Hey, I am a software engineer, an expert in payment systems, and a family man.
I work on George, digital banking of Erste Group, and love teaching developers online.
Looking for React mentorship?
Here is what my training program includes:
✓
Learning Clean Architecture in React
✓
Mastering testing React/Nextjs apps
✓
Making TDD your development tool
Start here
Let's check if you're eligible to become my mentee
What students are saying about my mentoring program
I worked with many wonderful companies all around the world
Projects
✓
We ship 2 enterprise-grade React apps
✓
300+ features crafted using 2m+ LOCs
✓
Software I ship handles ±330,548 payments every day
✓
It's 4.6 payments per second
(
0
since you entered the page)
Trainings
Mentoring program, workshops, bite-size lessons
26,000+ students (software engineers)
Subjects we master together:
✓
Clean Architecture in React
✓
Building React/Nextjs apps using TDD
✓
The Pyramid testing strategy
✓
Zero bugs policy for React apps
Personal life
I'm married to Janita. Together we have 2 kids.
Janita Sumeiko · Photo by Sonya Khegay
Need help? Send me an email to ….
Copyright © 2012 - 2025
Vienna, Austria.
All rights reserved.