Sergej H.
UX/UI Freelance Designer
Experience
Freelance UX/UI Designer
Telecommunications and Network Expansion Company (FTTH)
› User Research (interviews, process analysis, pain points) as well as planning and running workshops; deriving key UX optimizations and requirements.
› Development of UX/service concepts and an agentic assistance system including chat flow, step logic, and AI solution proposals with confidence scores.
› Creation of user journeys, process maps, and service blueprints in Miro, as well as analysis of complex workflows and translating business requirements into clear UX flows.
› UI/UX prototyping in Figma including information architecture, navigation/interaction patterns, validation and error handling concepts, as well as integrating AI-powered suggestion logics.
UX/UI Freelance Designer
Yanfeng Automotive Interior Systems
- Automotive UX/UI design for a show car
- Ideation and research
UX/UI Freelance Designer
Jungheinrich
- UX/UI design of a B2B area for corporate clients
- Setting up a design system with variables and tokens in Figma
UX/UI Freelance Designer
E.ON Digital Technology
- UX/UI design of intranet modules for viewing and billing orders, scheduling, and managing materials and partner companies
- Expanding and maintaining the design library in Figma
- User research: planning, moderating, and analyzing customer interviews
Lead UX/UI Freelance Designer
Dehner.de
- Complete online shop redesign in Figma
- Responsive mobile-first UX/UI design + prototyping
- Building the design library
UX/UI Freelance Designer
Deutsche Post DHL Group
- UX optimization of the business customer portal
- UX/UI optimization of the become-a-business-customer process
- Optimization of the password creation with two-factor authentication
- Customer journeys, user flows, wireframes, UI design
- User research: planning, moderation, and analysis of customer interviews
- Expansion and maintenance of the design library
- Documentation of user journeys and implementation descriptions for developers
UX/UI Freelance Designer
Robert Bosch GmbH
- UX/UI design for an app in the automotive sector
- UX/UI design, customer journeys, user flows, wireframes
- Expansion and maintenance of the design library
UX/UI Freelance Designer
Betterdoc
- UX/UI design concept of the specialist search for patients
- Matching suggestions for specialists based on a rating scale
- Patient health profile
- Specialist watchlist
Lead UX/UI Freelance Designer
Deutsche Telekom
- Optimization and expansion of the smart home app, UX/UI
- User journey for managing household members
- UX/UI optimization of the online customer center: increasing transparency of used products, creating personal upselling recommendations
- Product and campaign landing pages with tariff example calculator, UX/UI design and prototyping
- Product booking configurator and checkout, UX/UI
- User research: planning, moderation, and analysis of customer interviews
- Working with personas and customer journey mapping with hurdles and opportunities
UX/UI Freelance Designer
Trivago.com
- UX/UI design for a new subsection for regional travel offers
- UX/UI optimization for the trivago app, increasing overall app revenue by 6%
- Addition of a bonus program, UX/UI design
- Preparation, conducting, and analysis of user interviews and quantitative tests
- Expansion and maintenance of the atomic design library
Lead UX Freelance Designer
AXA S.A.
- UX optimization and conversion optimization of product and campaign landing pages and of the rate calculator
- UX writer briefing and review
- Visual QA of front-end development
Lead UX/UI Freelance Designer
Volksbank Raiffeisenbank für Cheil
- Complete design of the online banking web app for Volks- und Raiffeisenbank
- Information architecture, UX/UI design, responsive adjustments, prototyping, atomic design library, micro-interactions
- Icon design and illustrations
- Working according to high security standards
Lead UX/UI Freelance Designer
Vaillant – Heating Manufacturer
- UX/UI relaunch of the website and landing pages
- Interactive prototypes
- Conversion rate optimization for the list and detail pages of the online product catalog: UX/UI
- Micro-interactions, animated prototypes, atomic library, design specifications, visual QA
UX/UI Freelance Designer
E.ON Innogy
- Work on a web app for managing EV charging stations
- UX & UI design for user flows like parameter profiles and firmware updates
- Flowcharts, wireframes, prototypes, icon design
Lead UX/UI Freelance Designer
Vodafone Group
Lead UX/UI designer for Consumer Internet of Things iOS, Android & web apps
Lead designer for the data plan booking app
Lead designer for the SOS band app for older people
Responsible for UX, UI design, prototyping, icon design, micro-interactions, visual QA, user interviews, dev specs
Optimizing front-end development time by implementing a design library
V by Vodafone app won 2 Mobile News Awards in the categories "Innovative Product" and "Best IoT Application" and an IoT Award in the category "Best B2C Project"
Digital Art Director, Lead UX/UI Designer
Boros.de Agency
- Websites and e-shops for various clients in art, culture, and business
- Responsible for UX concept and UI design of responsive websites and e-commerce solutions
- Won multiple agency pitches
- Art/UX direction for UI/UX and motion designers
- Created BITV-compliant, accessible style guides and user journeys
- Other tasks: corporate identity design, video animations, design style guides
UX/UI Freelance Designer & Front-End Developer
Max-Planck-Institut
UI Designer (part-time)
Max-Planck-Institut
Summary
I am a UX/UI designer with more than 16 years of experience, specializing in creating efficient user experiences through engaging user interfaces. My work always focuses on user needs. In my past projects, I helped companies increase their customer loyalty and boost their revenue.
Languages
Education
University of Wuppertal
Diploma II in Communication Design · Communication Design · Wuppertal, Germany · 1.2
Marie Curie Gymnasium
Abitur · Düsseldorf, Germany · 2.4
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