Hi, I'm Miłosz Jonak,
and I'm a Software Developer
About Me
- .NET Desktop Developer
- Built an ERP-like system for inventory, orders, projects, invoices, and vendors.
- .NET & React Native Developer
- Developed mobile apps for sales, scheduling, API integration, and data handling.
- Developed Exhibition Management System.
- Game bots
- Google review automation
- Vacation deal notifier
- Traveling
- Cycling
- Calisthenics
- Swimming
- Spending time with friends
Projects
EMS - Exhibition Management System
A web and server-based system for managing museum exhibitions and connected multimedia devices.
Key Features:
• Modular architecture built with Symfony (PHP) and React
• Device management integrated with a C#/.NET server application for real-time communication
• RESTful API endpoints for CRUD operations across all core modules
• Media and Playlist modules for uploading, organizing, and assigning media to exhibition devices
• Advanced scheduling system for procedures and exceptions, allowing precise task execution at defined times and days of the week
• PostgreSQL database with entity-based validation and migration system
My Contributions:
• Developed and extended server-side plugins in C#/.NET for device control and integration
• Designed and implemented new Media and Playlist modules in Symfony, including upload, pagination, and deletion endpoints
• Created database entities and migrations using Doctrine ORM
• Integrated EMS backend with external APIs
• Participated in designing and deploying new features across production environments
• Collaborated with frontend developers to align API response structures with React hooks (React Query, Axios)
• Installed and tested the entire system on various devices within production environments
Field Sales & CRM Mobile Apps
Mobile applications for field sales ambasadors, coordinators, and administrators, designed to streamline sales and customer management.
Key Features:
• CRM module for managing customer interactions and sales tracking
• Work hours tracking, visit scheduling, and task management
• Performance analytics and reporting for field sales representatives
• Real-time data synchronization with the backend API
• Local database integration with TypeORM and SQLite for efficient data storage
My Contributions:
• Developed and maintained custom npm packages in TypeScript for API communication, data handling, and much more
• Implemented models, containers, extensions, database management logic, and various utilities for seamless API interaction
• Optimized database interactions and query performance using TypeORM and SQL
• Collaborated on the backend by analyzing and enhancing PHP API logic to ensure stability and proper integration
• Assisted in frontend development and troubleshooting issues across the system
Warehouse Management App
A desktop application for managing warehouse operations, orders, products, projects, invoices, and vendors
Key Features:
• Full CRUD operations integrated with an SQL database for robust data handling
• Project import and visualization in an expandable tree structure
• Inventory tracking with real-time status of reserved, ordered and available components
• Optimized workflows for order processing and resource management
• User-friendly interface enhancing warehouse and supply chain efficiency
CarMinder Mobile App
A mobile app for managing vehicles and tracking maintenance, built with React Native
Key Features:
• Secure login and registration with email confirmation
• Manage vehicles by adding, editing, and deleting with data auto-fill from CarQuery API
• Upload and update vehicle photos
• Parking spot tracking with GPS integration
• Maintenance reminders and notifications
• Offline data caching with server synchronization for seamless data management
• Intuitive UI with smooth navigation
CarMinder API
An ASP.NET Core API enabling secure data management for the CarMinder mobile app
Key Features:
• Secure authentication system with JWT tokens and Microsoft Identity
• User account management including registration, login, email confirmation, and logout
• Managing vehicle data (add, edit, remove, and retrieve user vehicles)
• Secure communication between mobile app and backend with API endpoints
• Integration with Entity Framework Core for efficient database operations
• Email notifications using MailKit
• Comprehensive API documentation via Swagger (Swashbuckle)
Finance Tracker
A web application built with ASP.NET Core for managing personal finances
Key Features:
• Transaction categories management (add, edit, delete categories for better organization)
• Transactions management (add, edit, and delete financial transactions)
• Dashboard overview with real-time financial insights
• Visual charts for expense distribution and income vs expense comparison
• Recent transactions table for quick access to financial activities
• Integrated currency converter with real-time exchange rates from the Currency Rates API
• Import and export functionality for easy data management and backup
Skills & Technologies
React Native
.NET
C#
TypeScript
SQLite
Python
ORMs
Bash
PHP
API
Linux (Ubuntu, Debian)
SQL
Git
Expo
Node.js
Rust
GitHub
React
C++
C
Jira
Postman
HTML5
CSS3
Contact Me
Let's connect! Feel free to reach out via email or social media.