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
Results:
- ✓ 99.8% cost reduction: €100,000/month → €200/month
- ✓ 9.5 TB migrated across 1,676 datasets with zero data loss
- ✓ 362 pipeline definitions captured, 204 repositories cloned with full Git history
- ✓ 6 production services running with zero downtime incidents over 6 months
- ✓ Zero non-idiomatic code merged to production after blocking hooks introduced
- ✓ Complete vendor de-risking from proprietary platform dependency
Self-Hosted Production Infrastructure
Git-driven deployment platform running ~10 production services for ~5 developers on a single Hetzner dedicated server — replacing enterprise SaaS with fully owned infrastructure featuring automated deployments, multi-service orchestration, and comprehensive backup strategy
Results:
- ✓ ~5 developers deploying without SSH access via automated pipeline
- ✓ 10 production services running with automatic SSL renewal
- ✓ Daily automated backups with local + off-site redundancy
- ✓ Complete infrastructure reproducible from single Git repository
- ✓ Zero manual deployment steps — sub-7-minute push-to-live cycle
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:
- ✓ 1 week framework setup → 2 months junior team expansion (13x growth in Action Handler)
- ✓ 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
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.