Tim WiltziusProduct Designer & UX Expert

8+ years in tech & UX/UI - working across design, product, and engineering.

A Few Projects

Education

Human-Computer Interaction at LMU Munich (Germany)

Media informatics with the scope on human-machine interaction.

Human-Computer Systems at University of Würzburg (Germany)

Interdisciplinary program, combining human-computer interaction, psychology and computer science.

Computer Science at Lycée Technique des Arts et Métiers (Luxembourg)

Foundations in computer science with focus on programming, software, hardware, operating systems, network and server administration.

Principles & Process

The process usually starts with user research to better understand the problem space, gather user insights, and define requirements. Business goals, user needs, and technical constraints are considered early to create a solid foundation for decision-making.

Domains, systems, use cases, and workflows are analyzed to identify opportunities, dependencies, and challenges. Complex requirements are broken down into smaller parts to explore them in more detail and structure the problem space more clearly.

Early ideas, sketches, and flows help validate assumptions and collect feedback as soon as possible. Once the problem space and requirements are clearly defined, the process transitions into ideation and concept development together with relevant stakeholders.

Ideas are visualized through low-fidelity wireframes and mockups, allowing rapid iteration and early validation. Concepts are refined through testing, feedback, and design reviews to align user needs, business goals, and stakeholder expectations.

Solutions are aligned with existing guidelines, style guides, related products, and design systems to ensure consistency across experiences. An open and transparent process helps maintain collaboration and encourages continuous feedback throughout development.

User Interfaces are kept minimal and intuitive, with a strong focus on accessibility, usability, and clarity. Existing patterns are improved where needed, while new ideas and approaches are explored when they provide meaningful value to the overall user experience.

Validated concepts are translated into high-fidelity UI designs ready for implementation. Technical reviews are considered early to support scalable and sustainable solutions, while detailed specifications, interactions, and user flows ensure smooth collaboration between design and development.

Cross-functional collaboration helps create a shared understanding of user needs, expectations, and product goals. Continuous discovery, consistency, and early user feedback support smoother workflows and more informed product decisions.

Accessibility, thoughtful microcopy, and data-informed decision-making contribute to more effective user experiences. A technical understanding of frontend and systems helps bridge the gap between design and development and supports practical, implementation-focused solutions.

Methods & Skills

User Experience

Solid knowledge of UX methods and principles.

Holistic Design

Considering the full system, from user needs to business goals.

Mapping

Structuring and visualizing processes, journeys, and systems.

Surveys

Collecting quantitative insights and user feedback.

Customer Journey

Optimizing end-to-end user experiences across touchpoints.

Information Architecture

Defining clear information structures.

User Research

Understanding user behaviors, needs, and motivations.

Domain Analysis

Understanding business context, constraints and key drivers.

User & Usability Testing

Evaluating usability and collecting user feedback.

Context of Use Analysis

Understanding users, tasks, and environments to guide design decisions.

Personas

Target users and groups based on user research.

Research Methods

Applying UX and scientific research methods & statistics.

Discovery

Exploring problems, context, and opportunities.

Interviews

Gathering insights through direct user conversations.

Storytelling

Communicating user experiences through clear, engaging narratives.

Design Reviews

Reviewing designs with stakeholders to gather feedback and buy-in.

UX Writing

Writing for contexts, needs, and behaviors in english and german.

Design Workflows

Improving design collaboration.

Wireframes

Creating low-fidelity layouts to explore ideas and variants.

Conception

Ideating and exploring solutions.

UX Reviews

Evaluating interfaces to identify usability issues and check UX.

Style Guide

Design guidelines for consistent design.

Competitor Analysis

Analyzing competitors to understand the market.

Service Design

Designing the full experience across all touchpoints.

User Interface Design

Design of user interfaces and visual elements.

Figma

Designing and collaborating on interface solutions.

UI Component Library

Working with Material, Prime, Ant, Angular UI, and others.

Accessibility

Designing inclusive experiences aligned with WCAG standards.

Usability

Ensuring intuitive, efficient, and accessible user experiences.

Mobile

Designing for Android, iOS, and responsive web applications.

App Design System

Defining and maintaining components, design standards and guidelines.

White-Labeling

Creating flexible UI for different brand styles (design & configuration).

High-Fidelity design

Creating detailed, pixel-perfect user interfaces.

Web

Designing responsive and scalable web experiences.

Interaction Design

Defining user interactions and system behavior.

UI Design Systems

Working with e.g. Google Material & Apple Human Interface Guidelines.

Prototyping

Creating interactive design prototypes and clickdummies.

Design Library

Building and maintaining reusable interface components and tokens.

Design Handover

Preparing designs and specs for implementation.

CMS Editing

Editing and managing website content (e.g. Headless, WordPress).​

Graphic Design

Applying core principles, color theory, and visual practices.

Iconography

Designing consistent icons using grid systems.

Adobe Creative Suite

Hands-On experience with the Adobe Creative Suite.

Illustrations

Creating visual (vector) assets to support communication.

Visual Communication

Using visuals to convey information.

3D Modelling

Basic experience creating 3D assets with Unity.

Layout and Hierarchy

Organizing elements for clarity.

Information Visualization

Helping users understand data through (interactive) visualization.

Typography

Applying typefaces to create clear, readable, and consistent layouts.

Brand/Corporate Design

Developing and using brand guidelines in the product.

Product Management

Foundational knowledge of product management and team organization.

B2C

Experience with customer-facing digital products.

Requirements Engineering

Defining, analyzing, and documenting product requirements.

Analytics

Using data to drive decisions (Adobe Analytics).

Scrum Master

Facilitating Scrum rituals and team alignment.

B2B

Experience with business-facing digital products.

Backlog Management

Specifying and managing user stories and development tickets.

Dual track agile

Balancing discovery and delivery in agile processes.

Trainings

Onboarding key usersand stakeholders to learn to use the software.

IT Management

Knowledge of IT systems and management principles.

Enterprise

Experience designing applications for internal processes.

Kick-Off Workshops

Aligning goals, scope, and expectations at project start.

Documentation

Writing handbooks and user guidance to support effective usage.

Testing

Verifying functionality and finding defects.

IT Security

Basic knowledge of IT security and attack methods.

E-Commerce

Experience designing online shops.

Agile

Working with Scrum and Kanban methodologies.

Stakeholder Management

Aligning stakeholders and managing expectations across teams.

Jira & Confluence

Hands-On experience with Atlassian products.

Office Applications

Proficiency in common office applications.

Software Development

Solid theoretical and practical background in software development.

HTML, CSS, JavaScript

Creating and styling interactive web interfaces.

Algorithms and Data Structures

Fundamentals of algorithms and data structures.

Network Engineering & Server Admin

Basic knowledge of network systems & server administration.

Methods of Software Engineering

Knowledge of software engineering processes and methods.

Git

Managing version control and collaboration in projects.

Docker

Basic knowledge of containerization with Docker.

Computer Architecture

Practical knowledge of computer architecture.

Database

Structuring and querying persistent data (MySQL).

Android & iOS SDK

Basic knowledge of Android and iOS development.

Microcontrollers & Electronics

Using and developing with microcontrollers (Rasp. Pi, ESP, Arduino).

Java

Basic experience with object-oriented programming principles.

Scripting

Basic experience with scripting languages, e.g. Python for data science.

CSS Preprocessors

Working with Sass, Less & Stylus.

Human-Computer Interaction

Study of how people interact with technology.

Immersive Technologies

Exploring VR and spatial interaction concepts.

Human Factors

Designing based on human needs, capabilities, and limitations.

Industrial Design

Basic understanding of industrial design.

Psychology

Applying behavioral principles to improve user experiences.

User-Centered Design

Applying user-centered design methods.

Psychological Ergonomics

Designing with human mental processes in mind.

Design Thinking

Solving problems through design.

Usability & Software Ergonomics

Designing for comfort, efficiency, and human well-being.

Interactive Interfaces

Designing interactive user interfaces (e.g. with haptic feedback).

Statistics

Methods for analyzing and interpreting data.

Experience Design (XD)

Designing the full product experience, not just screens.

Cognitive Science

Understanding perception, memory, and decision-making in users.

Computer Graphics

Rendering graphics for user interfaces.

Media Informatics & Multimedia

Knowledge of multimedia systems and principles.

Certifications