Product Designer Gubenko Portfolio

Hey!
My name is Dmitrii Gubenko
I'm Senior Product Designer

Fintech • Payments • B2B / B2C • Complex Products • Design Systems • AI-assisted Product Design

I’m a Senior Product Designer with 9+ years of experience in fintech, crypto, SaaS, and complex digital products.

I specialize in complex interfaces — CRM systems, dashboards, back-office tools, mobile products, and products with sophisticated business logic.

I’m hands-on throughout the entire product design process: from understanding the problem and designing user flows to prototyping, final UI, design QA, and supporting implementation with engineering.

AI is an active part of my daily workflow, not just an occasional tool. I use AI extensively for research synthesis, requirements structuring, product exploration, UX writing, ideation, design critique, documentation, prototyping, and repetitive tasks. I’ve built practical workflows around ChatGPT, Claude, and other AI tools and know where AI can significantly accelerate product work — and where human judgment still matters.

Selected results

Increased registration conversion by 8%
Improved onboarding completion by 7%
Reduced churn in a key user flow by 5%
Reduced design iterations by 11%
Reduced design–development mismatches by 17%
Reduced design time by up to 13% through reusable systems and components

Core skills

Product Design & UX/UI
Complex interfaces: CRM, dashboards, back-office systems
User flows, information architecture & edge cases
Product discovery & UX research
Design systems & scalable UI patterns
Product analytics & hypothesis validation
Mobile & Web product design
AI-assisted product design workflows
Figma — advanced
Cross-functional collaboration with Product & Engineering

Key Projects

Maps.me

Designed the CarPlay experience, including navigation, search, map controls, and system states
Worked on Profile, Location Sharing, eSIM, Wallet, and Super App scenarios
Designed complex travel, fintech, and account-related user flows
Evolved reusable UX/UI patterns across multiple product areas
Worked with complex system states, technical limitations, and edge cases

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View Figma

B2Broker

Designed scalable mobile experiences for iOS and Android
Built and evolved a cross-platform design system aligned with platform guidelines
Designed complex dashboards, CRM, and back-office interfaces
Adapted product interfaces for multiple white-label clients
Worked closely with engineering from early concepts to production

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ERA Wallet

Designed a companion app for a hardware crypto wallet from concept to launch
Built and evolved the product design system
Designed wallet setup, security, transaction, and asset-management flows
Worked with complex security states and edge cases
Tested and iterated key scenarios based on user feedback

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View Figma

Ledger

Designed the DC Yield product for complex staking and DeFi scenarios
Worked directly with Product on product logic and key user flows
Designed financial flows with multiple states, constraints, and edge cases
Integrated new product scenarios into an established design system
Delivered solutions under tight product timelines

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GoDefi

Designed a DeFi product with limited existing market analogues
Translated complex DeFi mechanics into clear user flows and interfaces
Built and scaled a reusable component library
Conducted user research through in-depth interviews
Contributed to product positioning and visual direction
Validated product concepts through prototypes before implementation

View in Apple Store

Nitrogen Wallet Website

Designed a conversion-focused website for a DeFi wallet, translating a complex crypto product into a clear value proposition and simple acquisition flow.

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Redesign of conversation (Bothelp)

Redesigned a complex messaging workspace used to manage customer conversations, statuses, and user data.