Business websites
Help customers understand what you offer and make the next step easy, on a phone or at a desk.
For example: a salon site with services, prices and a booking link.
Explore this serviceWeb & software development
I’m Adderlyn Windsor. I build websites, web apps and API integrations for businesses, independent professionals and private clients in German-speaking countries and internationally.
A 20-minute introduction

Services
A clear website for your customers or a tool for your team. The starting point is what you need to make your day easier.
Help customers understand what you offer and make the next step easy, on a phone or at a desk.
For example: a salon site with services, prices and a booking link.
Explore this serviceA tool for processes that have become too awkward to manage with spreadsheets, email and off-the-shelf software.
For example: a shared workspace where your team manages incoming enquiries.
Explore this serviceConnect the systems you already use and simplify repetitive tasks where it makes sense for your business.
For example: connecting appointment requests to an existing booking tool.
Explore this servicePortfolio
A look at the websites and web applications I’ve built, and the tasks they help people get done.
Holiday villas · Multilingual website
Two holiday villas, one multilingual website. Guests can compare the properties, explore the area and enquire about a stay directly.


Accommodation website · Redesign
I redesigned the archive for this property in Cologne-Junkersdorf in the style of the original website. The image shows the earlier archive.

Restaurant website · Menu
A restaurant site with an illustrated menu, ordering information and a language switcher. The screenshot shows the desktop layout.

English-language landing page
I built an English-language landing page for FuryDazzler. It introduces the programme and makes the video and FAQs easy to find.

macOS app · OpenVPN
A SwiftUI interface for user-supplied OpenVPN profiles via Tunnelblick. The connection shown in the demo is simulated.

Web application · API integration
Search by name or number and explore detail views powered by PokéAPI. A small local catalogue remains available if the API is down.

Web application · Gamification
A web app where everyday activities help a character progress. It’s in development; the image shows a demo with sample data.
Three different ways to combine colour, typography and imagery.

Graphite and bronze, understated serif type and a natural portrait.

Warm natural tones, clear headings and room for the architecture to stand out.

Bold red, clean type and a bowl of ramen as the focal point.
Costs & scope
A compact one-page site takes different work from a multilingual website with online booking. Before we start, you’ll get a proposal that separates the build from any ongoing costs.
Book an intro callAn idea of what you want to achieve is enough to get started. If you have an existing site, content or examples you like, we can look at them during the call.
How we work
We spend 20 minutes discussing what you need and whether I can help.
You receive a concrete proposal with the scope, costs and next steps.
I share a draft early and use your feedback to refine the result.
Once you approve the work, it goes live. I share the agreed access details and show you how to get started.
About me

I’ve been exploring software development for around 16 years. I began pursuing it professionally in 2018, first through training in front-end and full-stack development, then through professional work with Angular and SAP data integrations. I build my own web apps with Angular, Java and Spring Boot.
As part of a development team, I helped modernise a web interface used by healthcare professionals in their day-to-day work at Austrian hospitals.
Before we start
Tell me what the site or app needs to do for you. A link to your current site, a few examples or early content can help, but none of these is required.
Yes. We can look at whether targeted improvements are enough or a rebuild makes more sense. I take your existing content, domain and access into account when planning.
We agree on a timeframe after the intro call. It depends on the features you need and when content and feedback are ready.
If you need to make frequent changes, I can plan for a suitable editing tool. Alternatively, we can agree on which updates I handle for you.
Contact
Tell me a little about your idea. In the intro call, we can discuss what makes sense and how to get started.
Choose an available time for your introductory call.
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