Сергій

Serhii Rieznyk
FULL-STACK UI-UX designer

Date of birth: 24/08/1984
Location: Khmelnytskyi, Ukraine
Phone: [open contact info](look above in the "contact info" section) (Telegram/WhatsApp)
Email: [open contact info](look above in the "contact info" section)
Website: https://rieznyk.pro/
Portfolio: www.behance.net/zzergio

PROFESSIONAL SUMMARY
Experienced Full-Stack UI/UX Designer with 16+ years in web and mobile design. Specialized in WordPress, Webflow, and Opencart, creating user-friendly, conversion-optimized solutions. Expertise in prototyping, UI, mobile app design and front-end development. Delivered over 150+ projects. Passionate about combining aesthetics with functionality to deliver high-quality digital experiences.

WORK EXPERIENCE

QUICK TOUCH SYSTEMS (2024 – present) | Latvia/Estonia

Web and mobile app for restaurants B2B

ROLE: Product Designer, UI-UX Designer
• Designed the logic and UI for a B2B restaurant app, enhancing user experience
• Improved branding and created new presentation materials
• Optimized UI/UX, increasing conversion rates by 25%
• Daily collaboration with developers and stakeholders

WEB-SYSTEMS SOLUTIONS & QUOTIDIAN (2020 – 2023) | Ukraine & Chile

Webstudio & Startup

ROLE: Product Designer, UI-UX Designer, WordPress Developer
• Designed a mobile app for market research in South America
• Built a WordPress website analyzing public opinion trends and level of hatred using AI
• Created promotional videos and interactive presentations (Adobe After Effects)
• Delivered over 15+ projects on WordPress & Webflow under tight deadlines
• Pioneered the adoption of Webflow development

CURSOR (2009 – 2020) | Ukraine

Webstudio

ROLE: UI-UX Designer, WordPress Developer, Co-founder
• As an Art Director, managed a small team of designers and oversaw developers to ensure design-consistent project implementation
• Migrated company’s development from 1C-Bitrix to WordPress, improving project scalability
• Created branding for the studio, increasing brand recognition
• Won Web Awards Ukraine for outstanding web design projects
• Designed websites of various complexity
• Created wireframes and prototypes for web applications
• Managed projects and client communication
• Developed front-end layouts using HTML/CSS
• Delivered over 50+ projects on WordPress

DNL (2008 – 2009) | Ukraine

Web portal

ROLE: Web Designer, Content Manager
• Implemented a JavaScript script that enabled the use of background images and internal navigation within a mini-site
• Introduced new development and page unification standards, reducing the mini-site development time by 3 times
• Designed mini-sites and HTML/CSS layouts
• Managed and updated portal content

NEW WORLD (2007 – 2008) | Ukraine

Printing company

ROLE: Graphic Designer, Prepress operator
• Designed corporate branding, POS materials, and packaging
• Prepared layouts for offset printing

SKILLS & EXPERTISE
• UI/UX Design: Usability Testing, Wireframing, Prototyping, Design Systems & Atomic Design principles
• Web & Mobile App Design: Responsive & Adaptive Design, Accessibility - WCAG
• Front-End Development: HTML, CSS, JavaScript, WordPress, Webflow, Opencart
• Branding & Graphic Design: Logos, Presentations, Motion Graphics

TOOLS & TECHNOLOGIES
• Design: Figma, Adobe Photoshop, Adobe Illustrator, Adobe After Effects
• Development: HTML, CSS, Webflow, WordPress, GitHub (Basics)
• AI & Automation: ChatGPT, DALL-E, Code Copilot

EDUCATION & CERTIFICATIONS
• Bachelor’s Degree in Electrical Engineering, Donetsk National Technical University (2001–2006)
• Front-End Development Certification, Circle Academy, Khmelnytskyi (2019)

LANGUAGES
• English: Fluent
• Spanish: A2
• Ukrainian: Native

INTERESTS
Football, Chess, Cycling, Theater, Geoguessr, Postal Stamps

Looking for a UI/UX Designer who combines design and development to build impactful digital experiences? Let’s connect!