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Artem K.

Artem K.

React Developer | React & Next.js | Front-End Development | React.js

I'm a React and Next.js front-end developer with 5+ years building production-grade applications for iGaming, fintech, SaaS, and e-commerce. I build React interfaces that are fast, typed, and maintainable by the next developer who touches them - and I treat every project as a business problem first, not just a coding task. Before I write a single line of code, I want to understand what success looks like for you - whether that's improving retention, increasing conversions, or shipping faster without the usual mess. Technical decisions follow from that. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏆 𝗞𝗲𝘆 𝗥𝗲𝘀𝘂𝗹𝘁𝘀 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ Built the React front-end for an RTB/AdTech dashboard adopted by 20+ users managing $10M+ monthly ad budget ▸ Delivered a crypto iGaming React front-end covering KYC flows, wallet views, and a full operations backoffice ▸ Built a B2B SaaS platform with a Next.js front-end dashboard and mobile app used daily by field staff across multiple locations ▸ Shipped a React front-end for a financial advisors platform with onboarding flows, analytics dashboards, and a full admin console ▸ Delivered a React front-end mortgage broker CRM in daily production use for 1+ year with zero downtime migrations ▸ Built a multi-dealer marketplace React front-end with complex search, ranking UI, and multi-vendor checkout ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚡ 𝗪𝗵𝗮𝘁 𝗜 𝗕𝘂𝗶𝗹𝗱 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ I work across the full range of what modern React front-ends need. React and Next.js applications with server-side rendering, complex state management, and real-time WebSocket updates. TypeScript-first codebases with clean component architecture that scales without accumulating debt. Data-heavy dashboards using TanStack Query and TanStack Table with server-side filtering, pagination, and export-ready views. Clean REST and GraphQL API integrations wired into every layer. Responsive HTML5 and CSS layouts that work across every device and screen size - built right the first time. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🛠️ 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ React — 6 years ▸ TypeScript — 6 years ▸ Next.js — 4 years ▸ JavaScript — 8 years ▸ Node.js — 5 years ▸ TanStack Query / TanStack Table — 3 years ▸ Redux / Zustand — 5 years ▸ Vue.js — 3 years ▸ PostgreSQL / MongoDB — 4 years ▸ REST & GraphQL APIs — 6 years ▸ HTML5 / CSS3 / Tailwind — 6 years ▸ AWS — 3 years ▸ Expo / React Native — 5 years ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ‼️ Hire Me If You Need ‼️ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▸ A React developer who owns complex front-end architecture from design to deployment ▸ A Next.js front-end with SSR, real-time data, and production-grade performance ▸ A React front-end for iGaming or fintech with compliance-aware UI and real-time data handling ▸ A TypeScript React codebase your team can maintain, extend, and hand off without pain ▸ A senior developer to audit, refactor, and rescue a front-end that has grown hard to maintain If your React front-end is underperforming, overdue for a rebuild, or you just need someone who can own it properly from day one - send me a message and I'll take a look within 24 hours. 📩

🇺🇦Kryvyy Rih, Ukraine$20/hr100% JSS5.00 (3)Since Jan 2026
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Earnings and projects

MRR
$165

Last 6 months ÷ 5.7 months active (since May 2026)

World#119,796 / 412k
🇺🇦Country#4,416 / 14.3k
Revenue, last 30 days
$0

Last 6 months: $938

Total earnings
$948

Billed in all: $1k

World#397,754 / 412k
🇺🇦Country#13,972 / 14.3k
Per project
$316

$313 in the last 6 months

World#226,436 / 412k
🇺🇦Country#9,169 / 14.3k
Projects, last 6 months
3
33% fixed67% hourly
World#66,479 / 412k
🇺🇦Country#2,681 / 14.3k
Projects in all
3

Across 5 contracts

20% fixed80% hourly
World#304,140 / 412k
🇺🇦Country#11,447 / 14.3k

Earnings, last 30 days

$1kNothing earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$1,000$1,020$1,040$1,060Oct 8Oct 23Nov 7

Skill rankings: Top 17% in Redux

Ranked by MRR among everyone on Upwork with the skill.

  1. #207Expo.io581 freelancers · 🇺🇦 #13Top 36%
  2. #564Redux3,245 freelancers · 🇺🇦 #112Top 17%
  3. #1,782Vue.js8,267 freelancers · 🇺🇦 #227Top 22%
  4. #1,928CSS 39,914 freelancers · 🇺🇦 #245Top 19%
  5. #2,349Front-End Development8,892 freelancers · 🇺🇦 #239Top 26%
  6. #2,406MongoDB10,865 freelancers · 🇺🇦 #190Top 22%
  7. #2,416Mobile App Development8,511 freelancers · 🇺🇦 #171Top 28%
  8. #2,666React Native10,486 freelancers · 🇺🇦 #190Top 25%