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Nicky Kaur S.
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Nicky Kaur S.

Senior Mobile App Developer | Flutter, React Native, Swift, Kotlin

I help startups and businesses launch mobile apps that don't need a rebuild six months after launch — built right the first time, in Flutter, React Native, or native Swift/Kotlin, whichever fits your product best. I'm a Senior Mobile App Developer with a 5.0-star rating across 22 projects, specializing in Flutter, React Native, iOS (Swift), and Android (Kotlin). Because I work natively as well as cross-platform, I can recommend the right technology for your product instead of forcing every project into the same stack — based on your requirements, existing codebase, performance needs, and long-term scalability. What I build: - Flutter & React Native apps, or native iOS/Android when performance demands it - Mobile MVPs and custom apps from Figma designs or a spec - Backend integrations — REST APIs, Firebase, Supabase, third-party APIs - Real-time features, chat, push notifications, auth & social login - In-app payments, subscriptions, maps & location features - App Store & Google Play deployment, app migrations & rebuilds - Bug fixing & performance optimization on existing apps Whether you have a complete spec, Figma designs, an existing codebase, or just an idea, I can help you plan and build the right mobile solution. 📩 If you're looking for a mobile developer who can handle both iOS and Android — and tell you honestly which stack fits your product — send me a message. I'll review your idea and suggest the best approach before you hire me.

🇬🇧Birmingham, United Kingdom$12/hr100% JSS5.00 (7)Since Jan 2019

Earnings and projects

MRR
$149

Last 6 months ÷ 6

World#123,551 / 412k
🇬🇧Country#2,524 / 10.7k
Revenue, last 30 days
$360

Last 6 months: $892

World#70,627 / 412k
🇬🇧Country#1,242 / 10.7k
Total earnings
$54k

Billed in all: $55k

World#71,886 / 412k
🇬🇧Country#1,613 / 10.7k
Per project
$2.3k

$99 in the last 6 months

World#68,535 / 412k
🇬🇧Country#1,365 / 10.7k
Projects, last 6 months
9

Across 11 contracts

82% fixed18% hourly
World#21,105 / 412k
🇬🇧Country#477 / 10.7k
Projects in all
23

Across 32 contracts

44% fixed56% hourly
World#120,400 / 412k
🇬🇧Country#3,186 / 10.7k

Earnings, last 30 days

$54.7k+$360 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$54.2k$54.4k$54.6k$54.8kOct 8Oct 23Nov 7

Skill rankings: Top 23% in Swift

Ranked by MRR among everyone on Upwork with the skill.

  1. #31App Feature Development66 freelancers · 🇬🇧 #1Top 47%
  2. #52App Marketplace156 freelancers · 🇬🇧 #1Top 33%
  3. #643Dart2,324 freelancers · 🇬🇧 #5Top 28%
  4. #744Kotlin3,021 freelancers · 🇬🇧 #13Top 25%
  5. #846Swift3,634 freelancers · 🇬🇧 #19Top 23%
  6. #867App Development2,592 freelancers · 🇬🇧 #14Top 33%
  7. #1,746REST API5,062 freelancers · 🇬🇧 #22Top 34%
  8. #1,846Supabase4,116 freelancers · 🇬🇧 #38Top 45%