DR
Divya Rayi
Contact details — on requestProof of Work — on request
Experience
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Data Analyst Intern
Vajra.ai · Jun 2025 – Mar 2026
- Cleaned and transformed 50k+ rows of raw sales data using Python (Pandas), reducing data errors by 25%.
- Designed an interactive Tableau dashboard to track monthly KPIs, saving the management team 10 hours of manual reporting per week.
- Developed complex SQL queries and joins to extract user behavior data from PostgreSQL databases for the marketing team.
- Performed A/B testing analysis on website landing pages, identifying a layout change that increased conversion rates by 8%.
- Automated weekly financial reports using Excel VBA and Power Query, improving reporting speed by 40%.
- Identified a 15% churn trend among premium users through exploratory data analysis (EDA), leading to a new retention strategy.
- Built and maintained data quality checks to catch missing values, duplicates, and outliers before reports reached stakeholders.
- Presented weekly analytics findings to cross-functional teams, translating technical results into clear business recommendations.
- Partnered with the product team to define key metrics and set up tracking for new feature launches.
Data Scientist
Vajra AI · Aug 2025 – Mar 2026
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Data Science Intern
Vajra.ai · Jun 2025 – Mar 2026
- Performed end-to-end data analysis on real-world healthcare and banking datasets — cleaning, preprocessing, and engineering features using Python (Pandas, NumPy, Scikit-learn) to ensure data quality and reliability.
- Built interactive Power BI dashboards with DAX measures, KPIs, slicers, and drill-throughs for business stakeholders, enabling data-driven decision-making on patient outcomes and revenue trends.
- Developed and deployed supervised ML models (Regression, Random Forest, XGBoost, Gradient Boosting) achieving measurable accuracy improvements through hyperparameter tuning and cross-validation.
- Designed unsupervised clustering models (K-Means) to segment banking customers by income, balance, and transaction behaviour — enabling targeted marketing and credit risk insights.
- Built deep learning architectures (ANN, CNN, MLP) using TensorFlow and PyTorch for pattern recognition; applied dropout regularisation and hyperparameter optimisation to reduce overfitting.
- Conducted thorough EDA — identifying trends, outliers, and correlations; produced clear visualisations (Matplotlib, Seaborn) for stakeholder presentations and business reports.
- Documented model experiments, pipelines, and outcomes in knowledge repositories; collaborated with senior developers to align ML solutions with business requirements.
V
Data Analyst
Vajra.ai · Jun 2025 – Mar 2026
- • Cleaned and transformed 50k+ rows of raw sales data using Python (Pandas), reducing data errors by 25% • Designed an interactive Tableau dashboard to track monthly KPIs, saving the management team 10 hours of manual reporting per week. • Developed complex SQL queries and joins to extract user behavior data from PostgreSQL databases for the marketing team • Performed A/B testing analysis on website landing pages, identifying a layout change that increased conversion rates by 8%. • Automated weekly financial reports using Excel VBA and Power Query, improving reporting speed by 40%. • Identified a 15% churn trend among premium users through exploratory data analysis (EDA), leading to a new retention strategy.
Data science & Analytics intern
Future Interns · Nov 2025 – Dec 2025
Skills 0 proven through work
Also works with
Data PreprocessingForecastingTransparent CommunicationTechnical Knowledge SharingTeamworkProfessional Skill DevelopmentProcess ImprovementReceiving and Incorporating FeedbackProblem SolvingSelf-Directed LearningFeature SelectionMachine Learning ApplicationOverfitting Detection and MitigationEnsemble LearningRecommendation Feature DevelopmentRisk and Controls AssessmentMicrosoft PowerPointConfusion Matrix AnalysisRecall Metric InterpretationPrecision Metric InterpretationAccuracy Metric InterpretationModel Metric Selection & InterpretationTrain-Test Split ValidationFeature EngineeringHeart Disease Prediction ModelingRandom Forest ModelingDecision Tree ModelingLogistic Regression ModelingModel Training ExecutionK-Means ClusteringClassification ModelingRegression AnalysisUnsupervised LearningSupervised LearningBusiness Value RealizationInventory ManagementData-Driven RecommendationsCampaign Performance AnalysisPrice Range AnalysisInventory AnalysisConversion Rate OptimizationMarket SegmentationData Integrity ManagementBusiness Logic ImplementationTime Series Trend AnalysisModel-Based ImputationRow DeletionManual Data CorrectionKPI AnalysisData VisualizationQuery WritingPattern RecognitionExploratory Data Analysis (EDA)Handling Data SparsityData ValidationAPI IntegrationDatabase ManagementDashboard UI DesignAnalytical Report CreationData TransformationPython DevelopmentPower BIMicrosoft ExcelBusiness IntelligenceTabular Data Cleaning & ValidationData CollectionData Science
Proof of Work
Proof of Work
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Education
B.Tech, Electronics and Communication Engineering
Audisankara College of Engineering and Technology, Gudur · 2021 — 2025
Contact details
Contact details
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