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Valentyn S.
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Valentyn S.

Frontend Developer | React.js | Next.js | TypeScript | SEO & Multiling

Frontend Developer with 2+ years of commercial experience building modern web applications and websites using React.js, Next.js, TypeScript, and JavaScript. Since 2023, I have been working in frontend development, building responsive web applications, admin panels, interactive data tables, SEO-optimized websites, and multilingual interfaces. Currently, I work as a Frontend Developer in a product company, where I develop SEO-optimized and multilingual web applications. I collaborate with designers, backend developers, and QA engineers to deliver scalable, maintainable, and user-friendly solutions. My expertise includes: ▪ React.js, Next.js, TypeScript, JavaScript ▪ Responsive and pixel-perfect UI development ▪ SEO optimization and multilingual websites ▪ API integration and state management with Redux Toolkit ▪ Admin panels and data-driven interfaces ▪ Microservice-based project development ▪ Performance optimization and code refactoring ▪ Git, GitHub, and team collaboration workflows I focus on writing clean, reusable code and building products that are fast, reliable, and easy to maintain. Whether you need a new feature, bug fixes, UI implementation, or a complete frontend solution, I am ready to help.

🇺🇦Kyiv, Ukraine$30/hr100% JSSSince Oct 2023

Earnings and projects

MRR
$671

Last 6 months ÷ 3.8 months active (since Jul 2026)

World#65,515 / 412k
🇺🇦Country#2,682 / 14.3k
Revenue, last 30 days
$0

Last 6 months: $2.5k

Total earnings
$2.6k

Billed in all: $2.7k

World#312,308 / 412k
🇺🇦Country#11,888 / 14.3k
Per project
$2.6k

$1.3k in the last 6 months

World#63,645 / 412k
🇺🇦Country#3,411 / 14.3k
Projects, last 6 months
2

Across 3 contracts

0% fixed100% hourly
World#88,922 / 412k
🇺🇦Country#3,419 / 14.3k
Projects in all
1

Across 3 contracts

0% fixed100% hourly
World#360,675 / 412k
🇺🇦Country#13,083 / 14.3k

Earnings, last 30 days

$2.7kNothing earned since Oct 11Billed in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$2,650$2,700$2,750$2,800Oct 11Oct 25Nov 7

Tracked from Oct 11, 2026.

Skill rankings: Top 8% in Redux Thunk

Ranked by MRR among everyone on Upwork with the skill.

  1. #13Redux Thunk164 freelancers · 🇺🇦 #6Top 8%
  2. #358Redux3,245 freelancers · 🇺🇦 #91Top 11%
  3. #361GitHub2,823 freelancers · 🇺🇦 #31Top 13%
  4. #396Linux3,038 freelancers · 🇺🇦 #23Top 13%
  5. #705ExpressJS5,651 freelancers · 🇺🇦 #63Top 12%
  6. #758Git5,766 freelancers · 🇺🇦 #127Top 13%
  7. #1,480MongoDB10,865 freelancers · 🇺🇦 #151Top 14%
  8. #1,890MySQL14,472 freelancers · 🇺🇦 #207Top 13%