ABOUT
Profile
STAYU KASABOV
I design and scale product systems, translating business strategy into accessible and buildable interfaces.
I build design systems that close the gap between design and engineering, working with startup teams on prototyping, structured documentation and cross-functional handoffs to keep design intent intact through development .
As CPO and product designer at Planetaplay, Bulgaria's first fully integrated to a TV pipeline VOD/OTT platform, I owned product strategy, PRD definition, UX research, and brand identity, scaling the platform to 500,000+ registered users before a mobile operator acquired the user base and technology.
I bring hands-on context engineering and LLM prototyping experience, shown in Capcat, a dual-mode CLI/TUI tool I designed and built solo.
I'm looking for a senior product design role where I can embed in an established team and raise production quality.
Value
VALUE PROPOSITION
WHAT I BRING
Lead the transition from initial research to final execution. Define the logic behind the interface through user flows, heuristics, and technical vetting. Ensure the product is built on a foundation that is both user-centric, business aligned and technically viable and accessible to WCAG standards.
Focus on the 'how' as much as the 'what'. My expertise lies in creating seamless handoffs through precise documentation and an in-depth understanding of implementation constraints. Ensure that the design intent remains intact throughout the development cycle.
I use prototyping as a tool for validation, with a systemic approach to solve complex problems. Helping teams move from MVP to a scalable product without losing functional integrity.
Maintain a critical approach to new technology, adopting new workflows and tools only when they enhance production speed or product quality.
Services
WHAT THE ENGAGEMENT COVERS
STRATEGY
Product Direction
Clarifying what the product is, who it is for, and whether the answer is honest.
Product-Market Fit
Testing whether the problem being solved is real, urgent, and worth solving at all.
Business Alignment
Connecting product decisions to what the business actually needs to achieve.
RESEARCH + DESIGN
User Research
Finding out what real users do, need, and struggle with - not what they say they want.
UX Design
Flows, wireframes, and interaction logic - how the product behaves from the user's perspective.
Design System
A coherent component library that makes every future design decision faster and more consistent.
ARCHITECTURE +
Architecture
Defining the structural logic - what the product is made of and what comes in which order.
PRD Authoring
Writing requirements that define scope, constraints, and success before building begins.
Design Oversight
Senior judgment for teams with designers but no voice asking if the right problems are being solved.
Capabilities
CAPABILITY SET
Stack
TECH STACK
History
EXPERIENCE LOG
2022 — Present
Product Design (Independent Practice)
Stayux.com (Independent Practice) · Full-time
I lead end-to-end design and product strategy for client organizations, spanning brand design, design systems, and engineering handoff.
My approach combines systemic thinking with a modern design ecosystem - leveraging design systems, structured workflows, and strategic alignment to ensure scalability, consistency, and long-term brand coherence. I bridge the gap between design and development through meticulously documented handoffs, enabling seamless collaboration with engineering teams.
Core Responsibilities:
・Design Systems Building and Contribution
・Design Token Systems & Accessibility Audits
・Product Design
・UX Strategy
・UX Audit
・Building front-end-ready prototypes and technical documentation
・Brand Strategy & Identity Design
・Cross-Functional Design-to-Development Handoff
Focused on delivering measurable outcomes, I help organizations strengthen their digital presence, improve user engagement, and build robust, future-ready brand and design systems that scale across platforms.
2005 — 2022
Chief Executive Officer & Founder
Nuvizus Communications · Full-time
I led a full-service digital agency as product leader across UX, engineering, and delivery, serving high-impact clients in technology, entertainment, and media. My work covered the full product lifecycle: product strategy, user research, UX/UI design, information architecture, front-end collaboration, and software delivery, working with multidisciplinary teams of designers and developers on every project.
Key achievements:
・Designed and led the development of an early, proprietary CMS platform with multirole access control, granular permissions, and content workflow management.
・Successfully deployed for major brands and projects including ING Bank (Perperikon.bg), TV7, and Planeta.tv, enabling secure, scalable content management and streamlining digital operations for large media and organizations.
・Won a design contest for the e-signature portal b-trust.org (Bankservice/Borika), introducing UX design methodology to the Bulgarian market.
・As CPO and product designer, built Bulgaria's first integrated VOD platform, Planetaplay.com. I owned product strategy, SWOT and PRD definition, UX research, and brand identity, including a custom typeface. The platform launched shareable video and audio playlists and an early SPA built on AJAX/JSON with Nginx deployment. Scaled the platform to 500,000+ registered users before a mobile operator acquired the user base and tech stack.
・Designed, developed, and deployed web solutions and MVPs with ExpressionEngine.
・Managed client relationships and stakeholder communication across long engagements, on time and on budget, and exceeding quality expectations.