Ux Designer Product Design

MARIOS STATHOGIANNIS

**** ****** *******, ** ***** +1-916-***-**** ************@*****.*** LinkedIn Portfolio PROFILE SUMMARY

Versatile and detail-oriented Senior UX/UI & Product Designer with 10+ years of global experience delivering user-centric, accessible, and visually compelling digital products across SaaS, eCommerce, aviation, retail, and travel industries. Proven success leading full-cycle product design from user research and wireframing to high-fidelity mockups and developer collaboration. Skilled in building scalable design systems, crafting responsive interfaces, and driving cross-functional collaboration to align design vision with business goals. Notable impact includes driving a major increase in sales, securing multi-million dollars in funding, and onboarding a large group of artists. Passionate about inclusive design, 0-to-1 product launches, and mentoring emerging designers to uphold design excellence at scale. CORE COMPETENCIES

Product Vision, Strategy & Storytelling • Executive Alignment • Stakeholder Communication • Mentorship & Coaching • Service Design Cross-Org Collaboration • User-Centered & Outcome-Focused Design • Design Thinking Workshops • Design for Scale & B2B SaaS Information Architecture & Design Systems • High- & Low-Fidelity Prototyping • UI Components, Pattern Libraries & Visual Design Language Responsive, Multi-Device & Mobile-First Design • Developer-Focused UX • Workflow Optimization • Accessibility & Inclusive Design UX Research • Usability Testing • A/B Testing • Customer Journey Mapping • Persona Development • Stakeholder Research Data Visualization & Dashboard Design • Onboarding Flows & PLG • Workflow Automation • AI-Powered Interfaces & Design Tooling PROFESSIONAL EXPERIENCE

Senior UX/UI Designer Apr 2022 – Jun 2025

Portside.co (Aviation): San Francisco, CA (Remote) Architected user-centric interfaces and cohesive design systems across web and mobile platforms, leading UX research through interviews, usability testing, and data analysis to drive iterative design and enhance user engagement.

• Drove strategic ideation in cross-functional brainstorming sessions, translating customer feedback into actionable design improvements that enhanced usability and retention.

• Propelled a 25% revenue increase by redesigning user flows that re-engaged all former users and acquired 150+ new high-value clients, including private aviation partners.

• Produced detailed wireframes, mockups, and interactive prototypes to communicate solutions and streamline collaboration with developers for seamless implementation.

• Championed continuous innovation by integrating emerging UX/UI trends and user behavior insights into the design process, driving product relevance and appeal.

• Mentored 2 junior designers, fostering a culture of design excellence through coaching in best practices, UX principles, and cross-functional collaboration.

• Contributed to securing $100M in company funding by delivering investor-ready product designs aligned with scalable business growth and user demand.

Senior UX/UI Designer Dec 2021 – Mar 2022

Multiplica (Design Agency): Barcelona, Spain (Remote) Engineered accessible, responsive web and mobile interfaces with high-fidelity, client-approved mockups that reinforced brand identity and elevated usability, inclusivity, and overall customer satisfaction.

• Collaborated with cross-functional teams to align project scope with strategic objectives while directing multiple design projects simultaneously, delivering high-quality outcomes under tight deadlines in dynamic environments.

• Outlined precise specifications for UI elements such as buttons, forms, and navigation components to streamline development and ensure consistent implementation.

• Built interactive prototypes, wireframes, and pixel-perfect mockups using Figma and Photoshop, aligning visual design with user goals and technical feasibility.

• Synthesized insights from user research and usability testing to consistently refine design strategies and eliminate interaction friction.

• Unified design elements through the development and maintenance of style guides/UI component libraries to ensure brand consistency. Senior UX/UI Designer Oct 2019 – Oct 2021

Emvelia.com - Artlimes.com ( SaaS): London, UK (Remote) Drove seamless design implementation by collaborating with cross-functional teams to ensure technical alignment, while enhancing user experience through user-centered design, research insights, and iterative refinement.

• Created wireframes, interactive prototypes, and high-fidelity mockups using Figma and Photoshop to support feature development and ensure seamless developer handoff.

•Defined and maintained comprehensive style guides and UI component libraries to ensure cohesive visual identity and functional consistency across digital touchpoints.

• Drove platform growth by helping onboard 1,000+ artists, with 90% adopting newly launched paid features enhanced by unified analytics across web and social media.

• Boosted overall sales by 30% through the implementation of data-informed UX improvements and high-impact design features.

• Contributed to strategic design reviews, ensuring every solution aligned with brand guidelines and broader product goals. Senior UX/UI Designer Dec 2016 – Oct 2019

iRepair.gr (Retail): Athens, Greece (Remote)

Designed intuitive, user-centered interfaces across digital platforms by developing wireframes, interactive prototypes, and high-fidelity mockups in Figma and Photoshop, continuously refining layouts using user feedback, analytics, and industry trends.

• Enabled business growth by contributing to a 23% increase in sales and supporting the expansion of retail operations from 18 to 34 locations through impactful design enhancements.

• Analyzed competitor offerings and emerging trends to inform feature improvements and maintain product relevance in a dynamic market.

• Contributed to cross-functional ideation sessions and competitive analysis to uncover user pain points and craft UX/UI solutions.

• Partnered with developers to ensure seamless translation of design specifications into functional, pixel-perfect user experiences.

• Established style guides and design systems to promote visual and functional consistency across all projects and platforms. Ecommerce Manager / UI Designer Sep 2012 – Dec 2016 Bettersport.gr (Retail): Athens, Greece

Directed daily team operations and cross-functional workflows, facilitating regular huddles and planning sessions to align goals, set priorities, and drive productivity and process efficiency across projects.

• Managed end-to-end eCommerce operations, directly contributing to a 200% increase in sales, enabling the launch of 4 new store locations and onboarding of 13 additional team members.

• Increased customer satisfaction by evaluating KPIs/operational data, identifying bottlenecks, and implementing process improvements.

• Designed and executed targeted training programs that elevated staff competencies, performance metrics, and career growth.

• Oversaw departmental budgets with precision, maintaining cost control while supporting strategic initiatives and resource needs.

• Monitored team performance, addressing challenges proactively to uphold service standards and maintain accountability.

• Mentored staff through individualized coaching, fostering professional development, team engagement, and high morale. Graphic Web Designer Sep 2007 – Dec 2012

Hotelrez.net Hotelrez.co.uk (Travel): London, UK (Remote) Developed visually engaging, user-centered, and responsive website layouts for travel and hospitality clients using Adobe Creative Suite, creating high- fidelity mockups and prototypes in Photoshop and Illustrator to ensure brand consistency and cross-functional communication.

• Researched emerging UX/UI trends and analyzed performance data to inform design strategies, enhance visual appeal, and boost user engagement across web platforms.

• Streamlined workflows by maintaining an organized digital asset library of reusable design elements to accelerate project turnaround and design consistency.

• Spearheaded platform adoption by onboarding 900+ hotels to the booking engine, driving user acquisition and expanding market reach.

• Liaised with marketing teams to develop cohesive branding and promotional materials in line with client goals and high brand visibility. EDUCATION

Associate of Arts in Graphic & Web Design, Integraphics: Athens, Greece Associate of Arts in Web Design, Middlesex University of London: London, UK Completed advanced coursework in design techniques and user experience (UX) research. CERTIFICATIONS

CERTIFICATIONS

Graphic & Web Design Certification, IEK Intergraphics: Athens, Greece TECHNOLOGY & TOOLS

Figma Sketch Adobe Creative Suite HTML/CSS Knowledge Zeplin Miro Jira Confluence Wireframes Motion Storyboarding Languages

English – Fluent Spanish – Fluent Greek – Native

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