Discover Top Developer Profiles

Our directory at Upstaff.com showcases a talented group of developers, each bringing a wealth of expertise to the table.

  • With profiles highlighting skills in IT development, AI, design, sales, marketing, admin, and customer support, our developers stand out for their rigorous vetting and diverse technical proficiencies. Ranging from seasoned experts with over a decade of experience to skilled mid-level professionals, they excel in languages like JavaScript, Python, and React, tackling complex projects with precision.
  • Hailing from various regions, including Europe, LatAm, Israel, and the United States, our developers offer a global perspective, ensuring adaptability and high-quality work across industries.

Each profile reflects a commitment to excellence, validated through thorough technical assessments and communication evaluations, making them reliable partners for any project.

JavaScript
Flutter
DevOps
...

0.5+ year of experience in Software Development; Development of mobile applications for clients and internal use;

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Seniority Junior (1-2 years)
Location Lviv, Ukraine
Swift 7yr.
macOS 9yr.
SQL 7yr.
Alamofire 7yr.
Core Data 7yr.
UIKit 7yr.
Git 7yr.
iOS 7yr.
Jira 7yr.
Postman 7yr.
Scrum 7yr.
CocoaPods 6yr.
Realm 5yr.
MapKit 5yr.
Unit Testing 5yr.
Fabric 4yr.
Moya 4yr.
ARKit 4yr.
Core Bluetooth 4yr.
SceneKit 4yr.
Google Maps API 4yr.
Sketch 4yr.
Dispatch 4yr.
IGListKit 4yr.
Foundation 3yr.
AVFoundation 3yr.
StoreKit 3yr.
Sinatra 2yr.
Firebase 2yr.
Core Location 2yr.
Viper 2yr.
MediaPlayer 2yr.
SOLID 2yr.
XCode 2yr.
Generamba 2yr.
Push notifications
Starscream
Facebook SDK
RESTful API
Stripe
Swagger
Uber API
GitLab
Miro
DeclerativeTVC
iBeacon
Twilio SDK
Zendesk
...

- 7+ years of iOS developer - 7 years of experience with Swift - Upper-intermediate English - Available ASAP

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Seniority Senior (5-10 years)
Location Ukraine
iOS
Objective-C
Swift
C
C++
GLSL
x86 Assembly
Streaming
SQL
AES
Appium
AVFoundation
UIKit
Bluetooth
Git
SVN
Linux
IOS SDK
Embeded
...

- 5+ years of experience as the iOS Software Engineer - Intermediate English level - Available ASAP

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Seniority Middle (3-5 years)
Location Ukraine
Swift
Objective-C
AWS SDK for Android
WebKit
Google Analytics
Firebase
Alamofire
CocoaPods
Core Data
SnapKit
SwiftLint
SwiftUI
Facebook SDK
JWPlayer
ObjectMapper
Push Notification
ReSwift
WidgetKit
WKWebView
...

- 4+ years experience in iOS apps development - Hands-on scripting experience with Swift; Objective-C, iOS APIs and Frameworks, 3rd party libraries. - SwiftUI, Firebase and CoreData.

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Seniority Middle (3-5 years)
Location Ukraine
iOS 5yr.
Android 2yr.
Java
Kotlin
Objective-C
Swift
...

iOS developer with 5+ years of proven working experience in designing, building, and maintaining iOS applications. He is proficient in Objective-C and Swift, has a strong knowledge of iOS frameworks, as well as code versioning tools.Alexei is familiar with RESTful APIs, experienced in continuous integration, and automated testing. He possesses an in-depth understanding of various programming technologies, UI/UX standards, as well as Agile development methodologies. In addition, Alexei can boast of vast expertise working closely with cross-functional teams to define, design, and ship new features, as well as interacting with customers.

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Seniority Senior (5-10 years)
Location Warsaw, Poland
Swift
React Native
Firebase
NoSQL
Atlassian Trello
Jira
AVFoundation
Core Animation
Core Data
BitBucket
Git
Cornerstone
DRY
KISS
MVVM
SOLID
iOS APIs
...

- 6+ years of experience with iOS - Hands-on scripting experience with CoreData, Core Animation, AVFoundation, MVC and MVVM - Proficient with Swift 4.0, Objective-C, React-Native, RESTful APIs

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Seniority Middle (3-5 years)
Location India
Java
Kotlin
Android Jetpack
Android SDK
Android Studio
Retrofit
Room (Android Jetpack)
Glide
Java Core
JSON
Material UI
Firebase
SQLite
Android
Collections API
RESTful API
Git
MVP
OOP
UI/UX
Multi-threading
...

- Android Engineer (6 months) - Educational program (mentoring, code review, git-flow, task management, time management) - Android Fundamental Courses - Available ASAP

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Seniority Junior (1-2 years)
Location Kharkiv, Ukraine
React Native 3yr.
...

React Native

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Seniority Middle (3-5 years)
Location Tashkent, Uzbekistan
Flutter
Dart
Java
Android SDK
Android Studio
Java Core
SQL
API
MVP
MVVM
Bloc
databases
...

7 years of professional expertise in IT industry; Android developer with 5+ years of experience Flutter developer with 2+ years of experience

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Seniority Senior (5-10 years)
Location Cherkasy, Ukraine
JavaScript 3yr.
React 1yr.
React Native 3yr.
Android 3yr.
Atlassian Trello 3yr.
Jira 3yr.
Git 3yr.
iOS 3yr.
Linux 3yr.
Windows 3yr.
Visual Studio 3yr.
C# 2yr.
TypeScript 2yr.
.NET 2yr.
CSS 1yr.
HTML5 1yr.
Redux 1yr.
MySQL 1yr.
JSON API 1yr.
RESTful API 1yr.
...

- 3 years of experience in the software development. Working on mobile and web development using JavaScript frameworks like React, React-native, Redux. Highly experienced in creating custom components according to the design. Confident with my skills in Unit Testing, HTML, CSS, API integration. - Intermediate English - Available ASAP

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Seniority Middle (3-5 years)
Location Lviv, Ukraine
JavaScript 4yr.
React Native 4yr.
React 4yr.
Firebase 3yr.
TypeScript
Crashlytics
CSS
HTML
jQuery
Kitten UI
Material UI
SASS
SCSS
React-Saga
Redux
Redux Persist
Webpack
MongoDB
MySQL
Firebase Analytics
Apiary
Facebook API
Facebook SDK
Geolocation API
Google Maps API
Google SDK
BitBucket
Git
Jira
Dynamic links
Firebase FCM
Firebase services
Twitter​Bootstrap​
...

- A detail-oriented software engineer with 4 years of experience in web and mobile development. - Intermediate English - Available in two weeks

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Seniority Senior (5-10 years)
Location Ukraine
React
React Native
Firebase 4yr.
JavaScript
CSS
HTML
Node.js
Redux
...

Senior React Native Developer

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Seniority Senior (5-10 years)
Location Uzhgorod, Ukraine
iOS 11yr.
Swift 5yr.
Objective-C 5yr.
Java 3yr.
Spring Boot 3yr.
React Native 3yr.
Unity 2yr.
ASP.NET Web API 1yr.
Xamarin 1yr.
...

Expert with iOS swift/ Objective C development Nearly 2 years experience on Java Spring Boot development

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Seniority Senior (5-10 years)
Location Karachi, Pakistan
Flutter
Objective-C
iOS
Android
Dart
Swift
Salesforce
Firebase
RESTful API
Bloc
Provider
...

- 15 years of experience in IT. 3 years of experience as a Flutter Developer. - He has experience in developing applications from scratch using the Flutter framework. He has good experience in developing mobile applications for both Android and IOS. Writing and maintaining existing programs. - Experience with programming languages Objective-C and Swift. - Upper-Intermediate English - Available ASAP

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Seniority Middle (3-5 years)
Location Turkey
Kotlin 2yr.
...

Kotlin

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Seniority Middle (3-5 years)
Location Tashkent, Uzbekistan
Android 6yr.
Java
Kotlin
Android Jetpack
ButterKnife
Hilt
Koin
Retrofit
Room (Android Jetpack)
ViewBinding
Crashlytics
Dagger
DataBinding
Glide
Gson
OSMdroid
JSON
Jsoup
okHttp
Firebase
ObjectBox
SQLite
Firebase Cloud Messaging
Google Cloud Messaging
BitBucket
Git
GitLab
SVN
Clean Architecture
MVC
MVVM
SOLID
Google Maps API
RESTful API
MVP
WebSockets
...

- Senior Android Engineer with 6+ years of commercial experience and strong organizational skills. - Proficient in Android development using Java, Kotlin, and libraries like Retrofit and Room. - Expert in methodologies like MVC, MVVM, Clean Architecture, and SOLID principles. - Comfortable working with REST API, version control tools like Git, and project management through MVP. - Upper-Intermediate English - Available ASAP

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Seniority Senior (5-10 years)
Location Ukraine
Flutter
Dart
Artemis
Java EE
Java SE
JSON
Hibernate
Spring Boot
Vaadin
Firebase
MySQL
Oracle SQL
SQLite
Apache Maven
BitBucket
Git
GitLab
SVN
Docker
Jenkins
Jira
Kafka
microservices architecture
RESTful API
SOUP
...

- Software Developer with 4 years of professional experience in mobile and enterprise apps development. - 2 years of experience as a mobile developer using Flutter - 3 years of experience with Java - Upper-Intermediate English - Available ASAP

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Seniority Senior (5-10 years)
Location Plovdiv, Bulgaria
Flutter
Dart
C#
JavaScript
Android SDK
Android Studio
Retrofit
CSS
HTML
React
Firebase
Microsoft SQL Server
PostgreSQL
Google API
RESTful API
Flutter SDK
Microsoft Visual Studio Code
XCode
Atlassian Trello
Jira
Git
SOLID
...

- 2+ years of experience developing mobile apps with Flutter - Participated in projects full-cycle development from scratch - Has experience with native Android/iOS SDKs - Has basic experience with JS, React - Intermediate English - Available ASAP

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Seniority Middle (3-5 years)
Location Ukraine
Java
Kotlin
Dart
Android SDK
Hilt
Jetpack Compose
Koin
Room (Android Jetpack)
Canvas
Dagger
okHttp
RxJava
Data binding
Glide
Gson
Kotlin Coroutines
LivaData
Moshi
Retrofit 2
Material UI
Firebase
SQLite
AWS
Android
Google Colaboratory
Daylimotion Player SDK
Elevation API
Google Maps API
Google Places API
Kotlin Flow
RESTful API
Flutter SDK
FreeBSD
Linux
macOS
Windows
Git
Jira
MVVM
OOP
XMPP
...

- 5+ years of experience in Android Development - Experience in developing applications using Java, Kotlin, Dart - Excellent knowledge of OOP - Experience in using Software design patterns - Good logical thinking, self-learning, high level of responsibility - Responsible, hard-working, result-oriented, creative and communicable, team player - Good attention to details - Upper-Intermediate English

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Seniority Senior (5-10 years)
Location Ukraine
Java
Kotlin
Android
Architecture Components
Data binding
Glide
Koin
Kotlin Coroutines
OSMdroid
Retrofit2
Cicerone
Google Play services
Retrofit
Room (Android Jetpack)
okHttp
RxJava2
Firebase
Google Services
Atlassian Confluence
Jira
BitBucket
Git
Clean Architecture
MVVM
SOLID
HTTP
HTTPS
MVP
Postman
RESTful API
Swagger
...

- Experienced Android Engineer with 6+ years in Java and Kotlin app development. - Proficient in Android development frameworks like Retrofit and Room (Android Jetpack). - Expertise in Clean Architecture, SOLID, MVVM principles, REST API, and HTTP. - Skilled in project management using Atlassian JIRA, Confluence, and Agile methodologies. - Upper intermediate English - Available ASAP

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Seniority Middle (3-5 years)
Location Rivne, Ukraine
C#
Java
Objective-C
Swift
Android Studio
Entity Framework
.NET
WPF
XML
SQLite
Azure DevOps
Eclipse
Visual Studio
XCode
Bamboo
Jenkins
Git
SourceTree
Jira
Redmine
Scrum
TestFlight
Xamarin
xunit
Web API
...

- Xamarin developer with more than 7 years of experience in IT industry. - With Xamarin specifically I’ve been working for the last 6 years. - Deep knowledge and professional expertise in C#, Xamarin iOS and Xamarin Android (both Native and Forms). - Experience in participation in full life-cycle of software design and development process including requirements gathering and analyzing, technology selection and architecture design, application core development, testing and deployment. - Upper-Intermediate English. - Available ASAP

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Seniority Senior (5-10 years)
Location Ukraine
Android 7yr.
Flutter 3yr.
Java
Kotlin
Dart
AdvancedRecyclerView
Android Bluetooth
Android Reflection
Android Studio
Retrofit
SharedPreferences
Canvas
WebView
okHttp
RxJava
Moor
SQL
Adobe Photoshop
Adobe XD
Figma
Atlassian Confluence
Atlassian Trello
Jira
Charles Proxy
Mantis
Postman
Zeplin
Facebook Auth
RESTful API
Git
iOS
Linux
macOS
Windows
Kanban
Scrum
MQQT
WebSockets
ApkTools
CustomClipper
Custom View
CustomView
DotDivider
FilePicker
FlutterIcon
FlutterSvg
GoogleSignIn
JodaTime
MatLog
MPAndroidChart
NotepadQQ
Nucleus
PinEntryTextField
ShowcaseView
UrlLauncher
...

- 16 years of experience in IT. 3 years of experience as a Flutter Developer. - He has experience in developing applications from scratch using the Flutter framework. - Intermediate English - Available ASAP

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Seniority Middle (3-5 years)
Location Poland
Swift
Objective-C
C++
Foundation
Metal
Realm
AFNetworking
Alamofire
Core Data
Core Foundation
Core Graphics
Core Location
GPUImage
MapKit
Git
SVN
iOS
macOS
Windows
Qt Framework
XCode
MessageUI
MFMailCompose
ObjectMapper
PortSIP
SDWebImage
SwiftyJSON
...

- 8+ years of experience in the IT industry developing native IOS applications - Providing a full-cycle mobile development using the latest versions of Swift and Objective-C - Hands-on scripting experience with CoreData, Core Animation, AVFoundation, MVC, and MVVM - Upper-Intermediate English - Available ASAP

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Seniority Senior (5-10 years)
Location Poland
iOS 11yr.
Objective-C 11yr.
Swift 5yr.
Java 3yr.
Unity 2yr.
Xamarin 2yr.
Spring Boot 1yr.
...

I have been working as an iOS developer for more than 10 years and I am currently working as an outsourced developer at SquareTrade(an AllState company). I am working on an app that is being used by millions of customers in the US.

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Seniority Senior (5-10 years)
Location Karachi, Pakistan