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David T.
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David T.

Developer Android, Kotlin, Java, Flutter (Android/iOS), Android TV

⚡Senior Android Developer with 14+ years of experience building, maintaining, and scaling production mobile applications. Certified with the Kotlin Professional Certificate by JetBrains. Specialized in Kotlin, Jetpack Compose, MVVM + Clean Architecture, Flutter, Coroutines + Flow, Hilt, Room Database, Supabase, Compose Navigation, AI-Assisted Development (ChatGPT, Gemini, Claude Code, GitHub Copilot), and Kotlin Multiplatform. 💼 During the last five years, I worked full-time on a long-term Android project for a US-based company, building and maintaining production mobile applications. This experience strengthened my expertise in large-scale codebases, long-term product maintenance, performance optimization, and delivering reliable applications for production environments. 🌐 Strong experience developing high-quality Android apps focused on performance, scalability, clean architecture, and great user experience. I have worked on long-term projects involving app maintenance, feature development, API integrations, bug fixing, Play Store releases, and production support. 🔹Technical Skills: Kotlin, Jetpack Compose, Java Flutter & Dart Kotlin Coroutines, StateFlow, MVVM, Clean Architecture Kotlin Multiplatform (KMP) REST APIs, Firebase, Push Notifications Android SDK, Material 3, Navigation Compose 🔹Development Tools: Android Studio, VS Code GitHub, GitLab, Bitbucket Jira, Trello, Asana, Redmine, Basecamp 🔹AI-Assisted Development I use modern AI development tools such as ChatGPT, Claude Code, Gemini, and GitHub Copilot to accelerate development, debugging, refactoring, and code reviews while maintaining clean, maintainable, and production-ready code. I have extensive experience collaborating remotely with international teams, participating in code reviews, improving existing codebases, and delivering stable mobile applications used in production environments. 🔹Available for: Android app development App maintenance & bug fixing Jetpack Compose migration MVP development API integrations Long-term mobile projects

🇵🇪Lima, Peru$25/hr100% JSS4.82 (140)Since May 2009

Earnings and projects

MRR
$1k

Last 6 months ÷ 6

World#47,355 / 412k
🇵🇪Country#112 / 790
Revenue, last 30 days
$3.5k

Last 6 months: $6.1k

World#10,149 / 412k
🇵🇪Country#28 / 790
Total earnings
$433k

Billed in all: $449k

World#3,789 / 412k
🇵🇪Country#8 / 790
Per project
$2.1k

$408 in the last 6 months

World#73,353 / 412k
🇵🇪Country#143 / 790
Projects, last 6 months
15

Across 17 contracts

82% fixed18% hourly
World#9,890 / 412k
🇵🇪Country#15 / 790
Projects in all
203

Across 234 contracts

38% fixed62% hourly
World#9,726 / 412k
🇵🇪Country#10 / 790

Earnings, last 30 days

$449k+$3.5k earned in the last 30 daysBilled in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$444k$446k$448k$450kOct 8Oct 23Nov 7

Skill rankings: #1 in 1 skill of 20

Rarest: top 6% in Room, of 53. Ranked by MRR among everyone on Upwork with the skill.

  1. 1ATV2 freelancers · 🇵🇪 #1Top 50%
  2. 3Room53 freelancers · 🇵🇪 #1Top 6%
  3. #5Coroutine57 freelancers · 🇵🇪 #1Top 9%
  4. #22Google Play282 freelancers · 🇵🇪 #1Top 8%
  5. #24GPT-4264 freelancers · 🇵🇪 #1Top 9%
  6. #44SQLite680 freelancers · 🇵🇪 #1Top 6%
  7. #76Android SDK805 freelancers · 🇵🇪 #1Top 9%
  8. #82Unit Testing669 freelancers · 🇵🇪 #1Top 12%