Marios Stathogiannis
7424 Citrus Heights,CA
Summary
Innovative UX/UI Designer with a strong focus on usability and accessibility. Expertise in user research, wireframing, and cross-functional collaboration to enhance user experiences across web and mobile applications.
Overview
18
18
years of professional experience
1
1
Certificate
Work History
Senior UX/UI Designer (Remote)
Portside.co
San Francisco, California
04.2022 - 06.2025
- Designed intuitive web and mobile interfaces to elevate user experience
- Built and maintained a scalable design system ensuring consistency across platforms
- Conducted user research and interviews to guide usability and design improvements
- Developed wireframes, mockups, and interactive prototypes to communicate solutions
- Collaborated closely with developers to ensure technical feasibility of designs
- Mentored junior designers in UX best practices and design principles
- Analyzed customer feedback, leading to impactful UX refinements
- Generated innovative product ideas in cross-functional brainstorming sessions
- Researched and applied current UX/UI trends to enhance design effectiveness
- Contributed to a 25% increase in company revenue, re-engaged all former users, and attracted 150 new clients, including private airline partners operating 9–15 aircraft each
- Design contributions supported the company in securing $100 million in funding
Senior UX/UI Designer (Remote)
Multiplica
Barcelona, Spain
12.2021 - 03.2022
- Designed web and mobile interfaces with a strong focus on user experience and accessibility
- Conducted user research to gather insights and continuously refine design strategies
- Created wireframes, interactive prototypes, and high-fidelity mockups for desktop and mobile using Figma and Photoshop
- Collaborated with cross-functional teams to define project requirements and maintain strategic alignment
- Performed usability testing to identify friction points and enhance user interactions
- Developed and maintained style guides to ensure visual and functional consistency across platforms
- Managed multiple design projects simultaneously, consistently meeting deadlines without compromising quality
- Provided detailed UI component guidance for consistent implementation across buttons, forms, and navigation elements
- Delivered designs that achieved 100% client satisfaction, resulting in full contract renewals for another year and strengthened long-term partnerships
Senior UX/UI Designer ( Remote)
Emvelia.com - Artlimes.com
London, United Kingdom
10.2019 - 10.2021
- Designed user interfaces to enhance user experience across web applications
- Collaborated with developers to ensure smooth and effective design implementation
- Conducted user research and gathered usability feedback to inform design improvements
- Created wireframes and interactive prototypes to support new feature development
- Participated in design reviews to ensure alignment with brand and product goals
- Developed comprehensive style guides to maintain consistency across the digital platform
- Produced high-fidelity mockups using Figma and Photoshop for seamless handoff
- Advised on UI components to ensure consistency across all user flows and screens
- Helped onboard 1,000+ new artists, with 90% adopting new paid features that provided unified analytics across the platform and social media
- Contributed to a 30% increase in overall sales through user-centered design enhancements and strategic feature implementation
Senior UX/UI Designer (Remote)
iRepair.gr
Athens, Greece
12.2016 - 10.2019
- Developed wireframes and prototypes to visualize and communicate web application design concepts
- Collaborated with developers to ensure seamless implementation of design specifications and interactions
- Designed intuitive, user-friendly interfaces across digital platforms to optimize user experience
- Created and maintained style guides to ensure consistency in branding and visual elements across all projects
- Iterated on existing designs using user feedback and industry trends to keep products relevant and effective
- Participated in brainstorming sessions to drive innovative and user-centered design solutions
- Produced high-fidelity mockups for desktop and mobile applications using Figma and Photoshop
- Conducted competitive analysis to identify best practices and inform UX/UI improvements
- Supported business growth, contributing to a 23% increase in sales and enabling the expansion of retail locations from 18 to 34 stores
Ecommerce Manager / UI Designer
Bettersport.gr
Athens, Greece
09.2012 - 12.2016
- Directed daily team operations to improve workflow efficiency and overall productivity
- Managed project timelines and coordinated resources to ensure on-time, successful execution
- Developed and implemented training programs to elevate staff skills and performance
- Analyzed performance metrics to identify and act on process improvement opportunities
- Facilitated regular team meetings to align on priorities, goals, and execution strategies
- Oversaw budget management for departmental projects, ensuring effective cost control
- Monitored staff performance and addressed issues proactively to maintain high team standards
- Coached and mentored team members, fostering professional development and strong morale
- Contributed to a 200% increase in sales, directly enabling the opening of 4 new store locations and the expansion of the team by 13 new employees
Graphic Web Designer (Remote)
Hotelrez.net Hotelrez.co.uk
London, United Kingdom
09.2007 - 12.2012
- Created engaging, user-centric website layouts for travel and hospitality clients using Adobe Creative Suite
- Optimized user experience through responsive design techniques across desktop, tablet, and mobile devices
- Conducted research on current design and UX trends to inform creative direction and enhance visual impact
- Collaborated with the marketing team to develop visually compelling promotional and branding materials
- Developed detailed mockups and prototypes in Photoshop and Illustrator, ensuring brand consistency
- Maintained an organized library of graphic assets including fonts, icons, and logos for efficient reuse
- Monitored website analytics to identify areas for UX/UI improvement and refine design strategies accordingly
- Played a key role in signing 900+ hotels to the booking engine, significantly expanding platform reach and client adoption
Education
Associate of Arts - Graphic - Web Design
Integraphics
Athens07-2005
Associate of Arts - Web Design
Middlesex University of London
London UK07-2002
Skills
- User interface design
- Wireframing and prototyping
- Interaction design
- Project management
- Cross-functional collaboration
- User research
- Creative brainstorming
- Mentorship and guidance
- Color theory
- Responsive design
- Usability and accessibility
- Prototyping skills
- HTML and CSS
- Self motivation
- User experience testing
- Design thinking methodology
- User-centered design principles
- Figma expertise
- Library development
- Agile project management
- Functionality testing strategies
- A/B testing techniques
- Problem-solving skills
- Design systems development
- Usability testing methods
- Adobe Creative Suite proficiency
- Visual design principles
- Usability testing
- Design systems
Certification
Graphic - Web Design
Languages
English
Full Professional
Spanish
Full Professional
Greek
Native/ Bilingual
Timeline
Senior UX/UI Designer (Remote)
Portside.co
04.2022 - 06.2025
Senior UX/UI Designer (Remote)
Multiplica
12.2021 - 03.2022
Senior UX/UI Designer ( Remote)
Emvelia.com - Artlimes.com
10.2019 - 10.2021
Senior UX/UI Designer (Remote)
iRepair.gr
12.2016 - 10.2019
Ecommerce Manager / UI Designer
Bettersport.gr
09.2012 - 12.2016
Graphic Web Designer (Remote)
Hotelrez.net Hotelrez.co.uk
09.2007 - 12.2012
Associate of Arts - Graphic - Web Design
Integraphics
Associate of Arts - Web Design
Middlesex University of London
https://www.linkedin.com/in/mariostathojohn/
References
References available upon request.
Portfolio
https://drive.google.com/file/d/1MtSNg6BEfqMbyvk_XKKgdLSb2Q3j57Oy/view?usp=sharing
References
References available upon request.
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