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Freelancer

Summary

With over 15 years of experience as a Senior Developer, I have developed a strong expertise in development and system administration, particularly in backend systems. My skill set includes software architecture, software and database development, operations, and quality assurance. Over the past 8 years, I have honed my leadership and project management skills. I am passionate about emerging technologies and excel at integrating them into client projects. My primary goal is to deliver solutions on time and within budget. I have successfully collaborated with esteemed clients such as Project A, Rocket Internet, ABOUT YOU, Axel Springer SE, kfzteile24, innogy, and Zalando.

I have over a decade of experience designing, building, and scaling software platforms across e-commerce, energy, and SaaS industries. As Lead Software Architect at Innogy SE, I drove the development of the “bliss” app from concept to deployment in just five months, managed cross-functional teams, and optimized infrastructure to cut deployment time by half. At Zalando SE, I redefined and rebuilt the returns process, delivering a scalable Kotlin/Java application that improved efficiency and customer experience. Previously, I led engineering at Zimmerli of Switzerland, boosting store performance by 30% and user engagement by 15%, while planning roadmaps and managing international teams. My roles at Travojo, tausendkind, blogfoster, About You, Project A Ventures, Rocket Internet, and Axel Springer further strengthened my expertise in backend and frontend development, system architecture, cloud infrastructure, and platform scalability, with hands-on use of technologies such as Java, Kotlin, Node.js, React, Kubernetes, AWS, Azure, and Postgres.

Skills

Programming

  • Java
  • Javascript
  • Typescript
  • Spring Boot
  • Javaee
  • Jpa
  • React
  • Nextjs
  • Node.js
  • Tailwind
  • Kafka
  • Camunda Bpmn
  • N8n

Ai & Llm

  • Chatgpt
  • Ollama
  • Mcp
  • N8n
  • Claude
  • Mistral

Architecture

  • Microservices
  • Soap
  • Json
  • Rest
  • Or-mapping

Methodologies

  • Scrum
  • Kanban
  • Lean Software Development
  • Atlassia Jira
  • Confluence

Infrastructure

  • Docker
  • Kubernetes
  • Openshift
  • Aws S3
  • Aws Rds
  • Aws Cognito
  • Aws Kms
  • Aws Eks
  • Aws Ecs
  • Aws Elb
  • Aws Sns
  • Traefik
  • Authentik
  • Authelia
  • Oidc
  • Saml

Qa Testing

  • Playwrite
  • Selenium
  • Junit
  • Jest

Databases

  • Postgresql
  • Mysql
  • Mariadb
  • Mongodb
  • Redis
  • Elasticsearch
  • Opensearch
  • Neo4j
  • Qdrant

Languages

English
Advanced
German
Intermediate

Education

Oct 2004 - Jun 2008

Hochschule Stralsund

Informatics · Stralsund, Germany

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