Senior Java Backend Engineer · Available for Consulting
15+ years designing and delivering resilient Java backend systems for mission-critical environments. I work with teams on focused engagements — architecture reviews, microservices design, event-driven systems, and delivery quality improvements.
Oracle Certified Professional · Java SE 17 · Spring Certified Professional 2024
Architecture reviews
Microservices design, distributed systems assessment
Event-driven systems
RabbitMQ, Kafka, Redis — async processing and coordination
Delivery quality
Test automation, CI/CD, reducing manual effort
15+ certs
active certifications
Austria + India
cross-border delivery
Robot + Cypress
test automation
Since 2008
professional Java development
Selected work demonstrating backend design, system reliability, and engineering collaboration. Open each project for dedicated implementation and architecture details.
Side project
Production-grade portfolio with CI/CD, static analysis, security hardening and automated deployment verification.
Impact: Zero critical vulnerabilities via SonarCloud. Full engineering pipeline from day one.
Open project narrative
View project page →Master's Thesis — FH Hagenberg, 2015
Built a secure automated grading system for programming assignments in Moodle using isolated Oracle VirtualBox VMs per student.
Impact: Prototype of the same concept used today by HackerRank and LeetCode — built in 2015.
Open project narrative
View project page →Case study
Built backend modules for a distributed emergency-operations platform, enabling secure API access, resilient event-driven coordination, and low-latency shared state for time-critical workflows.
Impact: Improved reliability for operationally sensitive emergency workflows.
Open project narrative
View project page →The tools and platforms I rely on to deliver proven backend systems and efficient developer workflows.
Java is the foundation of my backend work—clean, stable, and performant services.
Modular, testable Spring Boot applications with security and metrics.
Resilient, decoupled services designed for evolution at scale.
Cache and distributed locking to reduce latency and improve throughput.
Event-driven systems and streaming pipelines for reliable async processing.
Infrastructure automation and resilient cloud deployments on OCI.
Thoughts on backend architecture, scaling systems, and practical engineering patterns.
Article preview
2026-04-15
In 2015 I used Oracle VirtualBox VMs to safely execute untrusted student code. Here is how the same architecture maps to Docker, Kubernetes, and modern container primitives.
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2026-04-10
How to expose VM lifecycle operations — clone, start, stop, execute — as REST endpoints using the Oracle VirtualBox SDK and Java.
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2026-04-08
A walkthrough of the four-layer architecture behind a Moodle plugin that safely compiles and executes student-submitted Java code on isolated virtual machines.
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Read more →I design resilient backend systems, distributed architectures, and high-throughput event-driven platforms.
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