I design the digital backbone of useful software.
Product Design Lead & UX Strategist with 15+ years of experience crafting complex enterprise, consumer, and cross-platform digital ecosystems.
Recently relocated to the SF Bay Area after leading product design for smart buildings and complex end-to-end platforms bridging digital and physical spaces.
I specialize in translating high-level business strategy into seamless user experiences, leveraging AI-powered workflows to accelerate the path from concept to delivery.
- 21
- years designing
- 15
- years in UX/UI
- 8
- YEARS AS PRODUCT OWNER
Speaking. Teaching. Building the community.
Design is not just the projects. It's the room, the students, the peers you help reach the next role.
Conferences
Speaking at international product and service design gatherings — most notably the Service Design Global Conference (SDGC), the flagship event of the Service Design Network that brings together practitioners from around the world to shape the future of the discipline. Talks focus on design leadership, smart-building UX, and how enterprise design teams grow from craft function to strategic driver.
My experience, in years.
Overlapping because roles compound — you don't stop being a designer when you become a product owner.
Certifications, skills, education, and the tools I actually open every day.
János = John Sarkantyú = Spur
A full Eastern-European name stacked with consonants is a small tax on every introduction. So same person, easier handle: JohnnySpur. The design work underneath doesn't change; only the label gets kinder to English-speaking colleagues.
Words people I've worked with kept saying.
Anonymised. Roles preserved. Written exactly as offered.
“Energizing and motivating personality.”
“Focusing on delivering the highest standards.”
“Diplomat-like communication skills.”
“Puts extra effort in taking ownership.”
“Amazing mediatory skills between stakeholders.”
“Strict and kind at the same time.”
“Super structured and thorough.”
“Always focusing on his professional development.”
“Proactively asks and gives feedback.”
“Treats everyone fairly and respectfully.”
“Fulfils promises and delivers on time.”
“His can-do attitude inspires others.”