Devendar Narahari
Sr Data Engineer at T-Mobile
- Role
- Sr Data Engineer at HCLTech
- Location
- Bellevue, WA, US
- LinkedIn followers
- 500 followers
About Devendar Narahari
Professional Summary14+ years of IT experience in design, development and all phases of software development lifecycle using SCRUM, Agile, Waterfall methodologies. Highly proficient in developing Data Warehouse workflow that includes SQL Server Data tools/BIDS, Power BI, MS SQL Server, Teradata, Netezza, Hive, Amazon RedShift and Oracle. Expertise in Retail, Mobile Data Services, Mobile Ad Management, Healthcare, CRM and Government industries. Presently working as a Data Engineer at Nordstrom.
Experience
Sr Data Engineer
Jul 2020 — Present · Bellevue, WA, US
Led the creation of comprehensive requirements documents for migration projects, ensuring clarity and alignment with project goals.• Improved performance in SMBi PostgreSQL queries, enhancing database efficiency and responsiveness.• Developed various PowerBI dashboards for data visualizations, providing actionable insights for decision-making.• Utilized SSDT packages with MS BI Stack (T-SQL, SSIS) for data loading in the Sales Database (SHMS).• Developed Python migration scripts to extract data from Oracle (WCS) and load it into PostgreSQL.• Created Power BI dashboards for visualizing Personally Identifiable Information (PII) data and Account Hub, querying data from RedShift.• Worked on OLM Data Model, facilitating data loading into PostgreSQL Database.• Developed PostgreSQL functions and triggers to capture changes resulting from data modifications.• Implemented Airflow Directed Acyclic Graphs (DAGs) on AWS to load data from AWS S3 to Snowflake, following the Extract, Load, Transform (ELT) approach.• Utilized Python libraries, including Pandas, Matplotlib, and NumPy, for data analysis and visualization.• Implemented data ingestion and aggregation through curated views, optimizing data accessibility.• Parsed JSON values into multiple columns for loading into Snowflake Cloud Data Warehouse.• Conducted a Proof of Concept (POC) for Azure Databricks and PySpark, exploring possibilities for data processing and analytics.
Education
Kakatiya University
Master of Computer Applications (MCA), Computer Science
1996 — 1999
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