Defining Impact

Design leadership is about more than visuals in design—it’s about measurable outcomes, strategic business value, and lasting positive change.

On this page, I showcase the tangible impact of my work as a UX Design Director, from user engagement and product satisfaction to business growth and team transformation.

Global Relay

Scaled design org for 20,000+ enterprise clients

Tasked with elevating user experience in a fast-growing, regulated environment, I led and expanded the design team, introduced design systems, embedded user-centred processes, accelerated feature delivery timelines, fostered stronger cross-team collaboration, and strengthened Global Relay’s reputation as a trusted leader in compliant enterprise communication solutions.

Kantan

Unified brand and product, driving 30% user growth

As Head of Design, I implemented a scalable design system and led the team through rapid expansion, delivering a unified experience that boosted weekly active users, enabled nationwide reach, and delivered a successful B2C and B2B product focusing on design strategy and design thinking.

To Vima Newspaper

Modernized Greece’s leading news platform

I led the creative and product redesign for tovima.gr’s centenary, delivering a user-friendly, modern news experience that honours the newspaper’s legacy and sets new digital standards.

Brill.app

Award-winning app, 200x faster note digitization

Co-founding and leading Brill.app, I directed product vision and UX for a small, agile team. Within less than a year of launch, Brill.app achieved remarkable recognition: Recognized by Apple as “New Apps We Love” and featured twice as “App of the Day”, voted “Product of the Day” on ProductHunt, gaining significant user traction, swarded the 2020 Innovation Award from Business Intelligence Group, successfully launched on both iOS (January 2019) and Android (December 2019) platforms

Tigerspike

Global brand transformation, award-winning solutions

After delivering recognised solutions for clients like Apple, Emirates, and the United Nations, I shaped Tigerspike’s vision and mentored teams across 10+ countries as Product Design Lead & Global Head of Brand. This transformation unified Tigerspike’s vision and brand, positioning the company as a trusted partner for digital transformation worldwide. It strengthened our creative culture, attracted top talent, and earned Tigerspike industry recognition for design excellence and thought leadership

Education Perfect

Brand and website redesign for global EdTech growth

As Design Director, I led the rebranding and website overhaul, aligning visual identity with business strategy to strengthen brand perception and support expansion into new markets.

United Nations WFP

Boosted efficiency in beneficiary

I focused on emotional connection and usability, enhancing user experience and increasing recurring donations to support WFP’s mission.

Intelligence

Enabled smarter, data-driven decisions

As Product Design Director, I led the design of a smart data visualisation product that empowered clients to act on insights, make informed decisions, and achieve measurable business outcomes.

Emirates Airline

Airline travel experience for the first Apple Watch

As a Product Designer, I helped Emirates explore their experience design for Apple’s first Watch, designing an app that delivered live travel updates, boarding notifications, and real-time flight information—setting a new standard for mobile travel convenience and earning global recognition at launch.

Thames Water

Digital transformation for the UK’s largest water utility

Serving as Product Design Lead, I worked with cross-functional teams to redesign digital customer services for Thames Water, improving user experience, accessibility, and operational efficiency for millions of customers across London and the Thames Valley.

Nassos Kappa is a product designer and design director. Have a project in mind? Let’s work together.