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
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $6.1k
Billed in all: $449,102$449k
$408 in the last 6 months
Across 17 contracts
Across 234 contracts
Earnings, last 30 days
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.
- ATV2 freelancers · 🇵🇪 #1Top 50%🇵🇪#1 of 1
- Room53 freelancers · 🇵🇪 #1Top 6%🇵🇪#1 of 1
- #5Coroutine57 freelancers · 🇵🇪 #1Top 9%🇵🇪#1 of 1
- #22Google Play282 freelancers · 🇵🇪 #1Top 8%🇵🇪#1 of 1
- #24GPT-4264 freelancers · 🇵🇪 #1Top 9%🇵🇪#1 of 1
- #44SQLite680 freelancers · 🇵🇪 #1Top 6%🇵🇪#1 of 2
- #76Android SDK805 freelancers · 🇵🇪 #1Top 9%🇵🇪#1 of 2
- #82Unit Testing669 freelancers · 🇵🇪 #1Top 12%🇵🇪#1 of 1