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gayathrichava/README.md

Hi, I'm Gayathri Chava πŸ‘‹

Data Analyst | SQL | Power BI | Tableau | Python | Excel

I'm a Data Analyst with a background in Data Analytics and Computer Science, focused on transforming data into clear, actionable insights.

I enjoy analysing data, identifying trends, building interactive dashboards, and using data visualisation to communicate findings that support data-driven decision-making.


πŸ› οΈ Technical Skills

πŸ“Š Data Analysis & Business Intelligence

  • SQL
  • Power BI
  • DAX
  • Power Query
  • Microsoft Excel
  • Data Cleaning
  • Data Transformation
  • Exploratory Data Analysis
  • Statistical Data Analysis

🐍 Programming & Data Processing

  • Python
  • Pandas
  • Data Cleaning
  • Data Transformation

πŸ“ˆ Data Visualisation & Dashboards

  • Tableau
  • Power BI
  • Plotly
  • Shiny
  • Dashboard Development
  • Data Visualisation

πŸ€– Machine Learning & NLP

  • Machine Learning
  • Natural Language Processing (NLP)
  • NLTK
  • Scikit-learn
  • Text Classification
  • Feature Engineering

πŸ“Š Featured Projects

Ireland Healthcare Waiting List Dashboard

Power BI | Power Query | DAX | Data Analysis

Interactive Power BI dashboard analysing Ireland healthcare waiting-list data across patient demographics, hospitals, waiting volumes, trends, and waiting-time categories.

πŸ”— View Project


Northern Ireland Speeding Offences Analysis

Tableau | Data Visualisation | Data Analysis

Interactive Tableau dashboard analysing 218,310 speeding offences across Northern Ireland, exploring trends by time of day, demographics, camera type, local government district, and offence outcomes.

πŸ”— View Project


πŸš† UK Railway Performance Analytics

Python | Pandas | Plotly | Shiny | Data Visualisation

Built an interactive dashboard to analyse UK railway performance using 30,000+ operational records.

  • Cleaned, transformed, and aggregated operational data.
  • Analysed delays, passenger flow, and route efficiency.
  • Created interactive visualisations for exploring operational performance.
  • Developed and deployed an interactive Shiny dashboard.

πŸ”— View Project


πŸ€– Hate Speech Classification Using NLP & Machine Learning

Python | NLP | Machine Learning | NLTK | Scikit-learn

Built an NLP-based classification system using 24,000+ text records.

  • Applied tokenisation, stopword removal, normalisation, and Bag-of-Words vectorisation.
  • Implemented Decision Tree and Naive Bayes classification models.
  • Improved classification accuracy from 80% to 87%.
  • Evaluated model performance using confusion matrices, precision-recall metrics, and cross-validation.

πŸ’Ό Experience

Data Analyst Intern β€” Cognifyz Technologies

Jan 2024 – Feb 2024 | Remote

  • Analysed restaurant datasets to identify cuisine, rating, and pricing trends.
  • Performed exploratory data analysis using Python, Pandas, Seaborn, and Matplotlib.
  • Automated reporting workflows to reduce manual effort.
  • Analysed delivery and booking data to identify growth opportunities.
  • Delivered data-driven insights to support marketing and business decisions.

Data Science Intern β€” 1Stop.ai

May 2023 – Jul 2023 | Remote

  • Built a supervised machine learning and NLP model for hate-speech classification, improving accuracy from 80% to 87%.
  • Cleaned and processed 24,000+ text records using NLP preprocessing and vectorisation techniques.
  • Implemented Decision Tree and Naive Bayes classification models using Bag-of-Words.
  • Applied feature engineering and NLP preprocessing to improve model stability.

πŸŽ“ Education

M.Sc. Data Analytics

Dundalk Institute of Technology 2024 – 2025

B.Tech. Computer Science and Engineering

Bapatla Engineering College 2020 – 2024


πŸ“œ Certifications

  • Deloitte Australia – Data Analytics Job Simulation β€” Forage | March 2026
  • Data Visualisation: Empowering Business with Effective Insights β€” Forage | March 2026

πŸš€ What I'm Looking For

I'm currently seeking Data Analyst opportunities where I can apply SQL, Power BI, Tableau, Python, Excel, and data visualisation to analyse real-world data, identify meaningful insights, and support data-driven business decisions.


πŸ“« Connect With Me

πŸ’Ό LinkedIn

πŸ’» GitHub


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  1. Ireland-Healthcare-Waiting-List-Dashboard Ireland-Healthcare-Waiting-List-Dashboard Public

    Interactive Power BI dashboard analysing Ireland healthcare waiting lists, patient demographics, hospital-level waiting volumes, trends, and waiting-time categories.

    1

  2. UK-Railway-Performance-Analytics UK-Railway-Performance-Analytics Public

    Interactive UK railway performance dashboard built with Python, Shiny and Plotly.

    Python 1

  3. Northern-Ireland-Speeding-Offences-Analysis Northern-Ireland-Speeding-Offences-Analysis Public

    Tableau dashboard analysing speeding offences across Northern Ireland, with insights into trends, demographics, camera types, locations, and offence outcomes.

    1