Srivatsa Thangallapelly
Data Science EnthusiastData Engineer with 6+ years of experience building scalable cloud-based ETL pipelines, real-time data streams, and analytics workflows. Delivered high-impact data solutions at Fortune 500 companies like Google and CVS using Python, SQL, Apache Spark, PowerBI and GCP.
Technologies
Experience
Data Engineer - CVS Health
June 2025 - Present
Developing core components for CVS Health’s enterprise data warehouse and reporting ecosystem. Built and maintained scalable ETL workflows using SQL and SAS to process millions of healthcare records. Integrated Oracle-based financial and clinical data into reporting pipelines. Collaborated with cross-functional teams to ensure HIPAA compliance, accurate reporting, and performance guarantees for clients including City of Philadelphia and FMC.
Data Engineer - Idamta
Sep 2024 - June 2025
Built scalable real-time and batch data pipelines using Apache Spark and Databricks for ingesting high-volume structured and semi-structured data. Developed GCP-native workflows with Dataflow, Cloud Composer, and BigQuery for operational reporting and self-service analytics. Automated data quality checks and collaborated with cross-functional teams to deliver reliable data products for BI and ML use cases.
Data Engineer (Client: Cisco) - Wings of Hope
Jan 2024 - May 2024
Architected high-performance ETL pipelines using Apache Spark to process 1TB+ of data monthly, improving query execution efficiency by 40%. Automated data ingestion with Airflow & Kafka, reducing manual intervention by 60%. Developed a scalable data pipeline for aviation data management across 10+ bases, ensuring high data integrity and operational efficiency. Designed Power BI, AWS QuickSight, and Tableau dashboards, reducing manual reporting by 50% and streamlining business reporting by 40%.
Graduate Assistant - Maryville University of Saint Louis
Jan 2024 - May 2024
Implemented and productionized a Student Retention Model, significantly enhancing retention rates. Utilized R and Tableau to analyze and visualize organizational event data, increasing attendance by 25%. Generated semester reports to optimize event planning and identify key contributors.
Data Engineer - BeyondID
Jan 2022 - Dec 2022
Created real-time data pipelines for security analytics, integrating Okta SSO, AWS IAM, and Azure AD. Automated user provisioning workflows using Terraform and Jenkins, reducing processing time by 50% while ensuring data consistency.
Senior Data Analyst (Client: Google) - GlobalLogic - A Hitachi Group Company
Nov 2019 - Jan 2022
Refined ETL pipelines with SQL & Airflow, cutting financial report generation time by 50%. Developed ML pipelines for Google’s Core ML team using Kafka, BigQuery, and GCP, improving real-time data tracking by 30%. Built an NLP chatbot using SpaCy and TF-IDF, increasing internal data query response accuracy by 40%.
Data Analyst - Stridez Solutions India Pvt Ltd
Nov 2018 - Apr 2019
Developed and maintained web applications using HTML, CSS, JavaScript, and Bootstrap. Improved page load speed by 30% through frontend optimization. Enhanced backend functionality with efficient MySQL database management and query optimization.
Research Intern - Defence Research and Development Organisation (DRDO)
Jun 2018 - Jul 2018
Conducted research on morphological operations for digital image preprocessing using MATLAB and Python. Enhanced image datasets for defense applications with dilation and erosion techniques. Optimized algorithms to eliminate structural flaws and reduce noise, improving image quality by 35%.
Projects
AWS Cloud Data Pipeline: End-to-End Data Engineering
Designed an end-to-end data pipeline using AWS Glue, S3, Athena, and QuickSight for scalable data analytics and visualization.
Walmart Sales Analysis with PostgreSQL
Performed end-to-end sales analysis on Walmart’s transaction data using PostgreSQL. Analyzed revenue trends, customer demographics, and product performance to optimize business strategies.
Retail Orders Analysis with Python & SQL
Built an end-to-end data analytics pipeline for retail order analysis, integrating SQL, Python, and Pandas for data transformation, visualization, and reporting.
Mastering PySpark: Big Data Analysis with Flight Delays
Implemented big data analysis using PySpark on flight delay data. Optimized query execution, built predictive models, and enhanced data processing efficiency.
Education
Maryville University of Saint Louis
Master of Science - MS, Data Science
Jan 2023 - May 2024
Grade: 4/4
Mahatma Gandhi Institute of Technology
Bachelor of Technology - BTech, Electronics and Communications Engineering
2015 - 2019
Grade: 7.5/10
Certifications and Recognitions
Certifications
Academy Accreditation - Databricks Lakehouse Fundamentals
Issued by Databricks · May 2023
Credential ID: 73624532
View CredentialsSalesforce Certified Associate
Issued by Salesforce · May 2023
Credential ID: 3369154
Recognitions
Office of Diversity's Special Recognition for Graduate Assistantship
Issued by Maryville University · April 2024
Recognized for outstanding efforts in promoting diversity and inclusion through impactful contributions and leadership initiatives.
International Student Delgate to Represent Maryville University for State Capitol Visit
Issued by Maryville University · April 2024
Nominated as a delegate to represent Maryville University at the International Education Day in Jefferson City, Missouri, recognizing outstanding achievements and contributions to global awareness and cultural exchange.
Raving Fan
Issued by BeyondID · September 2022
Recognized for building strong client relationships and delivering exceptional service, earning the 'Raving Fan' title for exceeding client expectations.
The Work-o-Joylic
Issued by GlobalLogic · August 2021
Consistently delivered exceptional performance, earning recognition for outstanding productivity and teamwork excellence.
GOLD medal for outstanding performance in Critical Thinking
Issued by EDURANET INTELLECTUAL OLYMPIAD FOUNDATION · January 2012
Recognized for exceptional critical thinking and creative skills at the zonal level.
Recommendations
Tiffany Nelson, MA - Director of Programs and Evaluation | Advocate for Human Rights
Tiffany praised Sai’s exceptional data visualization and analysis skills, emphasizing his ability to produce impactful reports.
View LinkedIn ProfileCameron Johnson - Program Coordinator - Center for Student Engagement and Belonging
Cameron recognized Sai’s professionalism, collaborative spirit, and impactful contributions to diversity programs at Maryville University.
View LinkedIn ProfileProf. David Snell - AI & Machine Learning Instructor at Maryville University
David applauded Sai’s dedication to learning, collaborative contributions to group projects, and active involvement in student programs.
View LinkedIn ProfileProf. Shree Adhikari, FCAS, MAAA - Adjunct Instructor at Maryville University
Shree emphasized Sai’s proficiency in Python and data science concepts, commending his exceptional class participation.
View LinkedIn ProfileSneh Shankar Jha - Service Delivery Manager at BeyondID
Sneh highlighted Sai’s analytical mindset, technical expertise, and collaborative communication during their work together at BeyondID.
View LinkedIn ProfileRia Chowdhury - Technical Consultant at GlobalLogic
Ria commended Sai for his positive energy, quick learning, and reliability as her go-to person for new projects during his tenure.
View LinkedIn ProfileGet in Touch
Dallas, Texas, USA
+1 (314) 516-3740