Alwin J

Alwin J

Aspiring Data Analyst and Machine Learning Enthusiast
India
Kannada, Tamil, English
Apprenticeship On-site

About Me

Aspiring Data Analyst and Machine Learning Enthusiast pursuing B.Tech in Data Science with strong skills in Python, SQL, and data analysis. Experienced in predictive modeling, feature engineering, and exploratory data an…

Experience

Full-Stack Developer Intern

Cognifyz Technologies · Bangalore, India
May 2026 - Jun 2026 · 1 month

<p>Built a full-stack expense tracking web application with server-side rendering, RESTful APIs, and persistent data storage.</p><p> Designed and implemented a RESTful API supporting full CRUD operations (GET, POST, DELETE) for expense records.</p><p> Integrated SQLite database with structured schemas for users and expenses, replacing in-memory storage with persistent data.</p><p> Implemented user authentication and session management (register, login, logout) using express-session.</p><p> Built protected routes with middleware-based access control, restricting the dashboard to authenticated users only.</p>

Machine Learning Intern

Zephyr Technologies Inc · Bangalore, India
Apr 2025 - May 2025 · 30 days

<p>Developed a supervised machine learning model for heart disease prediction achieving approximately 85% accuracy on structured healthcare data.</p><p> Processed and analyzed 500+ patient records including lifestyle habits and clinical features to build reliable prediction models.</p><p> Performed feature engineering and exploratory data analysis to identify key risk factors influencing heart disease outcomes.</p><p> Implemented and compared 3 classification algorithms (Logistic Regression, Decision Tree, Random Forest) to optimize model performance.</p><p> Improved model accuracy by approximately 5–10% through iterative testing and tuning of model parameters.</p><p> Evaluated model performance using accuracy, precision, recall, and F1-score to select the best-performing model.</p>

Skills

Python SQL Java Pandas NumPy Scikit-learn Matplotlib Data Analysis Machine Learning Exploratory Data Analysis Feature Engineering Predictive Modeling Data Visualization Node.js Express EJS SQLite RESTful APIs CRUD User Authentication Session Management Middleware Server-side Rendering Classification Algorithms Logistic Regression Decision Tree Random Forest Accuracy Precision Recall F1-score
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