Freelancer profile translated to English.

Description

Senior Software Engineer with over 20 years of experience in developing and operating scalable backend systems. Focus areas: Java (Spring Boot, JVM Internals), Kubernetes, Kafka, AWS/GCP, Clean Architecture, TDD and testing strategies.

I have productive experience with Agentic Coding (Claude Code, GitHub Copilot) – autonomous AI-assisted development, multi-file refactoring, and architecture design with AI assistance.

Remote-first, Berlin. Available immediately, 100%.

Industry field of expertise

Languages

German
Native or bilingual

Workplace preferences

Can work on-site

Berlin (up to 50km)

Münchener Hypothekenbank on order Steria Mummert Consulting AG
EAI Architect
May 2007 - July 2007 (2 months)
Munich, Germany
Tasks
• Analyzing of integration layer
• Develop and analyze requirements
• Market evaluation of possible products
• Production of criteria catalogue
JavaScript IT Architecture SQL
BWI FWAT
Lead Software Engineer / SW Architect
June 2024 - July 2025 (1 year and 1 month)
●
AI - AI integrated Software, Code Generation
●
Backend development (Java, microservices)
●
Build CI Pipeline (conceptual & scripting)
●
Architectural Design
●
BSI Basic Protection Documentation and Process Design
●
Microservices
●
Continuous Integration with Jenkins
●
Support build Gitlab Platform for AVS (Operations
/ Production Support)
●
Scripting: Bash, Python ●
Planning and Specification of Development Tasks
BE Development Lead
ID Management with Active Directory
Postgres
OAUTH2 (PKCE) Authentication and Resource
Protection
BSI IT Basic Protection Implementation + Documentation
Docker images development and maintaining
Technologies
● Java 21, 17, Jacoco, PiTest, Trivy various Linters
● Spring Boot (Jetty, Tomcat), JPA
● TLS, PKI, Certificate Revocation / OCSP ,
openSSL, certificate
● Docker, docker compose, podman, Kubernetes ..
● REST (JSON) Swagger / Open API, Soap (XML)
● Gitlab CI scripting
● Python
● OAuth2
● OpenLDAP, (ldap tools on bash)
● GitLab, SonarQube
● Azure, Kubernetes, Humaitec
● AlgoSec APIs
● Bash scripting (like smoke tests for ldap bind
flows, OAuth2 PCKE, docker file, gitlab ..)
● Git
● Java frameworks Spring MVC (REST), Spring-WS and
XPath for SOAP , Lombok ...
● Splunk, ELK Monitoring: Grafana, Micrometer
● Orga: Jira, Confluence
● Code analysis: SonarLint, Trivy, JacoCo
● Intellij, Pycharm
● Linux (Ubuntu ...)
● Gradle
● Cucumber, JUnit, Spring Boot Test
● JSON, HTTP, TLS, XML, YAML, XML, XPATH, XSLT
● Jetty, NGNX
● MCP, AI, LangChain, Geminin, Windsurf, CoPilot
Volkswagen CarNet China
Enterprise, Solution Architect
February 2015 - December 2015 (10 months)
Tasks
• Conception & Design of SOA & Software Architectures
• (Web) Application security
• Business analysis
• Web service development
• Mobile application & web/portal development
• Offshore team management & support
• Planning & project management support
• Load testing conception and leading non-functional testing
• Requirement management
• Contract specification
• Prototyping
• Security audit & concepts
• Gateway management
• Social network
• Telematics
• Coaching developers and software architects
• Code review