Malt welcome

Welcome to Sebastian's freelance profile!

Malt gives you access to the best freelancers for your projects. Contact Sebastian to discuss your project or search for other freelancer profiles on Malt.

Sebastian Marciniak

Senior UXUI Designer
  • Suggested rate
    €302 / day
  • Experience15+ years
  • Response rate100%
  • Response time1 hour
The project will begin once you accept Sebastian's quote.
Location and workplace preferences
Location
London, United Kingdom
Remote only
Primarily works remotely
Verifications

Freelancer code of conduct signed

Read the Malt code of conduct
Verified email
Reputation
4409Followers
50219Views
11047Appreciations
Languages
Categories
Share this profile
These freelancer profiles also match your search criteria
Agatha FrydrychAF

Agatha Frydrych

Backend Java Software Engineer

Baptiste DuhenBD

Baptiste Duhen

Fullstack developer

Amed HamouAH

Amed Hamou

Senior Lead Developer

Audrey ChampionAC

Audrey Champion

Web developer

Skill set
Industry fields of expertise
Sebastian in a few words
I am a multidisciplinary designer with years of experience, passionate about turning ideas into useful and creative products.

I create solutions that align business goals with the latest trends, evolving technology, and meticulous attention to detail, all through a user-centred approach.

My collaboration with teams and clients is founded on reliability and trust.
Experience
  • Efigence S.A.
    Senior Product UXUI Designer
    DIGITAL & IT
    January 2021 - Today (3 years and 11 months)
    Warsaw, Poland
    • Defined UX/UI strategies aligned with business and user goals.
    • Designed multi-platform, responsive interfaces and prototypes.
    • Conducted user research and usability testing for data-driven design.
    • Built and maintained design systems for consistency.
    • Mentored junior designers and led skill-building workshops.
    • Partnered with product, development, and marketing teams.
    • Ensured WCAG compliance for accessible user experiences.
    • Applied A/B testing and feedback to refine solutions.
    • Kept up-to-date with UX/UI trends and best practices.
    ux design
  • e-Kiosk S.A.
    Senior Product UXUI Designer
    PRESS & MEDIA
    December 2016 - December 2020 (4 years)
    Warsaw, Poland
    • Product strategy
    • E-commerce solutions
    • UX/UI process
    • UX research and usability tests
    • Web and mobile apps
    • Design systems
    • Developers cooperation
    • Leading and mentoring
    • Teamwork and communication
  • Cube Group S.A.
    Senior Graphic Designer
    DIGITAL & IT
    May 2011 - September 2013 (2 years and 4 months)
    Warsaw, Poland
    • Banner ads
    • Landing pages
    • Social media
    • Key visuals
    • Website design
    • Brand identity
    • Animations
    • Frontend development HTML/CSS
    • Teamwork and communication
Recommendations
Education
  • Computer Science - Master of Science in Engineering
    Lublin University of Technology
    2005