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Oleksandr S.
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Oleksandr S.

Senior React & Next.js Developer | TypeScript, Node.js

I build and improve production web applications with React, Next.js, TypeScript, and Node.js. With 10+ years of software development experience and 100+ completed projects, I help teams ship maintainable features, solve performance issues, and build reliable frontend architecture. Relevant results: - Reduced a Next.js application's load time by 45% - Built a custom WordPress plugin supporting 10K+ daily users - Developed a React dashboard used by 5+ enterprise clients What I can help with: - React and Next.js application development - TypeScript, state management, and API integration - Frontend architecture, performance optimization, and responsive UI - Debugging, refactoring, and maintaining existing applications - Automated testing and production-quality code I also have extensive WordPress experience, including custom themes, plugins, and PHP enhancements. I take ownership of the work beyond implementation, with a focus on maintainability, clear communication, and solutions that fit the existing codebase. If you have an existing application to improve or a new feature to build, let's discuss the technical requirements.

🇺🇦Lviv, Ukraine$40/hr100% JSS4.91 (91)Since Sep 2014

Earnings and projects

MRR
$62

Last 6 months ÷ 6

World#146,483 / 412k
🇺🇦Country#5,288 / 14.3k
Revenue, last 30 days
$424

Last 6 months: $371

World#66,972 / 412k
🇺🇦Country#2,549 / 14.3k
Total earnings
$317k

Billed in all: $326k

World#6,950 / 412k
🇺🇦Country#606 / 14.3k
Per project
$3k

$185 in the last 6 months

World#55,741 / 412k
🇺🇦Country#3,018 / 14.3k
Projects, last 6 months
2
0% fixed100% hourly
World#88,918 / 412k
🇺🇦Country#3,419 / 14.3k
Projects in all
106

Across 111 contracts

41% fixed59% hourly
World#25,688 / 412k
🇺🇦Country#1,190 / 14.3k

Earnings, last 30 days

$326k+$424 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$325,250$325,500$325,750$326,000Oct 8Oct 23Nov 7

Skill rankings: Top 16% in Redux Thunk

Ranked by MRR among everyone on Upwork with the skill.

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  2. #26Redux Thunk164 freelancers · 🇺🇦 #12Top 16%
  3. #86Jest412 freelancers · 🇺🇦 #15Top 21%
  4. #226Cypress712 freelancers · 🇺🇦 #28Top 32%
  5. #296SCSS1,459 freelancers · 🇺🇦 #72Top 20%
  6. #686Redux3,245 freelancers · 🇺🇦 #132Top 21%
  7. #911GraphQL3,403 freelancers · 🇺🇦 #74Top 27%
  8. #2,043REST API5,062 freelancers · 🇺🇦 #134Top 40%