Martin Winter, Product Designer

Martin Winter

Product Designer

UX Design · User Flows · AI-assisted Frontend Development

From complex workflows to usable,
working products.

I’m Martin Winter, a Berlin-based Product Designer focused on enterprise SaaS, user flows and intuitive interfaces. I turn complex requirements into user-facing experiences through UX/UI design, product thinking and AI-assisted frontend development, working with backend developers on complex applications.

Fleet Audit Platform

Fleet Audit Solution | Enterprise SaaS | 2025

Challenge

Banks and leasing companies needed better visibility into vehicle condition, location and audit status across multiple dealerships.

Contribution

Designed role-specific audit workflows, dashboards, vehicle detail views, damage reporting and case assignment flows for auditors, coordinators and financial stakeholders.

Outcome

Delivered interface designs and prototypes connecting vehicle inspections, audit coordination and fleet oversight across different user roles.

Fleet audit platform interface design

Fleet Audit Workflow

Bank

Coordinator

Auditor

Vehicle

AI Damage Detection

Fleet Audit Platform Overview

A fleet audit platform designed to support banks and leasing companies managing vehicle inspections across multiple locations.

The platform connects field auditors, coordinators and financial stakeholders by combining vehicle data, inspection results, AI-supported assessments and audit history into one digital workflow.

Fleet audit platform overview

The Challenge

The platform needed to support multiple user groups with different goals and workflows.

Field auditors required a simple way to inspect vehicles, capture information and document damages on-site. Coordinators needed to manage assignments and monitor audit progress, while banks required a clear overview of vehicle condition, history and status.

My Contribution

As the UX/UI Designer, I focused on designing the main user flows, information structure and interface concepts across the platform.

My work included:

  • Role-specific vehicle audit workflows
  • Dashboard structure and data visualization
  • Vehicle detail views
  • Damage reporting flows
  • Case management and assignment flows
  • Status visualization and filtering concepts

I collaborated closely with the Product Owner to understand business requirements, structure audit information and translate vehicle inspection processes into user flows and interface designs for development.

Fleet audit dashboard with case overview

Design Process

I started by understanding the complete audit lifecycle and mapping how information moved between different users and stages of the process.

From there, I created user flows and structured the information hierarchy to ensure that each user could quickly access the information relevant to their role.

The designs were iterated through discussions with the Product Owner and refined into prototypes and implementation-ready interfaces for the development team.

Key Decisions

Prioritizing information hierarchy

The platform contained many different data points, from vehicle status and inspection results to historical audits and damage information.

I focused on presenting the most important information first and creating clear visual relationships between overview screens and detailed views.

Designing for multiple roles

Instead of creating one generic experience, the interface was structured around the different needs of auditors, coordinators and financial stakeholders.

Each role required different levels of detail, actions and information visibility.

Fleet audit dashboard showing audit cases

The Outcome

The resulting designs connected vehicle inspections, damage reporting, case assignments and audit oversight within a shared platform structure.

Role-specific flows, prototypes and interface designs provided the development team with a foundation for implementation, refined through discussions with the Product Owner.

How I Work — From Understanding to Delivery

Understand

Understand users, business goals and the workflows behind the problem.

Define

Clarify the problem, align stakeholders and define scope and priorities.

Design

Explore solutions through user flows, prototypes and reusable interface patterns.

Build

Implement interfaces with AI-assisted frontend development and collaborate with backend developers on integration.

Deliver & Improve

Support implementation, validate usability and behaviour, and refine the experience after release.

Automotive Lead Management Platform Overview

B2B Sales Platform | Automotive SaaS | 2023–2025

Challenge

The existing platform supported dealership teams throughout the customer lifecycle but required continuous improvements in workflows, usability and information structure. The challenge was evolving complex processes while maintaining consistency across multiple automotive applications.

Contribution

Redesigned customer communication workflows, designed a calendar and activity overview, and contributed to reusable interface patterns in collaboration with Product Owners and engineers.

Outcome

Designed clearer task flows and activity overviews for dealership teams, while supporting interface consistency across related automotive applications.

Automotive Lead Management Platform interface overview

Automotive Lead Management Workflow

Lead Analysis

Customer Contact

Trade-in Evaluation

Quote Creation

Offer Management

Online Contract

Vehicle Delivery

Service & Customer Lifecycle

Overview

An enterprise SaaS platform supporting automotive dealerships throughout the customer lifecycle — from initial lead analysis and customer contact to vehicle offers, contracts, delivery and after-sales processes.

The platform connected sales activities, customer information and operational workflows into one integrated environment used by dealership teams.

Calendar and activity overview for automotive dealership teams

The Challenge

The platform covered multiple stages of the customer journey and supported different dealership roles with different goals and responsibilities.

Sales teams needed efficient ways to manage leads and customer interactions, while managers required structured overviews and visibility into ongoing activities.

My Contribution

As a UX/UI Designer, I focused on improving existing workflows and designing new product capabilities based on business needs, user feedback and process analysis.

Simplifying Customer Messaging for Dealership Teams

I redesigned the message-sending flow to bring template selection, editing and previewing into one composition dialog.

Before: a fragmented workflow

The entry point was a dropdown within the activity overview rather than a clearly labelled action button. Template selection, text editing and previewing were spread across separate steps and dialogs.

The interface did not clearly indicate which templates could be personalised, and the preview offered no direct way to return to editing.

After: one composition dialog

The redesigned flow starts with a dedicated Send message button. Template selection, editing and a live preview are grouped in one dialog, allowing users to review the message without leaving the editor.

Key design decisions

  • Introduce a clearly labelled entry point for sending a message.
  • Keep template selection and editing together to avoid switching between dialogs.
  • Identify editable templates so users know which messages they can personalise.
  • Show a live preview alongside the editor so users can check the message as they compose it.

I collaborated closely with the Product Owner to understand business requirements, structure complex information and translate processes into user-friendly solutions for development.

Design Process

I started by understanding how users worked with the existing platform and where processes created unnecessary complexity.

By analyzing workflows and discussing requirements with stakeholders, I identified opportunities for improvement and translated them into clearer user flows, interface concepts and functional designs.

For new features, I designed both customer-facing experiences and internal workflows, ensuring that different user roles could complete their tasks efficiently.

Designing a calendar and activity overview

I designed an overview combining incoming events, assigned activities and a to-do list, with filtering options and a calling action.

The challenge was to bring these connected workflows together while keeping each section easy to distinguish and navigate.

Calendar Overview

Calendar overview

Key Decisions

Simplifying complex business processes

The platform supported multiple connected processes across the customer lifecycle, from lead analysis and customer communication to offers, contracts and delivery.

I focused on understanding the real working process behind each feature and redesigning flows to make tasks clearer, faster and more intuitive for users.

Designing for multiple roles

New features often affected both customer-facing experiences and internal teams managing the process.

I considered both perspectives when designing solutions — ensuring that customer interactions were simple while internal workflows remained efficient and manageable.

The Outcome

My work covered customer communication flows, calendar and activity views, and reusable interface patterns across the platform.

I translated business requirements and workflow analysis into interface designs, working with Product Owners and engineers to address implementation constraints and maintain consistency across related applications.

About Martin Winter

I’m Martin Winter, a Berlin-based Product Designer with a background in customer support, onboarding and software testing.

My experience spans enterprise SaaS, complex operational workflows and collaboration with Product Owners, stakeholders, and engineering teams. This background helps me understand both the customer experience and the practical constraints behind a product.

Alongside design, I contribute to product definition and delivery, and use AI-assisted frontend development to turn designs into working solutions.

VinCaffé — Website & Reservation Experience

AI-assisted Development | Content Integration | Deployment

Challenge

Customers needed easy access to current menus, events and reservation requests, while the café needed a practical way to keep content up to date.

Contribution

Designed and built the responsive website using AI-assisted development, including reservation requests, form validation, server-side emails and content updates through Google Sheets.

Outcome

A live website with an integrated reservation request flow and editable content, allowing the café to update menus and events without changing the source code.

Website & Reservation Experience

I designed and built a responsive website for VinCaffé, a neighbourhood café in Prague. The website gives visitors access to current menus, events, opening hours and a reservation request form.

Using AI-assisted development, I implemented the interface, form validation and server-side reservation emails. Frequently updated content is connected to Google Sheets, allowing the café to publish changes without editing the source code.

The project also included a shared visual identity for the website, printed menus, business cards and illustrations.

Role

Brand, Graphic & UX/UI Designer · Developer

Scope

Brand Identity · Graphic Design · Print Design · Illustration · UX/UI Design · Responsive Web Design · Front-end Development · Reservation Flow · SEO · Deployment

Deliverables

Website · Food & Drink Menus · Business Cards · Illustrations · Visual Assets · Brand Applications · Reservation Emails

Tools & Technologies

Figma · Illustrator · HTML · CSS · JavaScript · PHP · PHPMailer · Google Sheets

The Challenge

VinCaffé needed more than a standalone website. The goal was to create a consistent visual identity that could work across the café’s physical and digital communication.

Customers interact with the brand through printed menus, in-store materials, online content and the website, so these touchpoints needed to feel connected while still remaining practical and easy to maintain.

For the website itself, visitors needed quick access to frequently changing information such as weekly menus, weekend brunch, events, opening hours and reservations.

My Contribution

I designed the website’s information structure, responsive layouts and reservation request flow, then implemented them in HTML, CSS and JavaScript using AI-assisted development.

The reservation form includes validation, loading and success states, reCAPTCHA protection, and server-side email handling with PHP and PHPMailer.

I connected weekly menus, weekend brunch and events to Google Sheets so the café can update this content without changing the source code.

Alongside the website, I developed the visual identity and applied it to printed menus, business cards, illustrations and other customer-facing materials.

VinCaffé responsive website on desktop and mobile

Visual Identity & Graphic Design

The visual identity was designed to reflect the warm, informal and personal character of the café.

Rather than treating each output as a separate design, I created a shared visual language that could be reused across the brand.

VinCaffé menu and custom illustrations

This included:

  • Printed food and drink menus
  • Business cards
  • Custom illustrations and graphic elements
  • Typography and colour system
  • Visual assets for digital communication
  • Website UI and supporting email communication

The same visual principles are therefore visible across both the physical café experience and its digital presence.

VinCaffé reservation form

The Outcome

VinCaffé now has a live responsive website where customers can browse current menus, discover events and submit reservation requests.

The café can update weekly menus, brunch information and events through Google Sheets without editing the website’s source code. A shared visual identity connects the website with printed menus, business cards and other brand materials.

Dynamic content can be managed independently through Google Sheets, while the website and reservation system require minimal ongoing technical maintenance.

References

Christian

CEO, Company owner

Martin translated complex user and business requirements into intuitive interfaces and collaborated closely with Product Owners and developers to deliver high-quality enterprise products.

Vojta

Software Developer

Martin’s instructions are well-structured, and easy to implement. What sets him apart is his understanding of the challenges developers face—he doesn’t just design, he proposes solutions that work within technical constraints. This makes him a designer who truly adds value to the team. His openness to adjustments and adaptability when requirements change further simplify collaboration, even under tight deadlines.

Olga

Platform manager

Martin’s communication skills are well-thought-out—he presents ideas with a can-do attitude, convincing through logic, data, and user testing results. His passion for design is infectious; he speaks about UX/UI with an enthusiasm that motivates everybody. Whether it’s aligning stakeholders or refining a concept, he approaches every challenge with a mix of creativity and analytical thinking. It’s rare to find someone genuinely so excited about their work.

Tools

Figma Jira Notion Confluence OpenAI

Socials

Availability

80+ hours monthly

Languages

Czech English German

Let's talk


Have a project in mind or a question? Leave me a message and I'll get back to you.

All fields are required.

Your name helps me address you personally in my reply.
I'll send a confirmation and answer to this address.