Karsten Lenz-UX Designer & Web Developer
Check rate
Experience
UX Designer & Web Developer
Freelance
Organizer and Host for UX Roundtable HH and World Usability Day HH
uxHH - User Experience Hamburg
Senior Frontend Developer / UX Designer
Computer Science 101
Frontend Developer / UX Designer
Computer Science 101
Trainee Web Development
neuefische GmbH - School and Pool for Digital Talent
Full-time coding bootcamp totalling over 540 hours of programming.
Development of a web app as capstone project.
Tools and Technologies covered by the bootcamp:
HTML5
CSS3
JavaScript ES2020
React
Storybook
Styled Components
Cypress
Jest
Node.js
Express
MongoDB
mongoose
npm
Git
Senior UX Designer
Medienwerft Agentur für digitale Medien und Kommunikation GmbH
UX Designer
Medienwerft Agentur für digitale Medien und Kommunikation GmbH
Freelance QA Testing
LAI Global Game Services
Game Producer
Farbflut Entertainment GmbH
- Project management for the successful free-to-play browser games [link] [link] and [link]
- Communicator, organizer
- Getting things done, keeping people happy
- A healthy dose of UX design, game balancing and guerilla marketing
Conversion Manager
Goodgame Studios
- Optimizing marketing efforts to better convert traffic into online game signups
- Setting up A/B tests for landing pages, screenshots and banner ads
- Monitoring and analysing tracking data from various marketing and in-game sources
- Preparing data for other departments
User Experience Design Intern
SinnerSchrader
- Developing concepts for website user interfaces
- Creating wireframes, flow charts, site maps and concept documents
- Conveying these concepts to clients in telephone conferences
Senior QA Tester
dtp young entertainment GmbH & Co. KG
- Lead testing for 10 shipped Nintendo DS titles published by dtp young entertainment, managing up to 5 projects at the same time
- Coordinating in-house and external test teams for functionality and German localization testing
QA Game Tester
dtp young entertainment GmbH & Co. KG
- Localization and functionality testing for PC, NDS and Wii
Intern
MTV Game One
- Recording and pre-compiling video game footage for the show
- Various tasks during shooting in the studio and on location
- Attending the editors' meetings
- Preparing ideas and treatments for the show
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Media and Entertainment, Information Technology, Advertising, and Education.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Product Development, Information Technology, Marketing, Project Management, Quality Assurance, and Business Intelligence.
Skills
- Web Development
- Artificial Intelligence (Ai)
- Ux Management
Languages
Education
Beijing Normal University
Chinese Language · Beijing, China
Goldsmiths College, U. of London
Master of Arts, Digital Media · Digital Media · London, United Kingdom
Universität Hamburg / University of Hamburg
Bachelor of Arts, Media and Communication Studies · Media and Communication Studies · Hamburg, Germany
Certifications & licenses
Certified Professional For User Experience - Essentials In UX And HCD Management (CPUX-M)
HSK Chinese Proficency Test Level 2
Statistics
Experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Karsten is based in Hamburg, Germany.
Karsten speaks the following languages: German (Native), English (Advanced), Spanish (Elementary), French (Elementary), Russian (Elementary), Chinese (Elementary).
Karsten has at least 16 years of experience. During this time, Karsten has worked in at least 14 different roles and for 11 different companies. The average length of individual experience is 1 year and 2 months. Note that Karsten may not have shared all experience and actually has more experience.
Based on recent experience, Karsten would be well-suited for roles such as: UX Designer & Web Developer, Organizer and Host for UX Roundtable HH and World Usability Day HH, Senior Frontend Developer / UX Designer.
Karsten's most recent position is UX Designer & Web Developer at Freelance.
In recent years, Karsten has worked for Freelance, uxHH - User Experience Hamburg, and Computer Science 101.
Karsten is most experienced in industries like Media and Entertainment, Information Technology, and Advertising. Karsten also has some experience in Education.
Karsten is most experienced in business areas like Product Development, Information Technology, and Marketing. Karsten also has some experience in Project Management, Quality Assurance, and Business Intelligence.
Karsten has recently worked in industries like Information Technology and Education.
Karsten has recently worked in business areas like Marketing, Information Technology, and Product Development.
Karsten holds a Master in Digital Media from Goldsmiths College, U. of London, a Bachelor in Chinese Language from Beijing Normal University and a Bachelor in Media and Communication Studies from Universität Hamburg / University of Hamburg.
Karsten has 3 certificates. These include: Certified Professional For User Experience - Essentials In UX And HCD Management (CPUX-M), CPUX Foundation Level, and HSK Chinese Proficency Test Level 2.
The availability of Karsten needs to be confirmed.
Daily rate distribution
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Average rates for similar positions
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The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 26 Aug 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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