Senior Java Backend Developer

Hi, I'm Dominik Breu

Building distributed systems, IoT platforms, and resilient backend services.

I focus on real-time data processing, event-driven architecture, and observability for systems that need to perform reliably in production.

10+ Years building production software
Focus Java, Kafka Streams, IoT, and cloud-native delivery
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Profile

About Me

Senior Java Backend Developer with 10+ years of experience building distributed systems, IoT platforms, and enterprise-grade backend services.

I specialize in the Java ecosystem, event-driven architectures, and real-time data processing. My recent work has focused on IoT platforms, Kafka Streams, observability, and operating high-throughput systems in production environments, while Spring Boot remains a core part of my long-term consulting and delivery work.

At a glance
10+ Years of experience
Real-time Streaming and event-driven systems
Multi-tenant Platform architecture and integration experience
End-to-end Architecture, delivery, and observability
Core Technologies
Java Quarkus Spring Boot Kafka Streams Kafka Connect MQTT OpenTelemetry Elastic APM Prometheus Grafana Docker Swarm Kubernetes PostgreSQL Apache APISIX
Career Path

Experience

09/2021 - Present

Senior Software Developer

Consulting and product delivery in enterprise and IoT environments

Building distributed backend systems with Kafka Streams, observability pipelines, API gateway migrations, and production-ready containerized services for demanding environments.

09/2019 - 09/2021

Professional Software Developer

Consulting across enterprise modernization projects

Built microservice platforms with Spring Boot and Kotlin services, Kafka-based integration, and Kubernetes deployments on Azure. Spring Boot has also remained a constant across consulting work since the early 2010s.

04/2018 - 08/2019

Mobile App Developer

Product-focused mobile commerce environment

Worked on Android and iOS commerce apps, continuous delivery workflows, and coordination with external development partners.

01/2016 - 03/2018

IT Consultant / Junior IT Consultant

Consulting environment for client delivery

Developed native Android applications with Java backend integrations, REST communication, and early continuous delivery pipelines across client projects.

Selected Work

Featured Projects

Microservice Modernization
Platform Modernization

Microservice Modernization

Modernized backend services and integration flows with Spring Boot, Kotlin, and event-driven patterns for teams moving away from heavier legacy platforms.

Spring Boot Kotlin Kafka
Mobile Commerce Apps
Mobile + Backend

Mobile Commerce Apps

Built and evolved native mobile commerce experiences with backend integrations, release workflows, and a strong focus on dependable delivery.

Android iOS Spring Boot
Let’s Talk

Get In Touch

I’m always interested in hearing about new projects, backend challenges, and teams that need dependable engineering.

Best fit

Projects involving Java, distributed systems, platform modernization, or pragmatic technical leadership.

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