Synapse – A cognitive knowledge system, local-first
A self-built system with technical depth: event sourcing, graph cache, local LLMs and a brain-region-based agent model – fully offline, no cloud.
Senior Web Engineer with an AI focus
From the web frontend to the local AI model stack.
SelectedWork
Case studies and recent write-ups from practice.
datasohub – AI-assisted content production in production
From research to a published post in about 7 minutes: a two-model pipeline – Gemini 3 Pro writes, Nano Banana illustrates – with a generative blog system and a data-driven frontend.
Claude CLI, OpenCode & Gemini – route models, pick a harness
Three coding CLIs, one workflow – but the routing axis is the models, not the tools. How I pick the model first – Claude Opus 5 vs. Sonnet 5, Gemini 3.1 Pro with its 2M context, Gemini 3 Flash for vision, the open DeepSeek-V4-Pro, a local Qwen3-32B (IQ3_M) – and then the right harness. With shell setup and a small router script.
References
Projects I shipped as project manager and developer.
zeitgeber-app.vercel.app
Zeitgeber
Astronomically accurate clock — solar time instead of timezone, plus social jetlag via the Munich Chronotype Questionnaire.
Synapse
Jobschleuse
Jobschleuse
Find, enrich and turn job listings into finished applications — local LLM pipeline instead of SaaS.
commodity-board.com
commodity-board.com
Front-end design and implementation. React Router 7, Tailwind CSS, API-first architecture.
dataso.de/blog
dataso Hub
CRM with security scans via API + web crawling and AI-assisted content generation.
firian.com
asseko.ai
wohlfühlgesundheit.de
Wohlfühlgesundheit
Astro website for holistic gut therapy. Zoom booking system, 10-step intake questionnaire, PHP backend, GDPR-compliant cookie management.
Leitstand
pxlngn.net
oxg.de
baukultur-bw.de
Baukultur Baden-Württemberg
TYPO3 platform for architecture and building culture. Hybrid between waterfall and Scrum.
kuk.de
tkscable.com
TKS Cable
TYPO3 for cable and network technology. Continuous Kanban workflow.
zuhauseplus.vodafone.de
Vodafone Zuhause Plus
Static site generator instead of TYPO3. Front-end development with Scrum – fast iteration, high code quality.
MyCareer
dataso GmbH
Full-Stack Developer
2026–present
- Build AI-powered web applications – from idea to deployment
- Integrate intelligent algorithms into production and administrative processes: detect data patterns, automate routine tasks
- Build platforms, customer portals and internal tools that map processes precisely
- Modernize legacy software: deliver cloud migration securely, scalably and GDPR-compliant
- Replace Excel-based processes with intelligent applications
Parental leave & job search
2025–2026
ion2s GmbH
Project Manager / Scrum Master
2016–2025
- Lead TYPO3 enterprise projects: OXG Glasfaser, Baukultur BW, TKS Cable – hybrid between agile and classic
- Coach Scrum teams, set up and keep agile processes running with JIRA/Confluence
- Servant leadership – foster self-organized teams, improve continuously
- Incident and release management, keep stakeholders informed
- Testing – manual tests, browserstack, document bugs systematically
ion2s GmbH
Front-End Developer
2012–2016
- Build web interfaces with AngularJS, SCSS, Node.js and npm
- Legacy migration: Kabel Deutschland to Vodafone Zuhause Plus – static site generators, performance optimization, modern frontend architecture
- TYPO3 enterprise: tune performance, implement responsive design, improve UX
- Code reviews, integrate CI/CD with Jenkins
- Cross-functional: bring design, front-end and back-end together
Intercontact
Werbegesellschaft mbH
Full-Stack Web Developer
2010–2012
- Full-stack: HTML, CSS, JavaScript, PHP – plus Photoshop & Illustrator for web and print
- Administer Apache web servers and hosting infrastructure
- Maintain CMS systems and provide technical support
- Implement marketing campaigns, technically and creatively
- Advise on UX and performance optimizations
PREUSS
MEDIENSERVICE e.K.
Media Designer
2003–2009
- Web design and programming – the early days
- Design print media and prepare it for print
- Develop creative concepts for advertising material
- Own the complete prepress stage
Certified ScrumMaster®
Scrum Alliance
Issued: Apr 2021 · Valid until: Apr 2025
Certificate ID: 001189726
History
Over 20 years, from web dev through Scrum Master to team lead. Built projects, led teams, wrote code.
Frontend Development
Since 2000: from HTML tables to modern JavaScript. Responsive design since the early Bootstrap days. Accessibility and performance always in focus.
Project Management
From small WordPress sites to large enterprise projects. Learned and refined budgets, timelines and stakeholder management.
Team Leadership & Scrum
Built and led teams. Took on the Scrum Master role. Established sprint planning, retrospectives, daily standups.
Legacy Systems
Took over, analyzed and cleaned up old codebases. Modernized step by step. Continuous improvement instead of big-bang rewrites.
Reverse Engineering
Analyzed and understood foreign code without documentation. Reconstructed APIs through network analysis. Dissected legacy systems via debugging.
Quality Assurance
Manual tests, later automated. Introduced bug-tracking systems. Built and improved testing processes.
CI/CD & Monitoring
Built Jenkins pipelines. Automated deployments. Integrated monitoring tools. Established performance metrics.
Documentation
Maintained wikis, structured Confluence spaces. Organized knowledge transfer. Documented onboarding processes.
Process Improvement
Optimized workflows, identified bottlenecks. Improved communication within the team. Lived continuous improvement.
AI Integration & LLM Development
Built and shipped AI-powered applications with backend integration. Solid knowledge of LLM integration: context management, memory strategies, guardrails and prompt design. Established the Claude CLI as a productive development environment. Focus on pragmatic, maintainable AI solutions.
My personality profile based on the Big Five (OCEAN) model.
Offenheit
Sehr hoch4,5/ 5
Sehr kreativ, neugierig und offen für neue Erfahrungen
Gewissenhaftigkeit
Mittel3,0/ 5
Ausgewogener Mix aus Flexibilität und Struktur
Extraversion
Sehr hoch4,5/ 5
Gesellig, energiegeladen, baut leicht Kontakte auf
Verträglichkeit
Hoch4,0/ 5
Empathisch, kooperativ, teamorientiert
Emotionale Stabilität
Mittel-hoch3,5/ 5
Relativ ausgeglichen, aber nicht völlig unerschütterlich
AI Experiments
Own systems, local models, agentic tools.
Claude Code / OpenCode
Agentic development in daily practice — my own workflows, straight from the terminal.
Hermes
Event-driven orchestration — receive signals and route them automatically to the right processing steps.
Local LLMs
Ollama, Qwen3, bge-m3 on an RX 6900 XT. Data sovereignty instead of forced cloud.
MCP
Model Context Protocol — connect tools and data sources to models.
Context Engineering
Get the right context into the model at the right time — instead of naive vector search.
Agents
Autonomous agents that plan multi-step tasks, use tools and verify their own results.
Own Benchmarks
Measure models on real example tasks — quality, speed and resource needs instead of marketing numbers.
InvokeAI & VLMs
Image generation with InvokeAI (Stable Diffusion) and vision-language models for image analysis — from text-to-image to image understanding.
Software Stack
What I most enjoy working with right now.
TypeScriptJavaScriptPythonAstroReactReact Router 7Node.jsTailwind CSS
Docker
Linux
Scrum, Kanban, Waterfall – whatever fits.
Scrum
Kanban
WaterfallWhat I work with every day.
Visual Studio CodeClaude CLI
OpenCode CLI
GitHub
VercelCloudflare
