ux, architecture, code

Complex software.
Easy to use

UX, architecture and code from one person. Proven in five products of my own and for clients like Mercedes-Benz and Siemens.

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Projects and case studies

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Workflow optimization: Production Management System + Enterprise Design System
Production management system
Mercedes-Benz
Automotive
Digital Production System Headquarters
Digital production system
Schaeffler AG
Automotive
PasskeyGuard: Open Source Passkey App for iOS/Android
PasskeyGuard for iOS and Android
Merck KGaA
Chemistry
Multi-Brand Design System with White-Label UI Components for 10k+ Employees
Multi-brand design system
Zeppelin Group
Manufacturing
ON!Track 3: Asset Management und Workforce Management Plattform
ON!Track 3 asset management
Hilti AG
Construction
Advanced Cost Value Analysis
Cost value analysis
Schaeffler AG
Automotive
UX Relaunch: Enterprise Credential Management Portal for Global Chemical Industry Leader
Credential management portal
Merck KGaA
Chemistry
Digital Quality Control Interface for Automotive Part Inspection Processes
Digital quality control
Schaeffler AG
Automotive

Clients (13)

  • Mercedes-Benz
  • Bosch
  • MediaMarktSaturn
  • Siemens Healthineers
  • Zeppelin
  • Amazon
  • Merck
  • Schaeffler
  • Hilti
  • Telekom
  • DATEV
  • BAMF
  • Blau

Own products (5)

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I don’t just build for clients.

Five products, five brands, all designed, built and run by me. Each one shows something you can hire me for.

radiorachel.deLive

Music party game, guess the hits on your own phone

Web app and iOS app

Radio Rachel, opens in a new tab

Shows: Real-time multiplayer and a brand with character.

App StoreLive

Free metronome for drummers on the App Store

iOS app

Metro Mate, opens in a new tab

Shows: Native iOS apps from first sketch to the App Store.

workloadzero.deLive

Business suite for time, invoices and projects

SaaS platform

workload.zero, opens in a new tab

Shows: Complex data apps that are still easy to use.

itdone.cloudLive

AI app builder with hosting in Europe

Platform

ITDone, opens in a new tab

Shows: A platform of my own, from infrastructure to AI.

kette.itdone.deLive

From prototype to app, for Claude Code

Design system with AI agents

Die Kette, opens in a new tab

Shows: How I set up design systems and AI development that hold up.

Experience (27)

Development
Mar 2026 - Present9 months
German financial services group (banking & investment)Software Architect
Design & Dev
Mar 2026 - Present9 months
Siemens EnergySr. UX/UI Engineer
Design
Oct 2024 - Present2 years, 2 months
Triestram & Partner GmbHLead UX/UI Designer
Development
Mar 2024 - Present2 years, 9 months
Merck KGaASoftware Architect

Insights (7)

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Engineering Inclusivity: Wie wir das MediaMarktSaturn Design System für zwei Marken und Millionen Nutzer neu erfanden
Dec 18, 20251 min read

Engineering Inclusivity: Wie wir das MediaMarktSaturn Design System für zwei Marken und Millionen Nutzer neu erfanden

A11yAccessibilityChromatic+8
RWE Trading: Der Weg von einer Legacy-Plattform zu moderner Technologie
Dec 13, 20252 min read

RWE Trading: Der Weg von einer Legacy-Plattform zu moderner Technologie

Client WorkDaily InsightsReact+2
Von der Datenbank ins DOM: Die Architektur einer skalierbaren Career-Page-Engine auf Google Cloud
Dec 16, 20251 min read

Von der Datenbank ins DOM: Die Architektur einer skalierbaren Career-Page-Engine auf Google Cloud

Client WorkDaily InsightsPage Generator+5
More speed. More consistency. More success – with a Holistic Design System
Sep 17, 20231 min read

More speed. More consistency. More success – with a Holistic Design System

Design SystemsUX/UI Design
Usability Testing: Der Guide 2025
Oct 2, 20252 min read

Usability Testing: Der Guide 2025

Usability TestingUX/UI Design
Building SkillScore: The Architecture of an AI-Powered Talent Matching Platform with NestJS
Dec 20, 20252 min read

Building SkillScore: The Architecture of an AI-Powered Talent Matching Platform with NestJS

AWS S3Daily InsightsFuzzy Search+7

Documents (4)

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Alexander Friedl
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+49 157 581 508 46