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Rajeshwari Arra

Data Analyst

About Rajeshwari

Data-Driven Data Analyst with over 3+ years of experience specializing in data analytics, visualization, and  predictive modelling. Expert in SQL, Python, Power BI, and Tableau, with a proven track record of optimizing  data workflows, reducing processing time by 20%, and driving strategic decision-making. I am skilled in  working with big data tools like Databricks and Apache Spark, as well as cloud platforms such as AWS.  Adept at collaborating across business units to transform data insights into impactful business outcomes. I am passionate about solving complex data challenges and committed to advancing data-driven solutions.

Work Experience

June 2024 - Present
Data Analyst
Appworks

● Spearheaded ETL pipeline automation, cutting reporting delays by 25% through Alteryx and SQL.

● Developed Power BI dashboards that enhanced KPI tracking and decision-making speed by 20%.

  • Developed and maintained ETL workflows using SSIS to automate data extraction, transformation, and loading from multiple source systems into SQL Server.

 

● Partnered with infrastructure teams to optimize AWS-based storage,reducing costs by 15% while scaling data  accessibility. 

●  Integrated Hive with Hadoop ecosystem tools like HDFS, MapReduce, Pig, and Spark.

  • Developed and optimized T-SQL stored procedures, triggers, and user-defined functions in SQL Server.

 

  • Implemented error handling and transaction control in T-SQL to ensure data consistency and reliability.

  • Designed and implemented efficient ETL pipelines for large datasets, ensuring high data accuracy and integrity across production environments.

 

Sept 2023- May 2024
Data Analyst
Graduate Teaching Assistant
  • Assisted in grading assignments focused on statistical analysis and data modeling, providing detailed  feedback that enhanced students’ comprehension of complex datasets and improved their academic  performance by 20%. 

  • Applied tools like SQL and Excel to teach practical data analysis techniques, leading lab sessions and  one-on-one tutoring that increased student proficiency in handling real-world datasets. 

  •  Guided students in data cleaning and preprocessing, implementing best practices for managing missing  values and outliers using python, resulting in a 30% improvement in data accuracy and reliability for  analysis.

  • Automated business logic using T-SQL scripts for reporting, data transformation, and batch processing.

  • Used temporary tables, table variables, and CTEs to simplify complex queries in T-SQL.

 

  • Developed and maintained partitioned and bucketed Hive tables to improve query performance and  manage big data efficiently. 

Nov 2020- july 2022
Junior Data Analyst
Logisol Technologies
  •  Integrated datasets from multiple sources using Python and Power Query, saving 30% of reporting time.

  • Conducted statistical analyses that revealed insights, improving operational efficiency by 10%. 

  • Tuned long-running T-SQL queries using execution plans and performance tuning techniques.

  • Integrated T-SQL scripts into SSIS packages for robust ETL workflows.

      ● Designed NLP models to process customer reviews, yielding actionable insights for product improvement.

       ● Designed and optimized complex HiveQL queries for ETL pipelines and data analysis tasks on  

           large datasets.

 

  • Performed data transformation tasks such as filtering, cleansing, deduplication, and applying business rules to support reporting and analytics.

  • Scheduled and monitored ETL jobs using SQL Server Agent, with proactive error handling and performance logging.

Education & Training

Sep 2022- May 2024
Computer Science
Rowan University
Pursuing a Master’s in Computer Science provided me with a deep understanding of advanced computing concepts, programming, and problem-solving techniques. The program covered key areas such as algorithms, data structures, databases, machine learning, artificial intelligence, software engineering, and data analytics. Through hands-on projects, research, and real-world applications, I developed strong skills in Python, Java, SQL, and data processing tools, along with a solid foundation in mathematics, statistics, and system design. The experience sharpened my ability to build scalable solutions, analyze complex datasets, and apply logical thinking to technical challenges. This degree not only enhanced my technical expertise but also strengthened my analytical thinking, teamwork, and communication skills—essential qualities for solving problems in today's data-driven world.

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