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Aivalio/README.md

Hi, I'm Nikos 👋

Computer Science student at DIT NKUA, passionate about backend systems, clean architecture, and automation.

LinkedIn Email



🛠️ Core Tech Stack

🚀 Featured Projects

💰 Advanced Expense Tracker (Under Construction)

Production-grade full-stack backend architecture for expense tracking. Built with clean architecture principles, service layer pattern, and strict typing.

Stack: Python FastAPI PostgreSQL SQLAlchemy 2.0 Alembic Docker pytest 📦 Source

✈️ Flight Search App

Flask + MySQL web app exposing 5 analytical queries over an airline database (8 tables). Includes admin authentication, complex multi-table joins, and unit tests.

Stack: Python Flask SQLAlchemy MySQL pytest 🔗 Live Demo · 📦 Source

✅ To-Do App

Multi-user task manager with bcrypt authentication and per-user data isolation enforced at the service layer. 38 unit tests with in-memory SQLite.

Stack: Python Streamlit PostgreSQL SQLAlchemy pytest 🔗 Live Demo · 📦 Source

🌤️ Weather Dashboard

Streamlit weather dashboard consuming the OpenWeatherMap API with clean OOP architecture, caching, and error handling. 13 unit tests with mocked HTTP calls.

Stack: Python Streamlit Plotly REST API pytest 🔗 Live Demo · 📦 Source

📝 Task CLI

Pure-Python CLI task manager using only the standard library. 33 unit tests and GitHub Actions CI across Python 3.10–3.12.

Stack: Python argparse pytest GitHub Actions 📦 Source

🧠 Software Engineering Playbook

A comprehensive methodology and playbook for building production-ready software projects from scratch to deployment, covering modern architectures, Git workflows, and CI/CD.

Stack: Software Engineering Git Workflows CI/CD Architecture Best Practices 🔗 Live Demo · 📦 Source

🛠️ Tech Stack Detailed Breakdown

Languages & Frameworks

Python FastAPI Flask Streamlit

Databases & Tools

PostgreSQL MySQL SQLAlchemy Docker

Testing & CI/CD

pytest Git GitHub Actions

📊 GitHub Stats & Overview

GitHub Streak

Followers Stars Python

📫 Let's Connect

Always learning. Always building.

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  1. expense-tracker expense-tracker Public

    Python

  2. mysql-web-app mysql-web-app Public

    ✈️ Flask + MySQL flight search app with SQLAlchemy, multi-table joins, admin auth and 14 unit tests.

    Python 1

  3. todo-app todo-app Public

    ✅ Multi-user To-Do app with Streamlit, PostgreSQL, SQLAlchemy and bcrypt auth.

    Python

  4. task-cli task-cli Public

    📝 A simple CLI task manager in Python. Pure stdlib, 33 tests, GitHub Actions CI.

    Python

  5. weather_dashboard weather_dashboard Public

    Streamlit weather dashboard with OOP, Plotly charts, unit tests and live demo.

    Python

  6. software-engineering-playbook software-engineering-playbook Public

    A complete Engineering methodology & Playbook for building production-ready Software Projects from scratch to deployment.