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Impressum

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Mario Doppler.

Senior Full Stack Developer & Freelancer

I design and build production-grade systems — from microservices and event-driven backends on the JVM to modern frontends and Kubernetes infrastructure. Based in Austria, available remotely.

The name says it all: a dev who actually cares. I take end-to-end ownership of what I build — from the first line of code to production. No finger-pointing, no "that's not my ticket." If it's broken, I fix it. If it could be better, I say so.

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Tech Stack

Backend

JavaKotlinSpring BootSpring CloudSpring SecurityJVMKafkaMicroservices

Frontend

ReactAngularTypeScriptNext.js

Infrastructure

KubernetesDockerCI/CDArgoCDPrometheusGrafanaLokiOpenTelemetry
CKA CertifiedCKAD Certified

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What I do

Backend Development

Production-grade services on the JVM. Spring Boot, Spring Cloud, Kafka-driven event architectures, and well-sliced microservices designed for scale.

Frontend Development

Clean, modern UIs with React or Angular — TypeScript-first, component-driven, and fully integrated with your backend.

Kubernetes & Infrastructure

CKA & CKAD certified. Cluster setup, workload orchestration, GitOps pipelines, and container-first delivery workflows.

Architecture & Team Leadership

Microservice boundary design, system architecture, and hands-on team guidance. I help teams ship faster without accumulating technical debt.

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Let's work together

I'm available for freelance projects and short-to-mid-term engagements. Whether you need full-stack feature work, a microservices migration, or Kubernetes expertise — you'll get someone who sees it through, not someone who hands it off.

mario@devwhocares.at