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Denys H.
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Denys H.

React & Capacitor Developer | Web-to-Mobile Apps | 11+ Years

I help businesses turn existing React and Angular web products into production iOS and Android apps with Capacitor, then maintain and improve them over time. I bring 11+ years of experience across software development and application delivery. I can take ownership of your mobile app, from reviewing the existing codebase and planning the first release to native integrations, store submissions, and ongoing development alongside your backend and design team. Relevant experience: • Led the development and launch of a React + Capacitor app that reached 1M+ installs and 130,000 active users. • Built internal tooling used to create or update around 1,000 iOS and Android applications. • Contributed to a platform serving 40,000+ B2B clients and 15M monthly active users. • Delivered features across React web and React Native/Expo apps, including WebView bridges, authentication flows, API migrations, and production monitoring. How I can help: • Convert an existing web product into iOS and Android apps with Capacitor, adapting navigation and layouts for mobile. • Add push notifications, deep links, authentication, and integrations with native SDKs and APIs. • Develop custom Capacitor/Cordova plugins and maintain existing hybrid apps. • Set up reliable builds and releases with fastlane, GitHub Actions, GitLab CI, or Bitrise, and handle App Store and Google Play submissions. • Continue developing features, fixing bugs, improving performance, and monitoring releases after launch. Core stack: React, Angular, TypeScript, Capacitor, Cordova, React Native, Expo/EAS, Firebase, and Sentry. I'm available for long-term, part-time collaboration of around 20 hours per week. We can start with a paid codebase review and agree on a practical plan for your first mobile release or the next stage of development.

🇵🇱Krakow, Poland$60/hr100% JSS5.00 (1)Since Oct 2024

Earnings and projects

MRR
$859

Last 6 months ÷ 6

World#54,797 / 412k
🇵🇱Country#411 / 2,852
Revenue, last 30 days
$3.7k

Last 6 months: $5.2k

World#9,085 / 412k
🇵🇱Country#122 / 2,852
Total earnings
$12k

Billed in all: $13k

World#180,769 / 412k
🇵🇱Country#1,402 / 2,852
Per project
$2.4k

$1.7k in the last 6 months

World#66,528 / 412k
🇵🇱Country#643 / 2,852
Projects, last 6 months
3

Across 4 contracts

0% fixed100% hourly
World#66,479 / 412k
🇵🇱Country#465 / 2,852
Projects in all
5

Across 8 contracts

38% fixed62% hourly
World#266,042 / 412k
🇵🇱Country#1,973 / 2,852

Earnings, last 30 days

$12.7k+$3.7k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$8k$10k$12k$14kOct 8Oct 23Nov 7

Skill rankings: Top 8% in Ionic Framework

Ranked by MRR among everyone on Upwork with the skill.

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  4. #100Ionic Framework1,184 freelancers · 🇵🇱 #2Top 8%
  5. #118Expo.io581 freelancers · 🇵🇱 #3Top 20%
  6. #224Hybrid App Development1,431 freelancers · 🇵🇱 #5Top 16%
  7. #517CI/CD3,691 freelancers · 🇵🇱 #19Top 14%
  8. #858Angular6,816 freelancers · 🇵🇱 #13Top 13%