Freelancer profile translated to English.
Back to original languageAbout Dr. Michael
I was CTO and Principal Engineer. Today, I voluntarily build systems again that don't fail at 3 AM. So my clients can sleep soundly at night.
Underpinned by a PhD in Computer Science and years of experience in production systems, I combine theoretical depth with pragmatic implementation in real-world deployment.
My focus is on maintainable and distributed software architectures and modern AI integration (LLM connections, RAG pipelines, agent-based tooling).
I'm only satisfied when a feature is running productively in real-world use.
German
Native or bilingual
English
Fluent
Remote only
Primarily works remotely
Experience
- MicromerceSenior Software DeveloperOctober 2025 - April 2026 (6 months)
- Building and further developing a data lake for central processing, analysis, and long-term use of company data (improved data transparency and decision-making basis)
- Conception and implementation of an S3-based backup and archiving strategy (significantly increased data security while optimizing costs through lifecycle management)
- Development of a holistic deletion and retention concept (GDPR-compliant data storage, reduced risks, and clear data lifecycles)
- Targeted performance and cost optimizations (reduction of runtime, infrastructure costs, and system load while maintaining or improving stability)
- Analysis and sustainable resolution of production incidents and bottlenecks (increased system stability and availability)
- Building robust data processing and background processes for large data volumes (scalable and reliable processing)
- Improving monitoring, logging, and alerting (faster error detection and reduced downtime)
- Further development of deployment and quality processes (higher release security and more efficient development cycles
- Milia GmbHSenior Software DeveloperSOFTWARE PUBLISHINGDecember 2024 - September 2025 (9 months)Köln, Germany
- Design, implementation, and optimization of a full-text search based on OpenSearch (Elasticsearch), including the integration of business-specific boost rules
- Increasing platform scalability by (re-)implementing synchronous processes to replace asynchronous ones
- Analysis and resolution of business and technical errors in close collaboration with the Customer Success Team
- Various general improvements to the GitHub-based CI/CD pipeline
- Discussion, design, and implementation of business features
- Reducing support effort through analysis, design, implementation, and maintenance of an innovative system for replicating DATEV document status
- Improving the login rate of invited users through the design and implementation of an adaptive reminder system
- MicromerceSenior Software DeveloperSOFTWARE PUBLISHINGFebruary 2024 - August 2024 (6 months)
- Improved ticket processing time by connecting the ticketing system with the OpenAI API.
- Improved AI responses by setting up and configuring an RAG-based system.
- Reduced database costs in DynamoDB by over 30% through improvements to the company-specific persistence framework
- Enabled faster workflows for teams by introducing JavaScript support alongside Groovy for an internal scripting engine
- Increased productivity of Solution Engineers by developing a custom VSCode extension to support an internal configuration language with validation and auto-completion
- Improved platform stability by analyzing and resolving SQS performance issues
- Future-proofing the Infrastructure as Code setup by establishing CDK for AWS and migrating the existing codebase from an unsupported legacy solution
- Enhanced platform security by adding custom brute-force prevention
- Supporting teams in understanding the pros and cons of different architectural approaches
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Education
- Systemic Coach (SG)Systemic Institute Kassel2021Systemic Coach (SG)
- Dr. rer. nat., Computer ScienceUniversity of Kassel2012Dr. rer. nat., Computer Science
Certifications
- AWS Certified Solutions Architect - AssociateAWS2024
- HashiCorp Certified: Terraform Associate (003)Hashicorp2023