Laszlo Feher

Data Science Portfolio

Hi I'm Laszlo, and I'm a Data Scientist. My portfolio focuses on interesting projects I've recently undertaken, with a strong emphasis on business impact. Please visit my Github & LinkedIn pages (or download my Resume) by using the links below!

14 minute read

Python Pandas CRM Customer Analytics E-commerce Repeat Customers

Turning One-Time Buyers Into Returning Customers Using Product Journey Analysis

In optical e-commerce, roughly 65% of buyers never come back. This project identifies what separates one-time buyers from repeat cus...

3 minute read

Python LLM Metric Registry Semantic layer + Planner Architecture

Mini SQL Query Engine — Natural Language Analytics with Local LLM

Overview This project is a locally-run natural language analytics system that lets non-technical users query business data in plain...

8 minute read

AI-augmented reasoning engine LLM Python Llama

Causal Revenue Analytics Engine - Period-over-Period Analysis

In this project I built an automated causal revenue analytics system that compares two time periods to identify why revenue changed,...

38 minute read

Deep Learning CNN Computer Vision Python

Face Recognition Using A Convolutional Neural Network

In this project I delved into the field of Computer Vision. I built & optimized a Convolutional Neural Network to classify image...

6 minute read

Demand Forecast SARIMA Time Series Exponential Smoothing LSTM Python

Demand Forecast of Retail Products Using ARIMA Method

In this comprehensive analysis, I embarked on a journey to enhance the inventory management and sales strategy of eOptika, a Europea...

11 minute read

Chi-Square Test Log-Linear Model Python AB Testing

Assessing Campaign Performance in Reminding Bank Clients of Due Installment Payments

In this project I evaluated a campaign performance among bank clients who received reminders using control groups. The applied techn...

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