Available for new projects
Paul Koch, AI product engineer based in Munich
Websites that bring in enquiries.
Brand, website, ads and SEO from one source, for trades, practices and mid-sized companies across the DACH region. Fixed price, one contact, numbers you can check yourself.
Live and shipping
projects delivered for clients and own products
since 2021
organic Google clicks
Hofladen · 2 years
Brands behind my work
What I do
Services
From brand to measurable lead: all from one source, without agency overhead or handoff ping-pong between three different vendors.
- Very popular
AI Integration
Make your product usable by AI assistants.
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Brand
A presence people recognise.
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Website
Fast, clean, built to convert.
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Social & Search Ads
Advertising you can actually do the maths on.
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SEO
Get found without paying for every click.
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GEO
Visible where AI gives the answer.
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App Prototyping
From idea to clickable prototype in days.
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App Development
Software that holds up in daily use.
- All services Start a project
Featured Projects
All Projects
Ridian
Brand identity and website for a scheduling platform for teams and companies. From positioning and logo system through to the multilingual site.
GLOBE H₂ 3D World
Interactive 3D world of the hydrogen value chain for trade-fair kiosk and web. Model data cut by 76 percent, running at 70 to 120 frames per second.
Echo Fields Festival
Website and shop design plus Meta ads for an open-air festival near Freiburg. Two editions supported, from the design to the final-stretch campaign.
Kalender-Sync
Live SaaS for calendar synchronisation with over 3,000 users. Free/busy instead of event content, five providers, hosted in Germany. The product for individual users that the Ridian platform grew out of.
Success Stories
Projects in detail
How an idea turned into measurable results, with the real numbers behind it.
About
I'm a 23-year-old AI Product Engineer based in Munich. At The Bau Ventures, I build digital products at the intersection of AI, web, and business. My focus is on pragmatic solutions that create real value, from idea to launch.
Experience
AI Product Engineer
The Bau Ventures
Building AI-powered SaaS products and digital ventures.
Working Student Digital Solutions (Dual Study Program)
Drees & Sommer
Developing internal tools and digital solutions for construction and real estate as part of a dual study program.
Data Science Intern
Haufe Group
ML-driven recommendation engine for dynamic ad personalization.
Blog
Read moreKalender-Sync exits closed beta: 54 users, 38,000 events synced
Kalender-Sync is now live on a freemium plan. A look back at the closed-beta phase and what's next.
Kalender-Sync: Closed Beta Launched
Kalender-Sync enters closed beta. First users are syncing their calendars across Google, Outlook, and Apple.
What clients say
Paul set up and ran the campaign on his own initiative, so we didn't have to think about it. While we were busy with the build-up, the ads simply ran. That's exactly what we needed at that point.

Max
Organiser, Echo Fields Festival
From the first conversation to the finished result it moved quickly and pleasantly. At the fair we now walk visitors through our value chain visually instead of describing it. That sticks far better than any slide.

Julius Hasenzahl
CMO, GLOBE Fuel Cell Systems
Frequently asked questions
What clients want to know before the first call.
- What does a website cost?
- A company website typically lands between €3,000 and €6,000, a one-pager below that, a full brand presence above it. All ranges and cost drivers are on the pricing page. I work with fixed prices: after the intro call you get a price and a scope I stick to. If your budget doesn't match the plan, I'll say so in the first conversation, not in invoice number three.
- How long does a project take?
- A website is usually live in three to six weeks; a clickable app prototype in one to two. The biggest time factor is rarely the technology. It's content and sign-off on the client side, which is why the quote states exactly what I need from you and when.
- Do you work with small businesses?
- Yes, that's the core of my work. Electricians, farm shops, festivals, practices: clients for whom a big agency is too expensive and a page builder too shallow. You get agency-grade quality with a single point of contact instead of project managers, account managers, and intermediate invoices.
- What happens after launch?
- The site is yours, including access and source code. No hostage-taking. On request I take over ongoing support: updates, small changes, SEO monitoring, and reporting. If you'd rather handle it yourself, you get a walkthrough and documentation.
- Is my data, and my customers' data, safe?
- Data protection isn't an appendix here, it's part of how things are built: EU hosting and forms, cookie-free analytics where possible, encryption for sensitive data. One caveat: I implement this to the best of my knowledge but I don't provide legal advice. Have your privacy policy and data-processing agreements reviewed by a lawyer before you go live.
- Are ads even worth it for my business?
- Sometimes they're not, and then I'll say so. Ads work where there's a clear purchase decision, a good landing page, and clean tracking. At Echo Fields Festival, six days of Meta ads reached around ten percent of Freiburg's population at €0.17 per click. Without those conditions, the money is usually better spent on SEO or the site itself.
- How does working together actually work?
- Intro call, fixed-price quote, build with weekly previews, launch. We coordinate however suits you: phone, WhatsApp, or video call. You don't need to learn a project tool or speak jargon.
- You're in Munich. Do you work with clients elsewhere?
- Yes. I work with clients across German-speaking Europe, mostly remotely via phone, video calls, and shared previews. For kick-offs or on-site photo and video days, I travel by arrangement.
Start a project
Contact
Tell me briefly about your project. I'll get back to you within 24 hours with an honest assessment, free and without obligation.