// Data_Analytics_Portfolio

Periklis
Andrianos

Business Intelligence Intern
Retail Gaming Expert Software technician

Applied Mathematics foundation meets business intuition. Turning raw data into actionable insights using SQL, Tableau and Python. Focused on data storytelling, business impact, and real-world analytics projects.

Periklis Andrianos
12+
years in Retail Experience
6+1
Projects
BSc
Applied Mathematics
IT
Professional Diploma

From numbers
to insights

I am a Business Intelligence Intern and a Junior Data Analyst with a solid foundation in Applied Mathematics and practical expertise in SQL, Python, and Power BI. I combine analytical rigor with business experience gained through years in the retail gaming industry.

Currently pursuing a professional diploma as a Software Technician to bridge the gap between data analysis and technical implementation, enabling me to not just find insights, but build the pipelines and tools around them.

My entrepreneurial background means I always think about what the business impact actually is and not just what the data says but what to do about it.

Present
Business Intelligence Intern | Dialectica
Piraeus, Attica
2024-2026
Software Engineering Student
Vocational Training Center — Piraeus
2012-2026
Math Tutor | Self-employed
Salamina, Attica
2013-2025
Business Manager | Allwyn Agency
Salamina, Attica
2012-2021
Math Teacher | SPOUDASTIRIO M.E.
Salamina, Attica
2005-2012
Applied Mathematics
University of Crete — Greece

Skills, tools & certifications

The technologies and methodologies I use to turn raw data into business value.

Tools
Python75%
SQL (Postgre)80%
Power BI65%
MS Excel85%
Tableau60%
Skills
Pandas / NumPy80%
Joins / CTEs / Views70%
Matplotlib / Seaborn65%
Pivot Tables / Charts / Dashboards90%
Business Intelligence80%
Certifications
IBM Data Analyst Professional Certificate Coursera / View Credential
PCEP | Certified Entry-Level Python Programmer Python Institute / View Credential
SQL Intermediate HackerRank / View Credential

Featured Projects

End-to-end data projects from analysis to visualization — all available on GitHub.

OPAP Store Analysis

Excel · Python · Power BI

Betting Store Analysis & Insights

Combining 12 years of experience as an OPAP agency owner I extract real data and created an end-to-end pipeline that answers critical business questions. Led an EDA to evaluate a 2.62% decline in commission rates over five years.

Pandas Matplotlib DAX
View on GitHub →
SQL E-commerce Analysis

SQL · Data Engineering

E-commerce RDB for Stakeholders

Designed a RDB using MySQL to ETL synthetic data, using JOINS, CTEs and VIEWS to support business reporting and decision-making for 5 different stakeholder roles.

MySQL CTEs Views
View on GitHub →
CSV to SQL Importer

C# · .NET 8 Console App

High-Performance C# ETL Data Importer

A lightweight, production-ready ETL utility built in C# utilizing .NET 8. Automated process of importing large-scale datasets from flat CSV files into a structured MSS database using high-performance streaming techniques.

SqlBulkCopy TRUNCate TABLE CsvHelper
View on GitHub →
Python Stock Market Simulator

Python · Data · Visualization

Stock Market Simulator

A Stock Market Simulator with a custom GUI and live portfolio monitoring. Inspired by and expanded from advanced logic concepts during Stanford's Code in Place program.

Data Logging Tkinter Matplotlib
View on GitHub →
Excel E-Commerce Dashboard

MS Excel · EDA · Dashboard

E-Commerce Dashboard

Interactive Excel dashboard with pivot tables, dynamic charts, and slicers to explore e-commerce KPIs at a glance.

Excel Pivot Tables Slicers
View on GitHub →
R Project

R · Analytics

Sales Data Analysis in R

This project analyzes sales data for 3 products over time. The goal is to clean the dataset, handle missing values, and extract key business insights using R.

R dplyr ggplot2
View on GitHub →
Sports Analytics Thesis Thesis

Research · Big Data

The Big Data Revolution in Football & Basketball

A comprehensive academic literature review examining the transition from empirical coaching to data-driven decision-making. Deep dive into Optical Tracking (Computer Vision), Wearables (IoT), advanced metrics (xG, xA, Net Ratings, TS%), and real-world case studies (Liverpool FC, Brentford, NBA).

Big Data Sports Analytics BI Frameworks

Let's connect

Open to collaborations, data projects, and opportunities in analytics or software development.