Open to opportunities

Dávid Katona

@dvidkatona

Message

I build scalable full-stack platforms, from real-time auction systems to complex back-office products.

Hungary

Message

What I'm looking for

I'm looking to build and improve complex, scalable software products where I can contribute across backend architecture, modern frontend development, real-time systems, and maintainable delivery practices.

I've spent 12+ years building complex backend systems and modern frontend applications, most recently delivering full-stack digital management platforms as a freelancer.

For a tender-auction management platform, I handle requirements analysis, database design, REST APIs, auction-engine logic, and real-time notifications using React, Next.js, FastAPI, WebSockets, Docker, and CI/CD.

I've also built a darts club back-office ecosystem with membership, competition, financial, and live-results capabilities, managing the development independently from staging through production.

At Docmet Systems, I worked on kart-racing management software, an international online casino back-office migration to React, and Ingatlan.com integrations. I build maintainable, scalable code through Clean Code, SOLID, TDD, and Agile practices.

Experience

Work history, roles, and key accomplishments

Current

Freelancer Szoftverfejlesztő

Current

Freelancer

Oct 2025 - Present (11 months)

Full-stack development of a tender-auction management platform and a sports club digital management platform, including requirements analysis, database design, REST API development, and real-time notification systems.

React Next.js TypeScript Python fastAPI SQLAlchemy Alembic Docker GitHub Actions Express MySQL Sequelize

Szoftverfejlesztő

Docmet Systems Kft.

Jun 2018 - Oct 2025 (7 years 4 months)

Developed a custom inventory and balance management system for racing teams, and migrated a legacy Flask-Admin interface to a modern React architecture for an international online casino backoffice and reporting system.