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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Ujjwal Singh Rao - Kaggle Portfolio</title>
<link rel="stylesheet" href="styles.css">
<link href="https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&display=swap" rel="stylesheet">
</head>
<body>
<!-- Header -->
<header class="header">
<div class="container">
<div class="header-content">
<h1 class="name">Ujjwal Singh Rao</h1>
<p class="tagline">Kaggle Master | ML Engineer | Data Scientist</p>
<div class="links">
<a href="https://www.kaggle.com/brightertiger" target="_blank">🏆 Kaggle</a>
<a href="https://github.com/brightertiger" target="_blank">GitHub</a>
<a href="https://linkedin.com/in/brightertiger" target="_blank">LinkedIn</a>
<a href="https://brightertiger.xyz" target="_blank">Website</a>
</div>
</div>
</div>
</header>
<!-- Stats Section -->
<section class="about">
<div class="container">
<p class="about-text">
Kaggle Master with 3 Gold, 12 Silver, and 4 Bronze medals across 20 competitions.
Expertise in NLP, Computer Vision, Medical Imaging, and Optimization.
Highest rank: #3 out of 1,621 teams (Jigsaw Multilingual).
</p>
</div>
</section>
<!-- Projects Section -->
<section class="projects">
<div class="container">
<h2>🏆 Competition Portfolio</h2>
<p class="projects-subtitle">3 Gold 🥇 | 12 Silver 🥈 | 4 Bronze 🥉</p>
<div class="projects-grid">
<!-- Gold Medal Projects -->
<div class="project-card gold">
<div class="project-header">
<h3>Jigsaw Multilingual Toxic Comment Classification</h3>
<div class="medal">🥇 #3 / 1,621</div>
</div>
<p class="project-description">Top 0.2% finish. Multilingual toxicity detection using XLM-RoBERTa with TPU training and adversarial validation.</p>
<div class="project-tags">
<span class="tag">NLP</span>
<span class="tag">TPU</span>
<span class="tag">Multilingual</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/jigsaw-multilingual-toxic-comment-classification" target="_blank">Competition</a>
<a href="jigsawml/">Code</a>
</div>
</div>
<div class="project-card gold">
<div class="project-header">
<h3>SIIM-ISIC Melanoma Classification</h3>
<div class="medal">🥇 #6 / 3,308</div>
</div>
<p class="project-description">Top 0.2% finish. Melanoma detection using EfficientNet with metadata fusion and test-time augmentation.</p>
<div class="project-tags">
<span class="tag">Medical Imaging</span>
<span class="tag">EfficientNet</span>
<span class="tag">TTA</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/siim-isic-melanoma-classification" target="_blank">Competition</a>
<a href="siim/">Code</a>
</div>
</div>
<div class="project-card gold">
<div class="project-header">
<h3>TalkingData AdTracking Fraud Detection</h3>
<div class="medal">🥇 #16 / 3,943</div>
</div>
<p class="project-description">Top 0.4% finish. Large-scale click fraud detection using LightGBM with advanced feature engineering on 200M+ rows.</p>
<div class="project-tags">
<span class="tag">Fraud Detection</span>
<span class="tag">LightGBM</span>
<span class="tag">Big Data</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/talkingdata-adtracking-fraud-detection" target="_blank">Competition</a>
<a href="talking/">Code</a>
</div>
</div>
<!-- Silver Medal Projects -->
<div class="project-card silver">
<div class="project-header">
<h3>Avito Demand Prediction</h3>
<div class="medal">🥈 #21 / 1,868</div>
</div>
<p class="project-description">Top 1.1% finish. Demand prediction combining NLP, image features, and tabular data with ensemble methods.</p>
<div class="project-tags">
<span class="tag">Multimodal</span>
<span class="tag">Ensemble</span>
<span class="tag">NLP</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/avito-demand-prediction-challenge" target="_blank">Competition</a>
<a href="avito/">Code</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>Google QUEST Q&A Labeling</h3>
<div class="medal">🥈 #21 / 1,571</div>
</div>
<p class="project-description">Top 1.3% finish. Q&A quality prediction using BERT and RoBERTa with custom head architectures.</p>
<div class="project-tags">
<span class="tag">NLP</span>
<span class="tag">BERT</span>
<span class="tag">Q&A</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/google-quest-challenge" target="_blank">Competition</a>
<a href="quest/">Code</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>Instacart Market Basket Analysis</h3>
<div class="medal">🥈 #22 / 2,621</div>
</div>
<p class="project-description">Top 0.8% finish. Product reorder prediction using gradient boosting with extensive feature engineering.</p>
<div class="project-tags">
<span class="tag">Recommendation</span>
<span class="tag">XGBoost</span>
<span class="tag">Features</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/instacart-market-basket-analysis" target="_blank">Competition</a>
<a href="amexpert/">Code</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>Santa Gift Matching Challenge</h3>
<div class="medal">🥈 #26 / 428</div>
</div>
<p class="project-description">Top 6% finish. Combinatorial optimization for gift matching using Hungarian algorithm and simulated annealing.</p>
<div class="project-tags">
<span class="tag">Optimization</span>
<span class="tag">Algorithms</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/santa-gift-matching-challenge" target="_blank">Competition</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>Toxic Comment Classification</h3>
<div class="medal">🥈 #29 / 4,539</div>
</div>
<p class="project-description">Top 0.6% finish. Multi-label toxicity classification using bidirectional LSTM with attention and CNN ensemble.</p>
<div class="project-tags">
<span class="tag">NLP</span>
<span class="tag">LSTM</span>
<span class="tag">Attention</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/jigsaw-toxic-comment-classification-challenge" target="_blank">Competition</a>
<a href="toxic/">Code</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>SIIM-ACR Pneumothorax Segmentation</h3>
<div class="medal">🥈 #32 / 1,475</div>
</div>
<p class="project-description">Top 2.2% finish. Chest X-ray segmentation using U-Net with EfficientNet encoder and deep supervision.</p>
<div class="project-tags">
<span class="tag">Medical Imaging</span>
<span class="tag">Segmentation</span>
<span class="tag">U-Net</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/siim-acr-pneumothorax-segmentation" target="_blank">Competition</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>Gendered Pronoun Resolution</h3>
<div class="medal">🥈 #41 / 838</div>
</div>
<p class="project-description">Top 4.9% finish. Coreference resolution using BERT with span extraction and entity embeddings.</p>
<div class="project-tags">
<span class="tag">NLP</span>
<span class="tag">BERT</span>
<span class="tag">Coreference</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/gendered-pronoun-resolution" target="_blank">Competition</a>
<a href="pronoun/">Code</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>Santa's Workshop Tour 2019</h3>
<div class="medal">🥈 #44 / 1,618</div>
</div>
<p class="project-description">Top 2.7% finish. Constraint satisfaction optimization using mixed integer programming and local search.</p>
<div class="project-tags">
<span class="tag">Optimization</span>
<span class="tag">Constraints</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/santa-workshop-tour-2019" target="_blank">Competition</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>RSNA Intracranial Hemorrhage Detection</h3>
<div class="medal">🥈 #58 / 1,345</div>
</div>
<p class="project-description">Top 4.3% finish. CT scan hemorrhage detection using ResNeXt with windowing and sequence modeling.</p>
<div class="project-tags">
<span class="tag">Medical Imaging</span>
<span class="tag">DICOM</span>
<span class="tag">CNN</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/rsna-intracranial-hemorrhage-detection" target="_blank">Competition</a>
<a href="rsna/">Code</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>APTOS 2019 Blindness Detection</h3>
<div class="medal">🥈 #75 / 2,928</div>
</div>
<p class="project-description">Top 2.6% finish. Diabetic retinopathy detection using EfficientNet with ordinal regression.</p>
<div class="project-tags">
<span class="tag">Medical Imaging</span>
<span class="tag">EfficientNet</span>
<span class="tag">Ordinal</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/aptos2019-blindness-detection" target="_blank">Competition</a>
<a href="aptos/">Code</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>CommonLit Readability Prize</h3>
<div class="medal">🥈 #91 / 3,633</div>
</div>
<p class="project-description">Top 2.5% finish. Text complexity prediction using RoBERTa with regression head and pseudo-labeling.</p>
<div class="project-tags">
<span class="tag">NLP</span>
<span class="tag">RoBERTa</span>
<span class="tag">Regression</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/commonlitreadabilityprize" target="_blank">Competition</a>
</div>
</div>
<div class="project-card silver">
<div class="project-header">
<h3>Jigsaw Unintended Bias in Toxicity</h3>
<div class="medal">🥈 #146 / 3,165</div>
</div>
<p class="project-description">Top 4.6% finish. Bias-aware toxicity detection using BERT with custom loss functions for fairness.</p>
<div class="project-tags">
<span class="tag">NLP</span>
<span class="tag">BERT</span>
<span class="tag">Fairness</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/jigsaw-unintended-bias-in-toxicity-classification" target="_blank">Competition</a>
<a href="jigsaw/">Code</a>
</div>
</div>
<!-- Bronze Medal Projects -->
<div class="project-card bronze">
<div class="project-header">
<h3>iMet Collection 2019 - FGVC6</h3>
<div class="medal">🥉 #61 / 521</div>
</div>
<p class="project-description">Top 11.7% finish. Multi-label artwork classification using ResNeXt with focal loss.</p>
<div class="project-tags">
<span class="tag">Computer Vision</span>
<span class="tag">Multi-label</span>
<span class="tag">ResNeXt</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/imet-2019-fgvc6" target="_blank">Competition</a>
<a href="imet/">Code</a>
</div>
</div>
<div class="project-card bronze">
<div class="project-header">
<h3>Rainforest Connection Species Audio Detection</h3>
<div class="medal">🥉 #78 / 1,143</div>
</div>
<p class="project-description">Top 6.8% finish. Species detection from audio using mel-spectrograms with EfficientNet.</p>
<div class="project-tags">
<span class="tag">Audio</span>
<span class="tag">Spectrograms</span>
<span class="tag">CNN</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/rfcx-species-audio-detection" target="_blank">Competition</a>
<a href="rfcx/">Code</a>
</div>
</div>
<div class="project-card bronze">
<div class="project-header">
<h3>Tweet Sentiment Extraction</h3>
<div class="medal">🥉 #208 / 2,225</div>
</div>
<p class="project-description">Top 9.3% finish. Sentiment phrase extraction using RoBERTa with character-level span prediction.</p>
<div class="project-tags">
<span class="tag">NLP</span>
<span class="tag">RoBERTa</span>
<span class="tag">Extraction</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/tweet-sentiment-extraction" target="_blank">Competition</a>
<a href="tweet/">Code</a>
</div>
</div>
<div class="project-card bronze">
<div class="project-header">
<h3>TGS Salt Identification Challenge</h3>
<div class="medal">🥉 #292 / 3,219</div>
</div>
<p class="project-description">Top 9.1% finish. Seismic image segmentation using U-Net with ResNet encoder and deep supervision.</p>
<div class="project-tags">
<span class="tag">Segmentation</span>
<span class="tag">U-Net</span>
<span class="tag">Geoscience</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/tgs-salt-identification-challenge" target="_blank">Competition</a>
<a href="salt/">Code</a>
</div>
</div>
<!-- Other Projects -->
<div class="project-card">
<div class="project-header">
<h3>Quick, Draw! Doodle Recognition</h3>
<div class="medal">📊 #138 / 1,309</div>
</div>
<p class="project-description">Sketch recognition using ResNet with stroke sequence augmentation and test-time augmentation.</p>
<div class="project-tags">
<span class="tag">Computer Vision</span>
<span class="tag">Sketches</span>
<span class="tag">ResNet</span>
</div>
<div class="project-links">
<a href="https://www.kaggle.com/competitions/quickdraw-doodle-recognition" target="_blank">Competition</a>
<a href="doodle/">Code</a>
</div>
</div>
</div>
</div>
</section>
<!-- Footer -->
<footer class="footer">
<div class="container">
<div class="footer-links">
<a href="https://github.com/brightertiger" target="_blank">GitHub</a>
<a href="https://linkedin.com/in/brightertiger" target="_blank">LinkedIn</a>
<a href="https://brightertiger.xyz" target="_blank">Website</a>
<a href="https://kaggle.com/brightertiger" target="_blank">🏆 Kaggle</a>
</div>
</div>
</footer>
</body>
</html>