About
01.About
I build and ship fullstack products — features, refactors, and embedded delivery across the entire stack. From React/Next.js frontends to Python/FastAPI backends, PostgreSQL databases, and AWS/Docker infrastructure. Clean architecture, no unnecessary abstractions, focused on systems that scale.
I've built LLM-powered features, RAG pipelines, and custom agentic systems — backed by an M.Sc. in Machine Learning from the University of Tübingen. This includes production work with OpenCLAW infrastructure, structural analysis systems, and the CAPS framework (Claude Automated Programming System).
For early-stage products, I set up entire stacks: frontend, API, database, CI/CD, deployment, monitoring. I've also worked fractionally as tech lead and architect — system design, architectural decisions, code reviews, async technical leadership. Projects span enterprise platform migrations (€1.2M/year savings), computer vision pipelines (90%+ clinical accuracy), and multi-agent orchestration platforms.
Technologies I work with daily:
- ▹Python
- ▹TypeScript
- ▹React
- ▹Next.js
- ▹FastAPI
- ▹PostgreSQL
- ▹Docker
- ▹AWS
Currently available for contract work — ~25h/week, remote.
Projects
02.Projects
A selection of my work spanning enterprise platform migrations, AI systems, and production infrastructure — from reverse-engineering Palantir Foundry to building self-hosted platforms and computer vision pipelines.
Enterprise Platform Migration
Decommissioned €100k/month Palantir Foundry enterprise platform and migrated 9.5 TB of production data with 8,435 resources to self-hosted infrastructure at €200/month — zero downtime, complete functionality preserved, full operational platform delivered
Results:
- ✓ €1.2M/year saved: €100,000/month → €200/month (99.8% cost reduction)
- ✓ 9.5 TB migrated with zero data loss and zero downtime during live migration
- ✓ Reverse-engineered proprietary platform with no documented export API
- ✓ 362 pipelines and 204 repositories rebuilt on self-hosted stack
- ✓ 9 production services with automated deployment, monitoring, and backups
- ✓ ~10 developers deploy without SSH via sub-7-minute automated pipeline
Biomechanical Structure Analysis
Production-grade biomechanical posture analysis system combining computer vision pipeline (MediaPipe, BiRefNet) with multi-agent LLM analysis — deployed to clinical workflow processing 40+ patient assessments daily
Results:
- ✓ Assessment time: 30 minutes → 3 minutes (90% reduction)
- ✓ 90%+ accuracy in posture deviation detection vs expert coaches
- ✓ 100% GDPR compliance with privacy-preserving blur layers
- ✓ Multi-agent LLM pipeline with specialist agents for granular biomechanical analysis
- ✓ Non-linear LangGraph architecture with conditional routing based on detected deviations
- ✓ 150+ clinical assessments processed with zero pipeline failures
View Interactive Demo
OpenClaw Agents
19 dedicated Slack agents for distributed engineering team across 5 countries, each with persistent vector memory, GitHub activity context, and timezone-aware scheduled check-ins
Results:
- ✓ 19 dedicated Slack agents with persistent memory across 5-country distributed team
- ✓ Manager agent auto-detects bottlenecks and reports team status
- ✓ Rich automation: Zoom transcripts, persistent tasks, fully custom cron jobs per developer
- ✓ Single-command provisioning for new agent deployment
- ✓ GitHub activity context integration for code-aware assistance
Customer Support Automation
Production-grade customer support automation combining n8n workflow orchestration, 6 specialized AI agents, and Palantir Foundry integration to deliver coach-level support with deep customer context and expert knowledge retrieval
Results:
- ✓ Zero AI hallucination incidents (hook system prevented configuration errors)
- ✓ Coach-level responses with customer biomechanics, training history, and expert knowledge
- ✓ Complete Slack-native helpdesk with live queues, voice replies, and automated media pipelines
- ✓ 13x growth in Action Handler implementation through supervised junior developer expansion
Testimonials
03.Testimonials
What people say about working with me on machine learning, data infrastructure, and software development projects.
“Working together with Johannes has been a great pleasure from day 1. Johannes is a great professional who does not only finds creative ways of solving problems, he's also a great communicator AND listener. I would highly recommend Johannes to anyone who's looking for a dedicated, AI-first and forward-thinking engineer!”
“Johannes was one of the most technically capable and reliable engineers I've worked with. What stood out wasn't just his skill, but his judgment — I found myself consulting him on architecture decisions, team situations, and engineering trade-offs well beyond his immediate scope. He has a rare ability to take on genuinely complex problems and return with solutions that are both elegant and practical. I'd work with him again without hesitation.”
Worked with me? Share your experience or get in touch if you're interested in working together.
Contact
04.Get In Touch
I'm currently available for software engineering projects, system architecture consulting, and AI integration opportunities. Whether you have a project in mind or just want to chat about tech, my inbox is always open.