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 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.
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.
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.
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 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.
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.
The original message controls were embedded in the activity overview.
Templates were selected before opening the message editor, without a
clear indication of
which could be edited.Personalised text was entered in a separate dialog.The preview appeared in another dialog, without a direct route back 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.
A dedicated Send message button opens the composition dialog.
Template selection is part of the dialog; editable templates are marked.
The proposed dialog brings template selection, editing and a live
preview into one
place.
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
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.
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
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.
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.
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.
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
Socials
Availability
80+ hours monthly
Languages
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