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Asim O.
Expert-Vetted

Asim O.

Senior Flutter Developer | Mobile Apps | AI-Assisted Engineering

🚀 Senior Flutter Developer with 12+ years in software engineering and 6+ years building production Flutter apps for iOS and Android. I help companies build, improve, and ship reliable mobile products — from architecture and development to App Store & Google Play release. Whether you're starting a new product, scaling an existing app, or need someone to take ownership of a complex Flutter codebase, I can step in and handle the mobile side end-to-end. 📱 WHAT I CAN HELP YOU WITH • Flutter & Dart development for iOS and Android • MVPs and production-ready applications • Existing app takeover, refactoring & modernization • Clean Architecture, BLoC/Cubit & Riverpod • REST APIs, WebSockets, Supabase & Firebase • Offline-first apps with Drift / SQLite • Authentication, social login & deep linking • Push notifications • Subscriptions & in-app purchases • Native integrations with Swift, Kotlin & platform channels • Performance optimization, crashes, jank & memory issues • Unit, widget, integration & golden testing • CI/CD, App Store & Google Play releases 🤖 AI-ASSISTED ENGINEERING I use Claude Code, Cursor, custom AI workflows, subagents and MCP integrations throughout planning, implementation, testing, refactoring, debugging and code review. AI helps me deliver faster — while architecture, technical decisions, code quality and production responsibility remain under my control. My workflow includes project-specific AI rules, custom commands and skills, automated testing, CI quality gates, and integrations with tools such as Figma, GitHub, Supabase and Flutter/Dart. 🧠 PROVEN EXPERIENCE Most recently, I took two Flutter applications from an empty repository to beta as the only mobile engineer — owning architecture, implementation, backend integration, testing and delivery. I’ve also worked on a high-scale real-time Flutter product involving offline-first architecture, WebSockets, native SDK integrations, performance optimization and production monitoring. I bring 2+ years of technical leadership experience, leading teams of 4–6 engineers across architecture decisions, mentoring, code reviews, planning and delivery. 📩 LET'S BUILD If you need a senior Flutter engineer who can understand your product, make strong technical decisions and take ownership from development to release, send me a message and tell me what you're building.

🇺🇦Lviv, Ukraine$35/hr100% JSS4.96 (7)Since Jul 2017
GlobeUpwork

Earnings and projects

MRR
$788

Last 6 months ÷ 6

World#58,625 / 412k
🇺🇦Country#2,449 / 14.3k
Revenue, last 30 days
$834

Last 6 months: $4.7k

World#48,601 / 412k
🇺🇦Country#1,940 / 14.3k
Total earnings
$20k

Billed in all: $21k

World#141,358 / 412k
🇺🇦Country#6,995 / 14.3k
Per project
$2.5k

$2.4k in the last 6 months

World#65,294 / 412k
🇺🇦Country#3,473 / 14.3k
Projects, last 6 months
2
50% fixed50% hourly
World#88,918 / 412k
🇺🇦Country#3,419 / 14.3k
Projects in all
8
63% fixed37% hourly
World#223,560 / 412k
🇺🇦Country#8,901 / 14.3k

Earnings, last 30 days

$20.9k+$834 earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$20.0k$20.5k$21.0kOct 8Oct 23Nov 7

Skill rankings: Top 13% in AI Copilot Development

Ranked by MRR among everyone on Upwork with the skill.

  1. #4AI Copilot Development31 freelancers · 🇺🇦 #1Top 13%
  2. #37AI Architecture122 freelancers · 🇺🇦 #6Top 30%
  3. #91Mobile App Bug Fix453 freelancers · 🇺🇦 #8Top 20%
  4. #236Claude Code818 freelancers · 🇺🇦 #15Top 29%
  5. #243AI Agents877 freelancers · 🇺🇦 #12Top 28%
  6. #301Dart2,324 freelancers · 🇺🇦 #23Top 13%
  7. #456App Development2,592 freelancers · 🇺🇦 #48Top 18%
  8. #567iOS3,908 freelancers · 🇺🇦 #71Top 15%