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Dmitriy S.
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Dmitriy S.

Full Stack Mobile Developer.

With a strong background in IT, I have developed a wide set of skills that I am eager to use to bring your projects to life. Whether you're a startup needing a minimum viable product (MVP) or an established company aiming to improve your digital presence, my services are tailored to achieve your goals efficiently and effectively. ◾️ What I Offer • Custom App Development: developing applications to meet unique business and user requirements • App Redesign & Optimization: enhance existing apps for better performance & user experience • Maintenance & Support: ongoing support for bug fixes, updates, and new feature integrations • Store Publishing Support: assistance with publishing your application on App Store or Google Play • Problem solving: finding and resolving technical challenges to make the development process more efficient. ◾️ Tech Stacks and Knowledge - Programming Languages: Swift, Kotlin, Java, Python - Cross-Platform Development: Kotlin Multiplatform, Decompose - UI Frameworks: UIKit/SwiftUI, AndroidX/Jetpack Compose - iOS specific libs: Alamofire, Swinject, Factory, Combine, RxSwift, Realm, Hero, Lottie - Android specific libs: Retrofit, Ktor, Hilt, Koin, Coroutines, LiveData, Rxjava3, Room, Realm, Picasso - Backend Technologies: Firebase, RESTful APIs, gRPC - Version Control & CI/CD: Git, GitHub, GitHub Actions, GitLab - Testing Tools: XCTest, Espresso, JUnit, Mockito - Design Tools: Figma, Adobe XD - Service integration: Firebase Cloud Messaging, Google Maps SDK, Firebase Crashlytics, Yandex Maps, Facebook - Other skills: Docker, Nginx, PostgreSQL, MS SQL, MySQL, Redis, RabbitMQ, MQTT, ElasticSearch

🇰🇿Aktobe, Kazakhstan$25/hr100% JSS5.00 (4)Since Apr 2020

Earnings and projects

MRR
$1k

Last 6 months ÷ 6

World#47,320 / 412k
🇰🇿Country#89 / 762
Revenue, last 30 days
—

Read daily since Oct 26, under 30 days

Total earnings
$14k

Billed in all: $14k

World#166,543 / 412k
🇰🇿Country#329 / 762
Per project
$2.1k

$6.1k in the last 6 months

World#75,498 / 412k
🇰🇿Country#173 / 762
Projects, last 6 months
1
100% fixed0% hourly
World#128,096 / 412k
🇰🇿Country#197 / 762
Projects in all
7
71% fixed29% hourly
World#236,191 / 412k
🇰🇿Country#473 / 762

Earnings, last 30 days

$14.4kNothing earned since Oct 26Billed in all, before Upwork's fee · drag across the chart to see what was earned in any stretch
$14.2k$14.4k$14.6k$14.8kOct 26Nov 2Nov 8

Tracked from Oct 26, 2026.

Skill rankings: Top 10% in Java

Ranked by MRR among everyone on Upwork with the skill.

  1. #6Offline Functionality32 freelancers · 🇰🇿 #1Top 19%
  2. #52Mobile App Improvement281 freelancers · 🇰🇿 #1Top 19%
  3. #75User Authentication698 freelancers · 🇰🇿 #2Top 11%
  4. #92Push Notifications851 freelancers · 🇰🇿 #1Top 11%
  5. #257Mobile App Testing1,834 freelancers · 🇰🇿 #1Top 14%
  6. #361Kotlin3,021 freelancers · 🇰🇿 #3Top 12%
  7. #446Swift3,634 freelancers · 🇰🇿 #3Top 12%
  8. #495iOS3,908 freelancers · 🇰🇿 #3Top 13%