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Sergei K.
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Sergei K.

UX/UI Product Designer | SaaS, AI Apps, Fintech, Healthcare, PropTech

Senior UX/UI product designer for SaaS, fintech, healthcare and real-estate platforms. Top Rated Plus, 100% Job Success, $200K+ earned. Open to long-term, full-time roles. I make complex, regulated products easier to use. Real results: a clinical workflow cut from 12 steps to 5 (−58%), passenger boarding time halved from 2:40 to 1:20, manual report data entry down 80% with AI document recognition, +40% customer satisfaction on a scheduling SaaS, +35% retention on a two-sided talent platform. I design with AI end to end: brief analysis, information architecture, clickable prototypes and ready HTML pages with Claude Code, Figma AI and Google Stitch, so your team can test the real flow in days. 10+ years · 70 client reviews · KYC and identity-verification flows, clinical dashboards, multi-device hospitality UX. Core expertise 👉 SaaS & Platforms: dashboards, CRM and internal tools for logistics and operations. 👉 Fintech: KYC and identity-verification flows, onboarding funnels, real-estate closing and transaction flows. 👉 Healthcare: pharmacovigilance dashboards, clinical workflows, telehealth apps. 👉 AI Products: AI document recognition, AI-assisted workflows, AI-built prototypes. 👉 Real Estate & E-commerce: listing and syndication platforms, luxury marketing sites, checkout UX. What I deliver: UX/UI design · web and mobile app design · SaaS dashboards · design systems · UX audits · user flows and wireframes · interactive prototypes · user research · developer-ready Figma handoff. I work well embedded in agency and product teams, from first call to final handoff. Hiring for a long-term role? Message me with your product and the hours you need. I'll reply within a day.

🇺🇦Rivne, Ukraine$45/hr100% JSS4.99 (70)Since Jun 2016

Earnings and projects

MRR
$467

Last 6 months ÷ 6

World#80,835 / 412k
🇺🇦Country#3,173 / 14.3k
Revenue, last 30 days
$0

Last 6 months: $2.8k

Total earnings
$198k

Billed in all: $205k

World#15,587 / 412k
🇺🇦Country#1,230 / 14.3k
Per project
$2.4k

$934 in the last 6 months

World#66,626 / 412k
🇺🇦Country#3,516 / 14.3k
Projects, last 6 months
3
0% fixed100% hourly
World#66,479 / 412k
🇺🇦Country#2,681 / 14.3k
Projects in all
82

Across 85 contracts

61% fixed39% hourly
World#35,676 / 412k
🇺🇦Country#1,660 / 14.3k

Earnings, last 30 days

$205kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$200.0k$202.5k$205.0k$207.5kOct 8Oct 23Nov 7

Skill rankings: Top 16% in Mobile UI Design

Ranked by MRR among everyone on Upwork with the skill.

  1. #13Figma AI50 freelancers · 🇺🇦 #4Top 26%
  2. #289Claude Code818 freelancers · 🇺🇦 #21Top 35%
  3. #299AI Agents877 freelancers · 🇺🇦 #15Top 34%
  4. #385User Flow1,972 freelancers · 🇺🇦 #104Top 20%
  5. #496UX Research2,772 freelancers · 🇺🇦 #103Top 18%
  6. #665Wireframing3,877 freelancers · 🇺🇦 #148Top 17%
  7. #669Mobile UI Design4,166 freelancers · 🇺🇦 #148Top 16%
  8. #903Mobile App Design5,198 freelancers · 🇺🇦 #182Top 17%