Kateryna

Kateryna Serdiuk
UX/UI Designer
E-mail: [відкрити контакти](див. вище в блоці «контактна інформація»)
LinkedIn: [відкрити контакти](див. вище в блоці «контактна інформація»)
Portfolio: https://serdiukdesign.framer.website

Summary
UX/UI Designer with experience in fintech, B2B SaaS and consumer mobile products. Work covers ownership from
problem framing and research through to shipped UI across iOS, Android and web. Experience with financial interfaces:
balances, payouts, card management, transaction history and portfolio data, including multi-step flows with several
states and permission levels. First degree in International Economic Relations, second a Master of Arts in Visual
Experience Design from the University of Europe for Applied Sciences in Germany. AI tools are used regularly for
prototyping and research synthesis
Education
03.2023 – 07.2024 University of Europe for Applied Sciences (Potsdam, Germany), Master of Arts: Visual Experience
Design
09.2017 – 07.2021 Alfred Nobel University (Dnipro, Ukraine), Bachelor of Business Administration: Economical relations
Professional Experience

01.2021 – present Upwork (Wordwide), Industry (Fintech, Saas)
UX/UI Designer, Fintech and SaaS Products
● Owning product design end-to-end for SaaS clients: from discovery, user research, and wireframes through
prototyping, high-fidelity UI, and implementation support.
● Partnering with founders, engineers and analysts on both sides of the handoff, from framing the problem
through to reviewing the screens that were actually built.
● Researching user behaviour through interviews and usability sessions, and bringing forward findings that
changed the direction of the work.
● Implementing design alongside engineers and presenting the reasoning behind decisions in reviews, so the
shipped product matches what was specified.
● Designing end-to-end flows for iOS, Android and web, and maintaining the design system in Figma
(components, variables, auto layout) as the products grow.
Achievements
● Cut development rework by validating all design solutions through user research and usability testing before
handoff to engineering.
● Delivered for clients across fintech, SaaS, and mobile products, adapting to different product contexts quickly
without dropping quality.
● Delivered design for 15+ clients across diverse industries.

09.2023- 11.2024 CleanBee (USA), Industry (Saas)
UX/UI Designer, Redesign of Mobile App, Web page, Banners, Flyers
● Created and implemented a comprehensive, scalable digital design system in Figma, leveraging advanced
Auto Layout, Variables, and Components to standardize the visual language across all platforms.
● Identified the steps where people dropped out of onboarding and booking, and rebuilding those steps around
what the analytics showed.
● Ran usability sessions on the redesigned flows and reviewed how they performed after release.
Achievements
● Design system cut handoff time and reduced back-and-forth with the dev team.
● Drove a 15% increase in key user actions through the strategic redesign of core flows, proving the direct
impact of design on business conversion goals.
● Delivered across all platforms on schedule without design rework, keeping quality consistent end to end.

07.2021-01.2022 Amazon (Czech Republic), Industry (Logistics)
UX Designer, Logistic platforms

● Created and implemented design solutions for online platforms to integrate complex data and improve the
visibility of logistics and transportation processes.
● Contributed to the UX design of a large-scale, internal enterprise platform, operating under strict corporate
guidelines and compliance requirements to ensure system-wide security and usability.
● Developed and coordinated internal tools and improved enterprise software by streamlining dense data sets
into intuitive, user-friendly dashboards.
● Prepared design specifications and conducted design handoff to developers, ensuring that every detail of the
user interface was documented for pixel-perfect implementation.
Achievements
• Gained a solid, practical understanding of front-end development principles through daily collaboration with
engineers, which significantly reduced development time and improved the quality of the final product.
• Transformed logistics workflows by creating data-driven visibility tools that helped users manage transportation
processes more effectively, reducing operational friction.

Professional skills
Soft Skills Technical
● Clear written and verbal communication ● End-to-End Product Design (Web, Mobile, SaaS)
● Systematic thinker ● Figma Expert (Variables, Auto Layout,
Components)
● Attention to detail & focus on the core design
elements ● Design System Architecture
● Fast learner, comfortable with new tools and ● Framer Development (No-Code & CMS)
contexts
● Adobe Illustrator (Vector & Iconography)
Language Skills
● Adobe Photoshop (Visual Compositing)
● English (full proficiency)
● AI-Assisted Workflow (Claude + configured agents,
● Czech (intermediate) Claude Code, UX Pilot, Figma AI, Midjourney)
● Ukrainian (Native) ● Data-Heavy Interfaces (Tables, Filters, Dense
States)
● Russian (Native)
● Typography & Grid Systems
● German (In progress)
● Interactive Prototyping (Lottie & Rive)
● UX Research & Heuristic Evaluation
● User Journey & Flow Mapping
● Front-End Principles (HTML/CSS, SCSS,
Bootstrap, Storybook)
● Accessibility Standards (WCAG Compliance)
● Data-Driven Design (A/B Testing & Conversions)
Certificates

10.2021 UX/UI Professional (Shendrikov school)
05.2024 UX Designer (Micro1)