Hire Vetted Mobile Application Engineers at Upstaff - Page 3
All vetted software engineers you need to build AI, Web3, and data Products.
- Dedicated Full-time commitment for long-term or Time& Material for shorter or ongoing support
- Europe, Israel, LatAm, United States, Asia geography coverage
- Remote and hybrid engagement
- Trial period, no termination fees or hidden costs for transparent and risk-free onboarding.
Mobile Application
All
Web Application
Data and Analytics
Operations and Cloud
Mobile Application
Digital Platforms
Blockchain
Design and Creative
Quality Engineering and Testing
Delivery Management and Analytics
Desktop Software
Writing and Translation
Marketing and SEO
Scripting and Automation
Embedded Systems
Low-Code
GameDev
Industrial Engineering
Illustration and icons 20yr.
Swift 5yr.
Objective-C
C++
- iOS software developer with 10+ years of experience. Participated in developing an architecting different iOS applications: from iOS AVFoundation players to iPad book readers, from hospitality and Digital Key experience to VPN and security (privacy) applications.
- Comprehensive knowledge of core iOS frameworks, excellent hands-on experience in CI/CD
pipelines setup, Unit testing and UI prototyping. I have complete knowledge of Apple development guidelines and put 20+ applications to the AppStore.
- Strong team player: Always set the product’s needs and team’s goal at the topmost priority. Occupied team leader positions and have lead my teams to growth, and have proven leadership experience.
- The scope of professional interests is in between cutting edge technologies: from modern REST API stack technologies to networking, from big-data and machine learning to computer vision applications.
- Work expectations would perfectly match with iOS application development and architecting; taking a part in prototyping of UI/UX with technical expertise; leading the team and perform technical expertise of any level. The main goal is to develop robust, advanced and feature-full applications for the world-wide auditory.
- Upper-Intermediate English
FDD 10yr.
Swift 5yr.
Objective-C
Java
Architecture and Design Patterns
- Software engineer with a decade of experience, skilled in a multitude of programming languages including Swift, Objective-C, and Java.
- Expert in developing for iOS with in-depth knowledge of frameworks such as UIKit, SwiftUI, CoreData, and an adept understanding of BLE technology.
- Led the maintenance and feature development of a well-known iOS VPN and Password Manager application, focusing on optimizing performance and implementing new features.
- Utilized MVC architecture alongside Objective-C and Swift to enhance the functionality of the VPN and Password Manager application.
- Played a key role in refactoring the VPN application codebase to improve efficiency and maintainability.
- Leveraged Alamofire for network management within the VPN application, ensuring reliable and secure connections.
- Collaborated closely with the development team to maintain the high quality of the VPN application's user experience and performance.
- Upper-Intermediate English
Swift 2yr.
IOS SDK 2yr.
XCode 2yr.
Architecture and Design Patterns
Software Engineer with 2.6 years of experience in iOS application development, specializing in Swift and Objective-C. Proficient in building applications from concept to deployment with a strong background in working with iOS frameworks, RESTful APIs, third-party libraries, and XCode/Swift coding and debugging. Demonstrated abilities in architecture design, including MVC and MVVM patterns, and incorporating advanced features such as socket integration, push notifications, Google Maps, and payment gateway integration. Contributions to projects like an appointment booking app for a tattoo studio, an international e-commerce app, a mortgage application, and a taxi booking platform showcase technical versatility and a commitment to delivering engaging user experiences. Holds a Bachelor of Computer Applications and is currently pursuing a Diploma in Computer Applications, underpinning a robust foundation in computer science and software development practices.
iOS
Software engineer with 4+ years of commercial experience in IT;
- Strong skills working with iOS;
- Proficient in developing applications using Swift and Objective-C;
- Experience with iOS technologies such as UIKit, SwiftUI, Combine, Core Data, and more;
- Familiarity with various architecture patterns, CI/CD, OOP principles, and REST API;
- Excellent knowledge of OOP and experience in using design patterns;
- Proficient in using Git for source control and Jira for tracking systems;
- Experienced in Agile development methodologies such as SCRUM and Kanban;
- Demonstrated expertise in mobile app development, including UI/UX design, testing, and deployment;
- Skilled in using various tools and frameworks such as Firebase, CoreML, and CocoaPods;
- Strong problem-solving skills and ability to work with databases such as SQLite, MySQL, and NoSQL;
- Proficient in English, both spoken and written, at an upper-intermediate level.
FDD
Swift
Objective-C
UIKit
SwiftUI
Software engineer with extensive experience in native iOS development, skilled in Swift and Objective-C, and a strong background in Computer Science from Chandigarh University. Notable achievements include leading 5+ projects solo and earning the 'Plobal Apps Rising Star 2024' award. Proficient in UIKit, SwiftUI, and various other iOS technologies, the engineer has a proven track record of contributing to scalable mobile applications, while expertly employing tools such as Git, Firebase, and Realm. With effective communication skills reflected in successful client interactions and a dedication to Agile methodologies, they have demonstrated the ability to drive projects to successful completions.
$40/hr
iOS
- 7+ years of commercial experience in IT
- Experience in developing applications using Swift, Objective-C
- Excellent knowledge in OOP
- Experience in using 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
- Intermediate English
- Availability starting from 01/08/2023
$40/hr
iOS
- 11+ years of commercial experience in IT
- Experience in developing applications using Swift, Objective-C
- Excellent knowledge in OOP
- Experience in using 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
- Intermediate English
- Availability starting from 20/07/2023
Java 7yr.
Kotlin 5yr.
Facebook Auth 4yr.
Node.js 4yr.
Dart
Seasoned software engineer with 8 years of rich experience in mobile and full-stack development, particularly in Flutter, Kotlin, Node.JS, and Java. Proven track record in leading development teams and designing robust software architectures, evidenced by successfully delivering a critically acclaimed MVP for a hair color mixing app and dramatically improving an international social media app's performance by 80%. Proficient in Clean Architecture, DDD, CI/CD using GitHub Actions, and efficient RX programming. Strong background in software engineering with a Bachelor's in IT Administration and an Associate Degree in Software Engineering, coupled with hands-on experience in MVC, MVVM, SOLID principles, and various design patterns. Skilled in enhancing software scalability and performance, contributing to substantial revenue growth and client satisfaction through innovative solutions.
Dart 3yr.
Swift 3yr.
JavaScript 1yr.
Kotlin
Rust
Software engineer with extensive experience in mobile development, particularly with Flutter on HealthTech and FinTech products. Strong proficiency in Dart, Swift, JavaScript, Kotlin, and Rust, alongside deep familiarity with technologies such as Flutter, iOS, Android, Firebase, and AWS S3. Demonstrated excellence in applying engineering principles and practices such as Agile, OOP, SOLID, and design patterns like MVVM and MVC. Proven track record of boosting application performance and user retention through strategic optimizations and analytics integration, along with experience in leading teams and enhancing code quality through thorough code reviews and automated testing. Proficient in CI/CD and testing frameworks, adept at crafting responsive layouts, and capable of implementing effective SDLC methodologies.
C/C++/C# 6yr.
FDD 6yr.
Xamarin 3yr.
Facebook Auth 1yr.
.NET Maui
Seasoned software engineer with 10+ years of diversified experience in mobile and software development, including hands-on expertise with Flutter, Xamarin Forms, and .NET technologies. Proven track record of leading end-to-one mobile app development, implementing modern design to responsive UI code, and maintaining exemplary code quality standards. Acknowledged for mentoring junior developers, streamlining deployment processes, and effectively participating in SDLC in agile environments. Proficient in both Arabic and English, with a substantial history of working with international teams and clients.
Facebook Auth
Dart
Kotlin
MVVM+Rx
GraphQL
Software engineer with 5+ years of experience specializing in Flutter development, adept at leading teams, and establishing development standards. Proven track record in architecting and deploying mobile apps with complex functionalities, including synchronous video players, multiple themes for whitelabel solutions, and comprehensive content management systems. Skilled in creating robust CI/CD pipelines (Codemagic, GitHub Actions) and implementing security measures aligned with backend infrastructures. Proficient in native plugin development across Kotlin, Java, Swift, and JavaScript. Educational background includes ongoing studies in Analysis and Systems Development, with strong problem-solving and team leadership abilities.
Flutter 4yr.
GCP 4yr.
Firebase 4yr.
Go
* Software engineer with over 4 years of experience in mobile app development, specializing in Flutter and proficient in Dart, Kotlin, and Go.
* Strong technical expertise in building robust backend systems, REST APIs, and has a keen interest in Blockchain technology within the GCP ecosystem.
* Demonstrated ability in web development using modern technologies including HTML, CSS, JavaScript, React, and NextJs.
* Active contributor to open-source projects, enhancing the value of platforms like APIDash and GoCoin.
* Holds a Bachelor's and a Master's degree in Computer Engineering, underpinning a solid understanding of software development practices.
* Recognized for building impactful mobile applications such as Edutive for education and Racha for addiction management.
Dart 4yr.
Kotlin 4yr.
Swift 4yr.
Java 4yr.
JavaScript
Software engineer with over four years of mobile development experience across multiple platforms and a strong educational background including a BSc Honors in Information Technology. Proficient in languages such as Dart, Kotlin, Swift, Java, JavaScript, and TypeScript, and skilled in frameworks like Flutter, Jetpack Compose, and SwiftUI. Experienced in working with tools like Xcode, Android Studio, and GIT. Has a portfolio of quality applications and a proven track record in full software development life cycle (SDLC), test-driven development (TDD), and collaborating with cross-functional teams to deliver apps with effective UI design and robust security measures.
.NET 6yr.
Xamarin 5yr.
Flutter 4yr.
Dart 4yr.
Firebase
- Commercial Experience with Mobile Development since 2016 in the banking, insurance, health and beauty industries, education and e-commerce
- Senior and Lead Developer, able to organize the process of building an application both by himself and by a team
- 4+ years of commercial experience with Flutter and Dart
- 5+ years of experience with Xamarin
- Significant experience in development with Firebase
- Proven experience with start-ups in early stages of growth
- Extensive experience of work with international companies in Canada, the UK, Saudi Arabia, the UAE, Egypt, Jordan, Kuwait
- Experience in MVP and architecture development of complex mobile applications such as mobile banking and e-commerce platforms.
- Experience with SDKs and APIs
- AI/ML enthusiast
- Excellent soft skills scaled up in work in mixed teams in international companies, open-minded, trouble-shooter, great communicator and experienced mentor
- Upper-Intermediate English
- Native Arabic
- Available ASAP
Java
Kotlin
XML
Android APIs
SQLite
Software engineer with over 8 years of experience in Android app development and team leadership, proficient in Java and Kotlin. Expertise in application architecture, UI/UX design, database management with SQLite, Room, Firebase, and Firestore. Skilled in project management tools like ASANA, Trello, and Slack. Extensive knowledge in REST APIs, third-party libraries, and payment gateway integration. Proven track record of delivering projects on time using Agile methodologies while implementing best practices in code review, unit testing, and maintaining app performance. Technical acumen is demonstrated through the successful delivery of diverse projects spanning digital wallets, e-commerce, and logistics.
Facebook Auth 5yr.
Dart 5yr.
Java
Kotlin
Crashlytics
Software Engineer with over 5 years of experience in Flutter development for iOS and Android platforms. Adept at the Dart language, the engineer excels in creating high-performance and visually appealing apps with responsive design. Their technical expertise includes MVC/MVVM patterns, state management, and implementing deep/dynamic linking. Proficient in integrating with various databases like SQLite and Firebase and utilizing PM tools like Trello and Slack. The candidate has a strong background in developing and managing complex projects, evidenced by their history of timely project deliveries and effective client communications. Their significant role in development, testing, and deploying applications with third-party integration and unit/widget testing underlines their comprehensive skill set in software engineering.
Dart 4yr.
HTML5 4yr.
Postman
Software engineer with extensive experience in mobile development for platforms including iOS and Android, specializing in Flutter. Skilled in upgrading and optimizing applications, evidenced by migrating a codebase from Flutter 2.5.0 to 3.3.0 within 3 months and implementing a dark mode theme. Demonstrated expertise in integrating bank APIs, adding savings features, and transitioning from Provider to Riverpod for state management. Proven ability in using Lottie for smooth animations and developing responsive designs, alongside proficiency in Dart, HTML5, and Postman API technologies. Holds a Bachelor's degree in Electrical and Electronics Engineering, underlining a strong engineering foundation. Co-founded a health-tech startup and contributed to e-commerce, Fintech, AI, and health sector projects, showcasing a breadth of industry exposure and technical versatility.
Dart 2yr.
Swift
Kotlin
TypeScript
The engineer in question manifests proficiency in mobile application development, with extensive experience in the creation and enhancement of complex platforms within the Nigerian market. Possessing demonstrated expertise in Flutter and Dart for cross-platform development and a grasp of native API interfacing using Swift and Kotlin, the engineer has effectively employed TypeScript for cloud function management on Firebase. Additionally, the engineer has skilfully set up CI/CD with Fastlane and integrated real-time communications with websockets, contributing to the delivery of robust, user-friendly applications. Maintaining a strong focus on performance and stability, the engineer leverages tools such as Firebase Crashlytics and Flutter's performance profiling. Moreover, the engineer's background encompasses a Computer Science degree, providing a sound theoretical foundation underpinning their practical skills. With a portfolio featuring innovative features like AI-based verification, video calling via the Agora SDK, and advanced in-app transaction functions, the engineer’s technical acumen ensures a performance-focused and user-centric development approach.
Facebook Auth 4yr.
Android APIs 4yr.
iOS 4yr.
Identity Server
Firebase Realtime Database
Software engineer with 4+ years of experience specializing in mobile app development, including UI/UX design, with expertise in Flutter and integrations with Firebase. Highlights include leading the development of mobile platforms for companies like Boostmate Inc and PDA Funds, improving app performance, and maintaining high coding standards. Proven track record in applying Agile methodologies, performing unit and E2E testing, and employing tools such as Git/GitHub for project management. Holds a computer science degree from Kwame Nkrumah University of Science and Technology, emphasizing this candidate's strong theoretical and practical foundation in software engineering.
iOS 4yr.
Android APIs 4yr.
Dart
Seasoned software engineer with a Bachelor's degree in Computer Engineering and 4+ years of experience in app development. Proficient in Dart, Swift, Obj-C, Java, and skilled in MySQL. Delivered a patient aid app using Flutter & iOS with coreML integration. Played pivotal roles in agrotech projects, contributing to social media feed functionality and offline accessibility. Expertise extends to Flutter plugin development, enhancing data syncing, and deep linking. Solid background in SDLC, agile methodologies, and CI-CD practices, leading to efficient and effective project execution.
Facebook Auth 2yr.
Dart 2yr.
Crashlytics
AWS SES (Amazon Simple Email Service)
GraphQL
['Skilled Flutter developer with 2+ years of experience crafting mobile applications.', 'Proficient in Dart, Flutter, Firebase, and a suite of modern development tools and frameworks.', 'Proven track record of working in collaborative settings, emphasizing teamwork and communication.', 'Educational background includes specialization in music, demonstrating a diverse skill set and discipline.', 'Contributed to various projects such as a social network for dog owners, a plant-growing engagement app, and loyalty management apps.', 'Adept at implementing state management solutions using Bloc, GetX, and Redux, ensuring scalable and maintainable code.', 'Technical versatility demonstrated by integrating REST APIs, Google Maps, Node.js, .NET, and working with AWS services.']
Unreal Engine
Team Leadership
API
FDD
Software engineer with over 8 years of experience specializing in payment systems, e-commerce integrations, and both frontend and backend development. Proven track record in developing plugins for WooCommerce and Magento, creating Shopify payment applications, and constructing APIs for complex systems. Holds a B.Sc in Computer Science with a focus on Software Engineering. Proficient in PHP, Java, Go, Python, JavaScript, Bootstrap, and Tailwind CSS. Experienced in PostgreSQL, MySQL, CI/CD, and implementing monitoring and caching solutions.
React 5yr.
AWS 4yr.
Node.js
PHP
Python
Full Stack Engineer with over 4 years of professional experience and a strong educational background in Media Technologies and Leadership. Skilled in front-end and back-end development using technologies such as React.js, Node.js, Next.js, TypeScript, PHP, and Python, complemented by expertise in databases like MongoDB and PostgreSQL. Proficient in a variety of modern tools and platforms including AWS, Google Cloud, Docker, and CI/CD practices. Recognized for transforming business requirements into scalable digital solutions and optimizing web applications for improved SEO and performance.
React
React Native
TypeScript
Node.js
Express
Software engineer with a Bachelor's degree in Computer Software Engineering and 9 years of full-stack development experience. Expertise in React, React Native, Node.js, TypeScript, and AWS, with a record of developing SaaS fintech platforms and efficient CI/CD pipelines. Proficient in performance optimization, microservices architecture, and Web3 integrations. Adept in Agile methodologies, TDD, and advanced search implementations.
React Native
React
- Software Engineer with a Computer Science and Software Engineering background, bringing over 7 years of experience in developing mobile and web applications.
- Proficient in a spectrum of technologies, including React, React Native, TypeScript, JavaScript, and modern libraries and frameworks like Redux and Expo.
- Demonstrated leadership skills as a Team Lead, with a track record in managing development cycles, CI/CD pipelines, and team coordination to ensure timely delivery of high-caliber solutions.
- Adept in various domains such as IoT, utility infrastructure, and gambling.
- Strong emphasis on agile methodologies, clean code principles, and cutting-edge technology integration to build scalable and performance-centric applications.
Schedulers
Call Handling
Professional secretary and Virtual assistant with over 3 years of industry experience across various sectors including education, entertainment, health, and business. Demonstrated abilities in managing schedules, handling communications, and providing remote administrative support to enhance operational efficiency. Proficient in research, data entry, social media management, and a suite of other administrative tasks. Offering a 10% discount to the first new client, highlighting a commitment to providing valuable and affordable services.
JavaScript 7yr.
React Native 7yr.
TypeScript 5yr.
Dart 1yr.
Software engineer with 7 years of experience in developing business applications, finance, gambling, and educational software. Proficient in JavaScript, TypeScript, and Dart with extensive expertise in React, React Native, and Flutter. Proven track record in implementing scalable, high-performance mobile and web applications with a mastery of state management libraries Redux, Redux-Toolkit, Redux-Saga, and a suite of React Native libraries. Strong foundations in Computer Science and adept in cloud services including AWS and Firebase, integrated development environments, and adopting CI/CD with Fastlane. Recognized for improving system performance through render optimization and building automated, responsive UIs across various platforms. Actively engaged in continual learning, code reviews, testing, and adhering to best software development practices ensures delivery of mission-critical projects.
React Native
React
- A skilled Mobile Developer with 7+ years of experience
- Strong knowledge of Javascript, TypeScript, React.js, React Native, Redux (Thunk, Saga), MobX, and much more
- Has strong critical thinking skills, the ability to navigate various data environments, hands-on technical ability in data, and a drive to understand clients’ business
- Connects with Product and Engineering teams to produce instrumentation to generate insightful measurements on new and existing products
- Works across departments and collaborates with business managers, systems architects, engineering delivery teams, project managers, QA, and operations teams
- Upper-Intermediate English
Dart 5yr.
Flutter SDK 5yr.
Kotlin
Java
OOP
-Over 5 years of commercial experience in software development
- Experienced have deep knowledge and versatile skills in building cross-platform apps for iOS and Android.
-Proficient in Dart, Kotlin, and Java, Flutter SDK
- Technical toolkit: OOP, Data structures and algorithms, Asynchrony and Isolates, Flutter SDK, MVC, MVP, MVI, Clean Architecture, Provider, Freezed, BLoC, Design patterns, Material Design, Firebase services (Auth, Firestore Realtime Database), Multithreading Principles, REST API, Coroutines, RX, Flame, Flame Audio, Google Analytics/Crashlytics, Flutter Web, Freezed, Swagger Generator.
- Extensive experience in software quality assurance
- Experience includes a variety of projects in different industries such as Social Media, Education and Recruitment Management Systems, and many others.
Flutter SDK
Dart
Kotlin
Swift
Java
-A software engineer with over 6 years of commercial experience with deep knowledge and versatile skills in building cross-platform apps for iOS and Android.
-Proficient in Dart, Kotlin, Swift, and Java languages, as well as a wide range of Flutter SDK
tools.
- Deep expertise in Flutter development within diverse domains like Social Media, IoT, Crypto industry, and Travel.
- Extensive experience in software development and software quality assurance.
- Successful experience in working in large teams at all stages of the development cycle, from initial concept to release and subsequent support.
- A results-driven problem solver with a strong academic background, holding a Master's degree in Software Engineering.
Angular
Ionic
.NET
- Web and Mobile app developer with 7+ years of experience in the IT industry
- Skilled in front-end and back-end development, API integration, optimization, and refactoring.
- Proficient in building scalable and high-performance applications using Angular and associated technologies.
- Experienced in working with databases, server-side rendering, and cloud platforms such as AWS and Firebase.
- 6 years of experience with Angular
- 3+ years of experience with Ionic
- Upper-Intermediate English
- Available ASAP
Kotlin 5yr.
Java 5yr.
Erlang
MVP
MVVM+Rx
Senior Android Engineer with over a decade of experience in building commercial applications, expertly versed in Android SDK, Kotlin, Java, and a variety of frameworks and libraries such as Retrofit, Moxy, Dagger 2, and Jetpack compose. Highly skilled in object-oriented architecture, patterns, and network communication protocols like MQTT and HTTP/HTTPS, with proficiency in Binary Data Protocols and general algorithm construction. Demonstrates a solid track record in leading teams through the full lifecycle of application development, from requirement gathering to deployment on the Google Play Store. Holds a Ph.D. in Computer Sciences and excels in a fast-paced agile environment, bringing a wealth of knowledge in architecture solutions, API design collaboration, and advanced Android UI/UX. Recognized for leadership, impeccable time management, and effective communication skills alongside a commitment to code quality and software excellence.