Recommended expert
Karsten Lenz
UX Designer & Web Developer
Experience
Feb 2026 - Present
1 monthUX Designer & Web Developer
Freelance
Mar 2023 - Present
3 yearsOrganizer and Host for UX Roundtable HH and World Usability Day HH
uxHH - User Experience Hamburg
Jan 2022 - Dec 2022
1 yearSenior Frontend Developer / UX Designer
Computer Science 101
Jan 2021 - Dec 2021
1 yearFrontend Developer / UX Designer
Computer Science 101
Jul 2020 - Jan 2021
7 monthsTrainee 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
Mar 2017 - Sep 2020
3 years 7 monthsSenior UX Designer
Medienwerft Agentur für digitale Medien und Kommunikation GmbH
Aug 2015 - Feb 2017
1 year 7 monthsUX Designer
Medienwerft Agentur für digitale Medien und Kommunikation GmbH
Oct 2014 - Feb 2015
5 monthsFreelance QA Testing
LAI Global Game Services
Aug 2012 - Aug 2014
2 years 1 monthGame 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
Jan 2012 - Aug 2012
8 monthsConversion 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
Apr 2010 - Aug 2010
5 monthsUser 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
Feb 2009 - Jan 2010
1 yearSenior 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
Jun 2008 - Jan 2009
8 monthsQA Game Tester
dtp young entertainment GmbH & Co. KG
- Localization and functionality testing for PC, NDS and Wii
Jul 2007 - Sep 2007
3 monthsIntern
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
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Media and Entertainment (9 years), Information Technology (7.5 years), Advertising (4 years), and Education (1 year).
Media and Entertainment
Information Technology
Advertising
Education
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Product Development (10 years), Information Technology (7 years), Marketing (5.5 years), Project Management (3 years), Quality Assurance (2 years), and Business Intelligence (0.5 years).
Product Development
Information Technology
Marketing
Project Management
Quality Assurance
Business Intelligence
Skills
- Web Development
- Artificial Intelligence (Ai)
- Ux Management
Languages
German
NativeEnglish
AdvancedSpanish
ElementaryFrench
ElementaryRussian
Elementary ...and 1 more
Education
Oct 2014 - Jun 2015
Beijing Normal University
Chinese Language · Beijing, China
Oct 2010 - Jun 2011
Goldsmiths College, U. of London
Master of Arts, Digital Media · Digital Media · London, United Kingdom
Oct 2005 - Jun 2008
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)
CPUX Foundation Level
HSK Chinese Proficency Test Level 2
Profile
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Frequently asked questions
Do you have questions? Here you can find further information.
Where is Karsten based?
Karsten is based in Hamburg, Germany.
What languages does Karsten speak?
Karsten speaks the following languages: German (Native), English (Advanced), Spanish (Elementary), French (Elementary), Russian (Elementary), Chinese (Elementary).
How many years of experience does Karsten have?
Karsten has at least 15 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 1 month. Note that Karsten may not have shared all experience and actually has more experience.
What roles would Karsten be best suited for?
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.
What is Karsten's latest experience?
Karsten's most recent position is UX Designer & Web Developer at Freelance.
What companies has Karsten worked for in recent years?
In recent years, Karsten has worked for Freelance, uxHH - User Experience Hamburg, and Computer Science 101.
Which industries is Karsten most experienced in?
Karsten is most experienced in industries like Media, Entertainment and Publishing, Information Technology (IT), and Advertising. Karsten also has some experience in Education.
Which business areas is Karsten most experienced in?
Karsten is most experienced in business areas like Product Development, Information Technology (IT), and Marketing. Karsten also has some experience in Project Management, Quality Assurance (QA), and Business Intelligence.
Which industries has Karsten worked in recently?
Karsten has recently worked in industries like Information Technology (IT) and Education.
Which business areas has Karsten worked in recently?
Karsten has recently worked in business areas like Marketing, Information Technology (IT), and Product Development.
What is Karsten's education?
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.
Does Karsten have any certificates?
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.
What is the availability of Karsten?
Karsten will be available from March 2026.
What is the rate of Karsten?
Karsten's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.
How to hire Karsten?
To hire Karsten, click the Meet button on the profile to request a meeting and discuss your project needs.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
1200
900
600
300
Market avg: 850-1010 €
Market avg: 850-1010 €
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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