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Yurii K.
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Yurii K.

Kustov Y. Web/Dev.

Title Top Full-Stack & Mobile Developer — Angular • Ionic • React • Node.js • Next.js Overview I’m Yuriy — a senior Full-Stack & Mobile engineer with 12+ years building high-impact web and mobile products. I deliver scalable real-time apps, IoT integrations, marketplaces, and polished hybrid/native-feeling mobile experiences. I combine deep frontend expertise (Angular, React, Ionic) with backend and SSR skills using Node.js and Next.js to turn ideas into production-ready apps that drive results. What I bring 7+ years delivering end-to-end web & mobile solutions Real-time apps, offline sync, push notifications, and IoT integrations Hybrid & cross-platform: Ionic v1–9, Capacitor, Cordova, Angular (AngularJS → Angular 18), React/Next.js Clean, testable TypeScript code and production-ready deployments Strong UI/UX focus and performance-first frontend architecture Core Technologies Frontend: Angular 2→18, TypeScript, JavaScript (ES6+), React, Next.js, MUI5, Tailwind, Redux Mobile: Ionic, Capacitor, Cordova Backend/Server: Node.js, Next.js (API routes, SSR) Build & Styling: SASS, CSS3, HTML5, Webpack, Vite, Gradle Patterns & Libraries: RxJS, MVVM/MVC/MVP Tools: Git, Jira, CI/CD, cross-timezone remote collaboration Selected Projects (short) Services Full product development Angular single-page apps & component libraries Hybrid mobile apps with Ionic + Capacitor/Cordova Next.js / Node.js APIs, server-side rendering, and performance optimization Real-time features, offline sync, and maintainability audits Why hire me Business-focused engineering aligning tech to KPIs Proactive communicator with milestone-driven delivery Reliable remote partner across time zones Call to Action Ready to build? Send your project brief, timeline, and goals — I’ll propose a clear plan and next steps.

🇵🇱Warsaw, Poland$40/hr100% JSS4.60 (1)Since May 2019

Earnings and projects

MRR
$6.2k

Last 6 months ÷ 6

World#3,681 / 412k
🇵🇱Country#52 / 2,852
Revenue, last 30 days
$6.7k

Last 6 months: $37k

World#3,255 / 412k
🇵🇱Country#46 / 2,852
Total earnings
$519k

Billed in all: $540k

World#2,530 / 412k
🇵🇱Country#49 / 2,852
Per project
$173k

$37k in the last 6 months

World#41 / 412k
🇵🇱Country#1 / 2,852
Projects, last 6 months
1
0% fixed100% hourly
World#128,092 / 412k
🇵🇱Country#866 / 2,852
Projects in all
3

Across 5 contracts

40% fixed60% hourly
World#304,140 / 412k
🇵🇱Country#2,233 / 2,852

Earnings, last 30 days

$540k+$6.7k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$530k$535k$540k$545kOct 8Oct 23Nov 7

Skill rankings: Top 2% in Ionic Framework

Ranked by MRR among everyone on Upwork with the skill.

  1. #10AWS Amplify524 freelancers · 🇵🇱 #1Top 2%
  2. #15AWS Application690 freelancers · 🇵🇱 #1Top 2%
  3. #18Ionic Framework1,184 freelancers · 🇵🇱 #1Top 2%
  4. #50Redux3,245 freelancers · 🇵🇱 #2Top 2%
  5. #108Angular6,816 freelancers · 🇵🇱 #4Top 2%
  6. #179Mobile App Development8,511 freelancers · 🇵🇱 #2Top 2%
  7. #207React Native10,486 freelancers · 🇵🇱 #2Top 2%
  8. #285Next.js15,954 freelancers · 🇵🇱 #2Top 2%