Competitive athlete
Water polo up to the Bundesliga
Runner-up twice. That's where I learned what discipline, training and teamwork really mean.
Who I am
I started out as a developer and over the years grew into the place where technology and business meet. As lead developer at an international company, I led teams, owned architectures and worked on projects that won awards including the German Brand Award 2024. On top of that comes my focus on machine learning: I don't just build interfaces, I understand how data and AI genuinely make a product better.
In 2025 I founded GeminiHorizon because I believe businesses should get this quality without fighting their way through layers of agency. With me, you talk to the person who plans, designs and codes. What I promise, I deliver myself.
„I bring design, technology and sales together into one digital experience that wins customers.“
— Kristof Hulmann, founder of GeminiHorizon
K
Available for new projects
Kristof Hulmann
Senior Developer & Machine Learning Engineer · GeminiHorizon
LocationPiding, Berchtesgadener Land
Clients inGermany, Austria, Hungary, USA, Australia
LanguagesGerman, Hungarian, English, Portuguese
Response timeIn hours, not weeks
Point of contactAlways Kristof
Award-winning
I worked on a project that won the German Brand Award (Special) in 2024. Today I bring that standard of design and engineering to every project, whether it's a small website or complex software.
Background
Before founding GeminiHorizon, I spent many years as a developer and later lead developer at an international company. There I led teams, owned architectures and learned how to bring large projects cleanly over the finish line.
Today I bring that experience straight into your projects, from Piding for clients in Germany, Austria, Hungary, the USA and Australia.
23
Industries
2025
GeminiHorizon founded
1
Dedicated point of contact
∞
Focus on your goal
My path
Developer
Websites, shops and applications
The early years: projects for clients across a wide range of industries, with a focus on clean engineering.
Lead Developer
International company
Responsible for teams and architecture, contributed to award-winning projects (German Brand Award 2024 Special).
2025
GeminiHorizon
Founded my own studio in Piding in the Berchtesgadener Land, with clients in Germany and Austria.
May 2026
New markets
Launched in Hungary and the USA, projects as far as Australia and support in four languages.
Values
These principles shape how I plan, how I talk to you and how I deliver.
01
01
Precision
Every business gets exactly what it needs. Not less, but not more either just because it bills better.
02
02
Direct
No project manager, no game of telephone. You have one number, and the developer is on the other end.
03
03
Built to last
Clean code, well-thought-out architecture and technology that will still run three years from now.
A developer. Not just a designer.
I don't just build beautiful pages, I understand what happens underneath: from animation in the browser to backend and database all the way to the machine learning model. What matters is always the right tool for your goal, not the most expensive one.
Experience in the browser
Frontend & Animation
HTMLCSSJavaScriptTypeScriptTailwind CSSReactNext.jsthree.jsGSAP
Solid foundation
Backend & Data
PHP & LaravelNode.jsMySQLPostgreSQLSQLiteREST APIsWebhooks
Manage it yourself
CMS & Shops
KeystaticPayloadWordPressShopify
Data & AI
Machine Learning
Pythonscikit-learnLLMsData analysis
kristof@geminihorizon — stack.ts
// The difference to someone who "also does websites":
const kristof = {
can: ["React", "Next.js", "Laravel", "three.js", "Machine Learning"],
picks: "the right tool — not the most expensive one",
delivers: "systems that sell and work in everyday business"
}
export default kristof;
Websites & Shops
- Custom design
- Next.js & React
- Shops & CMS
- Multilingual websites
Software & Web Apps
- Web apps & portals
- Mobile apps
- Laravel & Node.js
- Integrations & automation
AI & Machine Learning
- Forecasting
- Churn prediction
- Recommendation systems
- AI assistants
Visibility
- Technical SEO
- Core Web Vitals
- Structured data
- Visibility in AI answers
„Design is where it starts. What really counts is whether the system behind it runs reliably, grows with you and brings your business customers.“
Industries
I work with businesses from 23 industries, from trades, hospitality and beauty to consulting and healthcare, all the way to events, film, photography, ERP and software. Agencies and developers also bring me in as a technical partner when a project needs more depth.
◈
Events
◎
Psychology & Coaching
⚙
Tuning & Automotive
◻
Construction & Trades
⚡
Electrical & Building Services
IT
IT & Software
</>
Web Apps
ERP
ERP Systems
HR
Recruitment
◉
Online Shops & E-Commerce
▣
Vehicle Wrapping
△
Architecture & Design
◇
Developers & Agencies
+
Wholesale & Logistics
♨
Restaurants & Hospitality
✿
Beauty Studios
✒
Tattoo Studios
✂
Barbershops & Hairdressers
◐
Photography
▢
Galleries & Art
▶
Film & Video
♡
Health & Care
◆
Translation & Services
✦
Other industries
What clients say.
How I work
01
Listen & understand
Before I write a single line, I understand your business, your bottlenecks and your goal. That takes a little time, but it saves iterations, misunderstandings and frustration.
02
A clear quote, no surprises
Before we start, you know exactly what you're getting: price, scope and timeline. No hidden items, no surprises later on.
03
Delivery with real progress
In my client portal you can see what's being built at any time and give feedback early. No disappearing behind the scenes for weeks.
04
Launch and what comes after
The work doesn't end at launch. I monitor, measure and adjust so your project still runs reliably a year from now.
Frequently asked questions
With me directly. There's no project manager between you and the developer. I listen to your plans, then plan, design and code everything myself, so nothing gets lost in translation.
Because I'm not just a web designer, I'm a senior developer and machine learning engineer. I was lead developer at an international company, worked on an award-winning project (German Brand Award 2024), and my clients demonstrably reach top rankings and get more enquiries.
That depends on the scope. After a short call you get a fixed quote with no hidden costs. And you get what your business needs, nothing more.
A website is usually ready within a few weeks, a ready-made website even within a few hours. I reply to messages in hours, not days.
Yes. I work in all four languages and have clients in Europe, the USA and Australia.