k : ey software
k:ey software

Services

Custom Software Development — Web, Mobile & Desktop

Custom solutions for web, mobile, desktop and IT — carefully built, maintainable long-term, from one source.

Developed in Germany GDPR-compliant Fixed-price offers available

Websites & Web Apps

High-performance websites & web apps

We develop websites and web apps that do more than look good: fast load times, clear user journeys, technical SEO foundations and an architecture that stays maintainable over the long term. Whether company website, customer portal, CMS-based platform or custom B2B application — we connect design, frontend, backend and infrastructure so the result is not a short-term project, but a robust digital product.

  • UX concept, page structure and clear user journeys
  • Clean implementation with a maintainable codebase and scalable architecture
  • SEO-optimised websites with strong performance and good Core Web Vitals
  • Responsive and accessible web apps with careful quality assurance
Astro Next.js Vue.js TypeScript Tailwind CSS

Desktop Applications

Native software for Windows, macOS and Linux

We develop desktop applications when software needs to run reliably on local machines, work close to the operating system or remain usable without a permanent internet connection. Based on .NET and Avalonia, we build applications for Windows, macOS and Linux — including setup, update structure and a clean release process. Whether internal tool, business application or custom specialist software: the implementation follows the customer’s specific requirements and stays maintainable over the long term.

  • Cross-platform desktop apps for Windows, macOS and Linux
  • Offline-capable software for local processes and data
  • System-level features depending on application requirements
  • Setup, updates and release structure for production use
.NET Avalonia Windows macOS Linux

Shopware

E-commerce for tomorrow

We develop custom Shopware plugins and themes when standard functionality is not enough or a shop needs to match the business model more closely in both design and behaviour. The focus is on cleanly integrated extensions, maintainable themes and technical implementation according to Shopware standards. Beyond that, we support complete Shopware system setups, configuration, structural decisions and technical consulting around the shop.

  • Custom Shopware plugins for specific requirements
  • Shopware themes for branded and maintainable storefronts
  • Technical consulting for shop structure, extensions and implementation
  • Setup and configuration of complete Shopware systems
Shopware Plugins Themes Shop setup Consulting

IT Infrastructure

Self-hosted, GDPR-compliant, professionally set up

All projects run on dedicated servers and Hetzner Cloud — no AWS, no Azure, no data outside the EU. Source control is self-hosted too: our own servers, no SaaS. Every project is set up professionally from day one — with CI/CD pipelines, automated tests at multiple levels (unit, integration, E2E) and a release process that ensures quality beyond the first deployment.

  • Own servers & Hetzner Cloud — hosting exclusively in Germany
  • GDPR-compliant infrastructure without US third-party providers
  • Self-hosted source control — no SaaS
  • Automated CI/CD pipelines with containerised deployment via self-hosted Docker registry
  • Automated tests at every level — unit, integration, E2E
Hetzner Docker CI/CD GDPR Testing

AI Integration

AI Integration

AI is not an end in itself. We analyse together whether and where AI actually helps your product or process — and then integrate the right services cleanly. Our first choice is Mistral as a European provider: powerful and GDPR-compliant. Where requirements call for it, we use OpenAI, Claude or other specialised services. We do not host or train our own models — our focus is on the purposeful integration of proven AI systems into your applications.

Mistral OpenAI Claude API Integration MCP
  • Mistral as a European AI provider — powerful and independent of US services
  • Integration of AI APIs into existing or new applications
  • Complex analysis logic replaced by AI — less complex code, faster results
  • AI-powered automation of time-intensive processes in existing systems
  • Fast AI provider switching through unified abstraction layers — provider always exchangeable

References

Selected projects

A look at our work — projects from different areas.

Shopware Plugin

Checkout Optimisation

E-commerce retailer

Complete overhaul of the checkout process: single-page checkout, smart address auto-completion and mobile-optimised UX.

Shopware 6PHPVue.jsTypeScript
AI Integration

Internal AI Assistant

Service company

RAG-based document assistant that searches internal knowledge bases and returns contextual answers in real time.

OpenAIRAGPythonReact
Web Application

Analytics Dashboard

B2B SaaS startup

Data dashboard with real-time analytics, user management and configurable reports for a growing B2B product.

Next.jsTypeScriptTailwindPostgreSQL

Further projects and detailed case studies available on request.

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