About Me

Full Stack Developer | Business Automation Specialist

Roysen

I am a full-stack software developer specializing in building practical business solutions. My experience covers mobile applications, web platforms, desktop systems, APIs, database architecture, and business process automation.

I focus on transforming manual business processes into reliable digital systems — POS platforms, inventory networks, hospitality operations, transport ticketing, and fiscal compliance integrations.

What sets my work apart is the combination of POS knowledge, business workflows, database design, and mobile + web + desktop development — closer to a software solutions engineer than a typical developer portfolio.

Core Expertise

Backend

Python, Django, ASP.NET MVC, REST APIs, SQL Server, PostgreSQL

Mobile

Android Java, Kotlin, Room, offline-first apps, mobile printing

Desktop

C# WPF, SQLite, Windows services, POS applications

Data

PostgreSQL, SQL Server, SQLite, schema design, synchronization

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