Сергій

Serhii Lanchukovskyi
Product || UX/UI Designer

[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section)
SergiusDesign sergius-lanchukovskyi

Socks Expert LTD (LTE Socks product) • Product UX/UI Designer • 2025 - Present
Work Experience
Leading the UX/UI overhaul for the LTE Socks user dashboard and admin panel—making it easier
to use, more visually balanced, and consistent across the board

Building a unified design system that keeps all internal tools and client platforms visually aligned
and easier to update

Running UX research and diving into marketing data to guide design choices that actually boost
user engagement

Partnering closely with the developer and marketer to make sure everything looks great and
meets business goals

Planning a full website redesign to lift conversion rates and strengthen how people see the brand

Working remotely on solutions that revolve around LTE/4G/5G proxy infrastructure, online privacy,
high reliability, and smooth API integrations

MusConv (Product company) • Product UX/UI Designer • 2024 - 2025
Redesigned the main MusConv product, resulting in a 12% increase in conversions

Developed a scalable design system from scratch, covering the website, web app, desktop, and
mobile platforms

Designed complete App Store assets for MusConv and PuffStats mobile apps

Led end-to-end UX/UI design for PuffStats — a new mobile app for vape tracking and health
awareness

Boosted paid subscriptions for Audiomodify by designing and coding responsive HTML email
campaigns

Worked closely with developers and analysts to launch features efficiently and ensure consistency
across platforms

Conducted UX research, A/B testing, and conversion tracking to guide design decisions and
improve user engagement

JunFolio (Educational non-profit platform for juniors) • UX/UI Mentor • 2024 - Present
Mentored 10+ junior designers, helping them improve their UX/UI skills

and work on real client projects

Provided feedback on wireframes, design systems, and usability improvements

Helped mentees secure their first freelance clients through better portfolio presentation

Upwork • UX/UI Designer • 2022 - 2024
Worked on multiple freelance projects, including SaaS platforms, e-commerce websites, and
mobile applications

Conducted UX research, developed interactive prototypes, and designed UI for SaaS,

e-commerce, and mobile applications

Digisol Agency (Outsourcing company) • UX/UI Designer • 2021 - 2022
Conducted UX research and designed web/mobile applications

Created responsive and adaptive designs for various platforms

Collaborated with clients to improve product usability through testing and iteration

Hyuna International Ltd (Product company) • UX/UI Designer • 2017 - 2021
Conducted competitive analysis and developed wireframes and UI prototypes

Designed dashboards and widgets to improve user experience on multiple platforms

Led UX/UI design for the company’s key products, ensuring consistency across devices

Hyuna International Ltd (Product company) • Web Designer, Front-end • 2015 - 2017
Designed landing pages and developed front-end components using HTML, CSS, JavaScript

Created adaptive and cross-browser layouts for various devices

Utilized version control systems like Git for seamless teamwork

SEOKRUA (Product company) • Web Designer, HTML coder • 2014 - 2015
Coded responsive web interfaces using HTML/CS S

Processed images and optimized assets for web applications

Worked in a team on multiple company projects

Technical Skills
S kills
UX Skills : Wireframing, User Flows,
 Animation: Lottie, Jitter

UX Research, A/B Testing
Front-End: HTML, CSS
UI Skills: Design Systems, Interaction Design,
Prototyping

Tools: Figma, Photoshop, Illustrator, Webflow

Hard Skills
UX/UI Desig n
Prototyping

SaaS Design
Lottie Animation

Design Systems
Mobile & Web App Design

Interaction Design User Flows & Wireframing

Soft Skills
Problem-Solvin g
Attention to Detai l

Time Management
Leadership & Teamwork

Decision-Making Communication & Active Listening

harkiv National University of Radioelectronics • 2011 - 2012
Education K

Master's degree, Software engineer

Cybernetics and Technical College • 2006 - 2011
Bachelor's degree, Software engineer

English
Languages
A2 (Reading documentation, written communication)

Ukrainian
Native