Hey, I'm István — a freelance Software Engineer with 5+ years of experience in test automation, web & mobile development, and AI-driven solutions. Founder of QAVLAR.tech.
Why choose me
Committed to delivering high-quality, scalable, and secure solutions on time and within budget — no surprises, no jargon.
5+ years across industries — from fixing 1,000+ failing enterprise tests and halving execution time, to production mobile apps and AI-driven workflows.
I take the time to understand your goals and challenges, tailoring every solution to your specific needs — and I stay available after launch.
What I offer
From WordPress sites to cross-platform Android & iOS apps — fast, scalable, secure solutions with API integrations that work in production.
Manual or automated — I find bugs before your users do. One client's test suite went from 17 hours to 8.
Integrating Generative AI and building custom automation pipelines for marketing, content, workflows, and customer interaction.
Stuck on a technical decision? Vendor-neutral advice, code reviews, system diagnostics, and emergency debugging.
Windows, macOS, Linux, Raspberry Pi, or Home Assistant — no glitch is too niche. Smart home automation for IoT environments too.
I love a challenge. If your problem doesn't fit neatly into a category, reach out — chances are I've solved something similar before.
Let's talkSelected work
A full mobile application built from concept to App Store / Play Store deployment — user-friendly, scalable, built with the latest cross-platform technologies.
A brand-forward website built for speed and lead generation — optimised UX, fast load times, and an inquiry pipeline that converts visitors into customers.
Programmed a LEGO Mindstorms EV3 robot to autonomously play football using Python — real-time sensor control, pathfinding logic, and embedded programming.
How to work with me
Full-team delivery
End-to-end AI integration and software development. A full team, scalable processes, and production-grade solutions — from e-commerce to AI agents.
Capabilities
Individual engineering & advisory
Same expertise, direct access. Ideal when you need me personally — for freelance engineering, AI implementation, emergency debugging, code reviews, or technical advisory.
Capabilities
The person behind the work
Hey. I'm István — a passionate freelance software developer creating innovative digital solutions that solve real-world problems and inspire growth.
Whether you need a stunning website, a custom app, or a seamless automation script, I bring creativity, technical expertise, and a client-focused approach to every project.
Born in Budapest, based in Saarbrücken — I combine Hungarian creativity with a dedication to precision and reliability that clients in the DACH region expect.
Technology should solve real problems — not chase unnecessary complexity.
Every project is an opportunity to refine and optimise systems over time.
Regular updates, no jargon, no surprises — you know what's happening at every stage.
Every system exists to help users. I build with human factors front and center.
Freelance · Germany
XRoadMedia GmbH · Austria
Rubin Informatika · Hungary
CAE Healthcare · Hungary
University of Pannonia, Hungary
Thesis: Dashboard for monitoring an automatic distributed system. Also programmed a LEGO EV3 robot to play football in Python.
Cisco · via University of Pannonia
Programming
Web
Databases
Testing
DevOps & Tools
AI & Smart Home
Let's talk
Do you have a project, an idea or a question? Contact me — I respond within 24 hours.