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Umang H.
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Umang H.

Senior React.js Next.js TypeScript NodeJs SaaS Claude AI Developer

I’m a Senior React and Next.js Developer with 6+ years of experience building production SaaS platforms, dashboards, workflow-driven applications, and consumer-facing web products. I help teams turn Figma designs and evolving APIs into fast, responsive, maintainable React applications. I can work independently in an existing codebase, improve UI quality without unnecessary rewrites, and deliver features through clear, reviewable milestones. What I can help you build: • React, Next.js, TypeScript, and modern responsive UI • SaaS dashboards, admin panels, multi-step forms, and complex workflows • Reusable component libraries, Storybook, design systems, and pixel-accurate Figma implementation • REST/GraphQL API integration, authentication, validation, loading and error states • Node.js APIs, PostgreSQL, Supabase, Prisma, and full-stack product development • Testing with Jest and React Testing Library, Git-based PR workflows, and production debugging Selected experience: • Foxit DMS — React/Next.js frontend modules, Storybook, and enterprise document-management workflows • VerifyTrusted — multi-tenant SaaS dashboards, embeddable widgets, and external API integrations • Kalshi — data-heavy TypeScript product with interactive, high-performance UI • H-Line Mfg — responsive frontend implementation • Meera Shantivanam — booking and user-facing workflow experience • VinoVoss — consumer-facing web product My approach is straightforward: understand the existing product and API contracts, break work into small deliverables, build clean reusable components, test important flows, and communicate progress clearly. If you need a reliable React/Next.js developer for a SaaS product, API integration, frontend improvements, or a new workflow-driven application, I’d be happy to help. I use AI-assisted development tools for faster codebase exploration, debugging, test scaffolding, and repetitive implementation, while personally reviewing architecture, business logic, and final code quality.

🇮🇳Surat, India$16/hr100% JSS4.88 (17)Since Nov 2022
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Earnings and projects

MRR
$4.4k

Last 6 months ÷ 6

World#6,661 / 412k
🇮🇳Country#785 / 45.9k
Revenue, last 30 days
$4.4k

Last 6 months: $27k

World#6,872 / 412k
🇮🇳Country#789 / 45.9k
Total earnings
$97k

Billed in all: $102k

World#40,348 / 412k
🇮🇳Country#6,466 / 45.9k
Per project
$5.1k

$27k in the last 6 months

World#33,931 / 412k
🇮🇳Country#3,768 / 45.9k
Projects, last 6 months
1
0% fixed100% hourly
World#128,092 / 412k
🇮🇳Country#14,379 / 45.9k
Projects in all
19
16% fixed84% hourly
World#138,388 / 412k
🇮🇳Country#19,771 / 45.9k

Earnings, last 30 days

$102k+$4.4k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$97.5k$100.0k$102.5kOct 8Oct 23Nov 7

Skill rankings: Top 1% in Payment Gateway

Ranked by MRR among everyone on Upwork with the skill.

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  5. #238SaaS Development5,201 freelancers · 🇮🇳 #58Top 5%
  6. #271MongoDB10,865 freelancers · 🇮🇳 #60Top 2%
  7. #309MySQL14,471 freelancers · 🇮🇳 #37Top 2%
  8. #323AI Development5,878 freelancers · 🇮🇳 #71Top 5%