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
Earnings and projects
Last 6 months ÷ 6
Read daily since Oct 26, under 30 days
Billed in all: $14,441$14k
$6.1k in the last 6 months
Earnings, last 30 days
Tracked from Oct 26, 2026.
Skill rankings: Top 10% in Java
Ranked by MRR among everyone on Upwork with the skill.
- #6Offline Functionality32 freelancers · 🇰🇿 #1Top 19%🇰🇿#1 of 1
- #52Mobile App Improvement281 freelancers · 🇰🇿 #1Top 19%🇰🇿#1 of 2
- #75User Authentication698 freelancers · 🇰🇿 #2Top 11%🇰🇿#2 of 5
- #92Push Notifications851 freelancers · 🇰🇿 #1Top 11%🇰🇿#1 of 1
- #257Mobile App Testing1,834 freelancers · 🇰🇿 #1Top 14%🇰🇿#1 of 2
- #361Kotlin3,021 freelancers · 🇰🇿 #3Top 12%🇰🇿#3 of 17
- #446Swift3,634 freelancers · 🇰🇿 #3Top 12%🇰🇿#3 of 23
- #495iOS3,908 freelancers · 🇰🇿 #3Top 13%🇰🇿#3 of 16