Websites that do more than look good.

I plan, design and build custom websites and online shops for companies, brands and sports organizations.

My standard: clear structures, thoughtful design and a technical build that fits each project.

Selected projects

  • Tennis Association Berlin-Brandenburg
  • Close Call Clothing
Home page of the Tennis Association Berlin-Brandenburg website

Selected projects.

Every project has different requirements. What matters is turning them into a digital solution that makes content easy to understand, fits the brand and works in everyday use.

Desktop view of the Tennis Association Berlin-Brandenburg website
Mobile view of the Tennis Association Berlin-Brandenburg website

Tennis Association Berlin-Brandenburg

Complex information. A clear digital presence.

For the Tennis Association Berlin-Brandenburg, I planned, designed and built the new web presence.

The particular challenge was to make a large amount of information clearly accessible to different audiences.

The focus was therefore on a rethought information architecture, clear navigation and a unified visual concept.

Thanks to my own background in competitive tennis, I could bring requirements and user perspectives directly into the development.

  • Concept
  • Information architecture
  • Web design
  • Responsive development
  • Technical implementation
Visit website →
Desktop view of the Close Call Clothing online shop
Mobile view of the Close Call Clothing online shop

Close Call Clothing

E-commerce meets brand identity.

For Close Call Clothing, I built an online shop that brings together products, brand identity and storytelling.

As a co-founder, I know not only the design and technical requirements but also the business perspective behind a digital business model.

The goal was a consistent brand world in which product presentation, design and shopping experience work together.

  • Concept
  • Web design
  • E-commerce
  • Brand presence
  • Technical implementation
Visit online shop →

From the first idea to the finished website.

I support digital projects from concept through design to technical implementation. Depending on the requirements, the result is a complete new web presence or the targeted further development of an existing solution.

Websites & Relaunch

Custom websites for companies, organizations and brands. Whether it is a new web presence or a comprehensive relaunch: the focus is on a clear structure, a suitable design and reliable technical implementation.

E-Commerce

Online shops that present products convincingly and make buying easy. I think about brand presence, product presentation, user guidance and technical implementation together.

Development & Support

A website is not finished at launch. I help with the further development of existing websites, the implementation of additional features and, if you wish, ongoing technical support.

A clear process. From start to launch.

Good digital solutions come from a clear understanding of the requirements and a structured collaboration. I guide projects personally and handle both the design and the technical implementation.

  1. Getting to know each other

    We talk about your project, the existing challenges and the goals you want to reach with your website.

  2. Concept & structure

    Based on our conversations, I develop a suitable site structure and the visual direction for your new web presence.

  3. Design & development

    The concept becomes a fully designed and technically implemented website that works reliably on different devices.

  4. Launch & support

    After joint review and a final check, the website goes live. If you wish, I also support you afterwards with further development.

Portrait of Jonas Pelle Hartenstein

Technical understanding meets a business perspective.

I am Jonas Pelle Hartenstein, a professional tennis player, entrepreneur and web developer.

Alongside my sports career, I have built my own companies and planned and delivered a variety of digital projects.

These experiences shape my work: I look at websites not only from a design or technical point of view, but also think about what role they should play for a company or an organization.

From the first idea to launch, I guide projects personally and take care of both the design and the technical implementation.

Discuss a project →

Frequently asked questions.

How much does a website cost?

The cost depends on scope, features and individual requirements. After an initial conversation, I can estimate the effort and prepare a concrete quote.

Can an existing website be reworked?

Yes. Depending on the technical foundation and requirements, an existing website can be optimized in a targeted way or rebuilt completely.

Can I edit content myself later?

If this is part of the project, I use a suitable content management system so you can maintain content on your own afterwards.

Do you also provide support after launch?

If you wish, I also help after publication with technical questions, adjustments and further development.

Planning a new website?

Whether it is a new web presence, a relaunch or an online shop: I look forward to learning more about your project.

Briefly describe your idea and the most important requirements. Afterwards, we can discuss together which approach makes sense.

Write to me directly:

hello@jonas-pelle-hartenstein.de

Briefly tell me your name, your company, your website and what it is about.

Request a project by email