
Petr B
Senior Product Designer
Habilidades

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Portfólio
Experiência profissional
Product Designer
WEB3 • Período integral
Oct 2024 - Mar 2026 • 1 yr 5 mos
Cross-Chain Infrastructure Development Company. I worked on "Rewards Portal", a web B2C product designed to incentivise users to support and maintain the infrastructure. - Designed and scaled a B2C Rewards Portal, focusing on system growth and engagement, achieved MAU from ~2.5k to ~20k within 3 months. - Improved 30-day retention from 9% to 34% by introducing daily engagement mechanics and clearer progress visibility. - Reduced main task abandonment from ~62% to ~34% by clarifying task requirements, edge cases, and recovery paths. - Led product discovery through session analysis, surveys (~150 users), interviews, and funnel analytics (PostHog).
UX/UI Designer
Blockchain • Período integral
Jul 2023 - Jul 2024 • 1 yr
Led full-cycle design for two products: Sandbox (smart contract execution simulator) and zkSharding (real-time system analytics dashboard). Worked closely with developers, stakeholders, and marketing teams to translate complex cryptographic concepts into clear, usable digital tools. - Designed two products from scratch and (Sandbox & zkSharding), from product discovery and UX strategy to final UI and implementation. - Improved comprehension of complex blockchain concepts: Sandbox achieved 64% task completion and 24% error rate across key scenarios. - Created clear product visualizations and technical diagrams that were used in pitch decks, contributing to materials that helped secure two new investors. - Built a unified design system (60+ components), cutting design-to-dev delivery time −70%.
Senior Product Designer (AI, SaaS, Call Centre Software)
SaaS • Período integral
Apr 2021 - Jul 2023 • 2 yrs 3 mos
Worked as part of the core design team on a full-scale product redesign for a large CCaaS platform. Focused on improving usability, unifying UX patterns, reducing friction in critical billing and account flows, and supporting engineering through structured components and design documentation. - Personally owned Billing & Account flows, reducing time-on-task by ~37% through flow restructuring and information hierarchy. - Designed and shipped AI Call Transcription and Flow Builder from scratch — features that became key differentiators. - Improved SUS from ~10–15 to ~79 after usability testing and iterative redesign. - Design improvements contributed to NPS growth (+20+ points) by unifying UX patterns and system Feedback.