Michal Kolaczewski

Eventful App
Android Application | Kotlin, AWS (Lambda, AppSync, RDS, Cognito), GraphQL, SQL

• Developed a location-based event discovery Android app using Kotlin and Jetpack Compose for the frontend.
• Designed and implemented backend infrastructure using AWS services:
• Created multiple AWS Lambda functions for full CRUD operations.
• Configured AWS AppSync with GraphQL for real-time frontend-backend data sync.
• Integrated AWS Cognito for authentication with post-confirmation triggers to populate RDS user profiles.
• Built a PostgreSQL database on AWS RDS to manage users, businesses, events, and favorites.
• Secured backend credentials using AWS Secrets Manager and enforced IAM roles for secure access.

AI Car Price Predictor
Python, Selenium, BeautifulSoup, Scikit-learn, SVR, Web Scraping

• Built a machine learning model to predict used car prices from web-scraped data.
• Created a custom dictionary for car features (make, model, mileage, etc.) to structure training data.
• Automated data collection using Selenium and BeautifulSoup from online car listing sites.
• Trained and evaluated a Support Vector Regression (SVR) model using Scikit-learn with optimized feature preprocessing.

• Data Structures
• Programming in Python
• Programming in C++
• Data Science
• Operating Systems
• Software Engineering
• Stats Using R
• Networking
• Databases
• Database Management in AWS
• AI/ Machine Learning