Name: Xamarin specialists
Brand: Upwork
Rating: 4.8 (131 reviews)

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Clients rate Xamarin specialists

4.8/5

based on 131 client reviews

$39 hourly
- 4.8/5
- (14 jobs)
Hello, I am Alex Budiakov, a Team Lead of the BuildApps team. My team has a great experience in development, UI/UX Design, and Web development. I have worked with truly amazing people on really cool projects that I am really proud of. I have made plenty of mobile apps. Expertise: • 5 years in mobile development. • Strong knowledge in C#, Android and iOS SDKs. • Languages: C#, Objective-C, Swift, Java, Dart • Binding Java(.aar) and Objective-C libraries(CocoaPods) • Understanding OOP Patterns and SOLID principles • Native mobile app development for iPhone, iPad, Android phone and tablet • Creating complex UI iOS(Storyboard, .xib or AutoLayout), Android(xml, axml) • Database: SQLite, Realm • Payment services: In-App Purchase, Stripe, TrustShare • Social media APIs integrations (Facebook, Twitter, LinkedIn , Google) • Communication: REST(HttpClient), Refit as Rest Client, RestSharp • Map integration: Google Maps(iOS, Android), MapKit(iOS) • AdMob integration (banners) • Analytics services: Google Analytics, Firebase Analytics • CI/CD: AppCenter • Distribution: Apple Store, Google Play • Design Tools: Sketch, Adobe Photoshop, Figma Technologies: • Flutter • React Native • BloC • MVVM • Xamarin Android • Xamarin iOS • Xamarin Forms • XML / JSON • LINQ • OData • Rx.NET Frameworks: • Entity Framework Core • SignalR • MvvmCross • FreshMVVM • Prism • Refit • RestSharp • Polly Data bases: • SQLite • Realm Architecture principles: • DDD • SOLID

Xamarin
C#
Firebase
Code Review
Mobile App Development
Desktop Application
iOS
Jira
Google Maps API
Android App Development
LINQ
JSON
XAML
Azure DevOps
SQLite
$40 hourly
- 5.0/5
- (32 jobs)
I am an experienced software developer with over a decade in the software industry working from desktop, web technologies to mobile applications and scalable backend services. I'll develop your Cross-Platform (iOS, Android) mobile apps and support you at every step of the journey: From refining your first idea, implementing it, to publishing your app in the App- or PlayStore, to support and bug fixes. Below you can find one of my video from youtube channel, where I implement nice UI's and custom controls in Xamarin.Forms.

Xamarin
Windows Phone
ASP.NET MVC
ASP.NET
C#
$55 hourly
- 4.8/5
- (74 jobs)
💪I can help: - ENTERPRISE CLIENTS scale their teams in times faster by providing access to a vast pool of talents that can become available in weeks instead of months. - STARTUPS to get their MVP done asap and with minimal expenses. - any client to GET their PROJECT DELIVERED ON TIME AND BUDGET. ⚡KEY TECHNOLOGIES: .NET (Microsoft Solutions Partner), Golang, Python, React.js, Angular, TypeScript, Electron.js, Native iOS (Swift, Objective-C), Android (Kotlin), Xamarin, AWS, and Google Cloud. ⭐FEATURES SERVICES and AREAS of EXPERTISE: • Web & Mobile & Desktop development • Cloud Solutions • UX/UI Design • Quality Assurance • Machine Learning & AI • Azure Enterprise apps • Application Modernization • Business Analysis 🚀To explore more, please visit ▫ Website blackthorn-vision.com ▫ Clutch clutch.co/profile/blackthorn-vision#highlights ▫ Instagram instagram.com/blackthorn_vision ▫ Facebook facebook.com/blackthornvision/

Xamarin
.NET Core
Golang
Windows Presentation Foundation
UX & UI
ASP.NET
Swift
React
Node.js
iOS
Android
AngularJS
C#
Kotlin
JavaScript
$20 hourly
- 5.0/5
- (19 jobs)
Over the last 15 years, I have developed a range of mobile and web applications. I specialize in development for mobile cross-platform (iOS and Android) and web platforms ASP.NET Core

Xamarin
SQL
ASP.NET
Android App Development
C#
JavaScript
Flutter
React
iOS Development
$35 hourly
- 4.9/5
- (13 jobs)
Hello There! I am senior software engineer with 7 years of experience in iOS/Android app development. I can provide solution for cross-platform app development with Xamarin and React Native. My skills: ✔ Xamarin (C#, Xamarin.Forms, Xamarin.iOS, Xamarin.Android, Xaml, MvvmCross, FreshMvvm, Prism) ✔ iOS ✔ Android ✔ Ionic I provide: • Excellent software architecture skills, with the ability to develop well-structure code. • Experience integrating with third party libraries and APIs. • Good comprehension of UI/UX, including Android Material and iOS Design guidelines. • Solid understanding of the mobile development life cycle. • Proven track record of publishing apps to App Stores. • Action-oriented, with strong initiative and the ability to solve problems creatively When dealing with customers I try to clarify necessary details concerning the project, estimated time for implementation.

Xamarin
Figma
Database Design
.NET Framework
ASP.NET MVC
Microsoft Azure
API
Angular
iOS Development
Android App Development
JavaScript
ASP.NET Core
C#
ASP.NET
$50 hourly
- 4.4/5
- (147 jobs)
Greetings! My name is Sergii, and I’m a Xamarin Certified Mobile App Developer with more than 6 years of experience. I started my way in web and mobile development back in 2012 as a Casual Game Developer working for FIVE-BN (Alawar Division), and gathered some beneficial knowledge on how to create game logic, optimizing game performance, game deployment, and bug fixing. Later on, I have worked as a C# Developer in SoftReactor LLC, where I’ve gained and polished my skills related to ASP.NET Core, C#, MySQL, WPF, XAML. At almost the same time, I’ve started my own company - HeadWorks, where till present days my team and I have been creating web, mobile, hardware (embedded) projects, helping other companies to implement and convert their ideas into reality. In 2014 I’ve discovered Xamarin and incorporated it into what I have been doing - cross-platform mobile applications for iOS and Android. The tech-stack and skills I have acquired: - Cross-platform mobile app development using Xamarin: Xamarin.Forms, Xamarin.Native (Android, iOS), MVVM, Prism, MVVM Cross, MVVM Light, MVVM Fresh, ReactiveUI, AJAX - Creating complex enterprise-level custom solutions using C#, C++, MySQL, ASP.NET MVC, .NET Framework (CLR), .NET Core (CoreCLR), .NET GC, Azure, REST API, Web API, Google Maps API, Twitter API - Front-end development: HTML, CSS, JS, Angular - Facebook SDK, Visual Studio - Version control systems: Git, Github, SVN - iBeacons, Eddystone (estimote, kontakt.io) - Payment processors (Stripe, PayPal, Apple Pay, Webmoney, Yandex.Money) - Analytics and crash analytics (HockeyApp, Microsoft Insights, Firebase) I have recently started acquiring new skills on Objective-C, Swift, Java, Xcode and am planning on concreting the knowledge in the future. I’m open to everything new in the world, love to learn and prove myself, so all your queries and projects are greatly appreciated, and I’m ready to support you around the clock. I’ve been working with both individual clients, private and public companies (enterprise clients) and have helped them to bring their business ideas, thoughts, projects into life. Hesitation is the enemy of success, so send me the message, and let’s get your project into shape!

Xamarin
XAML
Android
User Experience Design
Mobile UI Design
Mobile Programming
Mobile App Development
iPhone App Development
iOS Development
C#
Android App Development
$25 hourly
- 4.9/5
- (11 jobs)
An experienced professional with over 5 years of expertise, specializing in Apple platforms. In-depth understanding of the intricacies of this ecosystem, a proven track record of successful app review submissions to the App Store. Ensures high quality and timely delivery. Supported by a strong team capable of developing projects for Android, backend, or creating a comprehensive multi-platform application from scratch Project Ukraine (Nov 2022 - Aug 2023) • Led a 10-person team • Conducted interviews for new hires • Successfully built a project from the ground up Global Logic (Jul 2020 - Feb 2023) • Developed new features • Provided support for mobile applications • Worked on various projects, including Video on Demand Cloud Works (Sep 2020 - May 2021) • Developed new features • Offered support for applications • Contributed to an NDA retail management system project KSystems (Aug 2020 - Aug 2021) - Part-Time • Created iOS applications • Conducted code reviews • Published apps on the App Store • Mentored team members • Worked on the MacronCRM project Bova LLC (Feb 2020 - Aug 2020) - Junior iOS Developer • Developed iOS applications • Implemented new features • Contributed to astrology and virtual office apps Syject (Aug 2019 - Feb 2020) - Junior iOS Developer • Created iOS applications • Contributed to exam preparation and reader apps Flexible Solutions (Jun 2018 - Aug 2019) - Xamarin.Forms Developer • Developed mobile applications • Published apps on the App Store • Provided app support • Worked on EqApp horse stable manager

Xamarin
OpenCV
React Native
Firebase
Flutter
Google Protocol Buffers
Apple Xcode
Python
Objective-C
Swift
UIKit
SwiftUI
iOS Development
iOS
Mobile App Development
$45 hourly
- 5.0/5
- (70 jobs)
I Test In Prod 😁 ... Also, ✅ HIGHEST EARNING Flutter Freelancer on Upwork. Top Rated Plus (Top 1% of all freelancers). I have worked with 🌟High Profile Clients/Organizations🌟 in my Career. Top 2 reasons NOT to hire me: 1. You don't want your startup to get a swiss-knife problem solver. 2. You don't want to make a call. The main problem with developers from overseas is that they are pretty good at tech skills but they lack the proactivity of US guys. I always think of myself as a problem solver, not just a developer. Coding it's only a tool for rectifying issues. Sure, this might be a slightly over-simplified summary of what I do, but hey, who likes to read long descriptions anyways? Instead, let's jump on an initial 10-minute call so we can cover your project and decide how my development skillset will work best for you and your project.

Xamarin
Flutter
API Integration
Chat & Messaging Software
Location-Based Service
GPS
SQLite
Firebase
XAML
Georeferencing
Camera
Geolocation
Google Play
App Marketplace
Push Notifications
$45 hourly
- 5.0/5
- (3 jobs)
🚀 Greetings! With over 11 years in the mobile development realm, I am a full-cycle mobile developer equipped to construct entire mobile applications from the ground up, spanning from design to implementation. Here's a snapshot of the technologies I wield: ✅ Languages: Swift, Objective-C, Java, Kotlin, Javascript, Dart ✅ Frameworks: React Native, Flutter, Node.js ✅ Databases: Firebase, MySQL, MS SQL, Cassandra, MongoDB, PostgreSQL, Redis ✅ SCMs: Github, Gitlab, BitBucket ✅ CI/CD tools: Jenkins, TeamCity, CircleCI, GitLabCI, GitHub Actions, Bitbucket Pipelines, Docker, Kubernetes ✅ Testing Approaches: TDD, BDD My expertise extends to microservices and event-driven architectures, with a wealth of experience in handling scalable applications. Beyond coding, I excel in working with legacy code, optimizing and automating processes, and crafting efficient workflows. Proficient and skilled in both design and mobile development, I can transform your ideas into market-ready solutions. Here are some of my specialties: 🍔 Food/Retail Delivery and Pickup Platforms for Drivers, Staff, and Customers 👥 Social Networks for Friends/Groups with Chat, Feeds, Profiles, Signup, and Log in 🔄 Buy and Sell Marketplace Apps with Commissions and Payments 📊 Task Management, Expense Management, and more. Let's collaborate to bring your visions to life and make a significant impact in the digital landscape! 💻✨

Xamarin
JavaScript
Node.js
Tablet
Objective-C
Java
Hybrid App Development
Firebase
Mobile App Development
Android
iOS
Flutter
Smartphone
Smartwatch
iOS Development
React Native
Swift
Native App Development
Android App Development
Kotlin
$55 hourly
- 5.0/5
- (1 job)
I have good understanding of modern mobile applications trends. I always prefer to establish a good communication level with customers to provide exactly what they need and adapt fast to changing requirements. I'm confident, self-motivated and result-oriented person who can work under minimal observation. I can work both efficiently as team player and as an individual. I've built and managed projects for individuals and startups. Business logic, API, database layers are in core project(.net standard library), platform projects are only for data showing and some platforms specific features with native UI and UX guidelines. Xamarin utilizes C# as its key programming language. This enables more than 70% of the code to be reused between iOS, Android and other platforms. An app built with Xamarin offers the same level of performance as that of a natively developed app. Expertise: • More then 5 years experience in software development and mobile development. • Languages: C# • Strong knowledge in Android and iOS SDKs. • Binding Java(.aar) and Objective-C or Swift libraries(CocoaPods) • Native mobile app development for iPhone, iPad, Android phone, and tablet • Creating complex UI iOS(Storyboard, .xib or AutoLayout), Android(XML) • Database: SQLite, Realm • Communication: REST(HttpClient) • Social network integration: Facebook, Twitter, Instagram, VKontakte, Google+, etc • Map integration: Google Maps(iOS, Android), MapKit(iOS) • Analytics services: Google Analytics, Firebase Analytics, AppCenter • CI/CD & Crash Reporting: AppCenter, Firebase • iOS, Android Linker(link all), proguard, r8 • Distribution: Apple Store, Google Play • Design Tools: Sketch, Figma

Xamarin
LINQ
iOS SDK
Git
.NET Framework
Scrum
Object-Oriented Programming
Jira
Mobile App Development
Android
iOS
Dart
RESTful Architecture
C#
$40 hourly
- 5.0/5
- (5 jobs)
Computer vision engineer: C++, Python, OpenCV, CUDA, Git, Linux, Qt, Boost, OpenGl, PCL, Strong math background. Computer vision engineer • C++, Python, OpenCV, CUDA, Git, Linux, Qt, Boost, OpenGl, PCL, SLAM, Strong math background Hardware expert: • Nvidia Jetson Nano, TX2, Xavier; • Raspberry Pi; • Arduino, STM32; • Depth cameras like intel realsense d435i, etc. • Lidars, Radars. Machine learning engineer; • C++, Python, OpenCV, CUDA, Linux, Darknet, SegNet, TensorFow Software development for mobile platforms • Crossplatform Xamarin, С#, Phone Gap • Android (Java, Android Studio, Eclipse) • iOS (Objective C, Swift) Backend Developer • C#, SQL, PostgreSQL, .Net Core, REST Api, WebSockets • OCPP Protocol, Linux, Modbus, Raspberry Pi Software development • .Net Framework (C#, VB.Net, ASP.Net, .Net Core, WPF, UWP,WCF, ADO.Net) • Java (j2se, j2ee, servlets, java beans, Maven) • JavaScript (Node.JS, Express.js, Vue.js, Element.js, Angular.js, D3.js) • C++ (TCP/IP, HTTP, HTTPS, WebSocket, Modbus) • Python (MAVLink, WebSocket) • Step7 (S7 Communication, OCPP, Modbus, CANOpen, ProfiNet) Database • PostgreSQL • MySQL • MongoDB • Microsoft SQL • Oracle Database • Neo4J Website development • ASP.NET C#, MFC. Infocom Ltd is a company with successful software development experience since 1993. We implement projects that make the world better and make life easier for people all over the world. One of our implemented software development solutions are: Computer Vision mobile apps, stations for electric vehicles, autonomous solar power plants, unmanned technology for cars and robotics, automation of technological processes, Programmable Logic Glove, RFID tagging system for finished products, implementation and support of MES and ERP systems of the enterprise. We offer assistance ranging from remote server administration to the realization of your most fantastic ideas.

Xamarin
.NET Framework
Desktop Application
Front-End Development
Kotlin
OCR Algorithm
Object Detection
YOLO
DNN
CUDA
English
Mobile App Development
Android App Development
Deep Learning
OpenCV
Neural Network
Data Science
Machine Learning
Computer Vision
$40 hourly
- 4.9/5
- (6 jobs)
Hi, my name is Serhiy👋 I am an expert developer with over 30 years of experience and CEO of a progressive Dev team JETSOFTPRO🚀 💥I know how to unlock the full power of automation for any business to achieve higher productivity with minimal investment. I can cover you from CRM, ERP, HRMS, WFM, Supply chain, and Wearhouse management systems to chatbots and AI-powered digital assistants. 💥 Working with me, you will get 3️⃣ bonuses to optimize your business process 🔝 proven quality (please check testimonials of my clients) 🤝 flexibility: I cover your long-term needs and respond to your short-term issues 💰less administrative and management costs As a responsible back-end developer, I understand the importance of 📍 eligible and logical code 📍 accurate time estimate 📍 result-first approach How will it be? We set an interview where I learn about your business needs and offer the optimal solution. We discuss the terms and conditions and start collaborations with a clear view of my result and everyday synchronization if needed. I believe that work should be done perfectly, and even a single back-ender should feel partial ownership when writing code. Let’s discuss your project and my possible impact on your business result. Please write to me now✏️✏️ The techniques my specialists work with have extensive experience: ⚡Angular ( Front-end) •JavaScript (ES6+) •TypeScript •HTML5 •CSS3 •SCSS •Java (basic) ⚡ React( Front-end) •JavaScript (ES5, ES6) •TypeScript •HTML5 •CSS3 •SCSS/ Sass/ Less •Rest API •GraphQL ⚡Unity •Programming Languages/ Technologies:C#,Unity,JavaScript ,HTML5,CSS •Frameworks/Libraries .Net, ASP.NET Web API,EF,ADO.NET, Unity AR Foundation ⚡ NodeJS (Back-end) •Programming Languages/ Technologies:· JavaScript (ES5, ES6)· TypeScript· HTML5 •Frameworks/LibrariesGraphQLExpressAWS Lambdas •Bug Tracking/Project Management Software/CVS/Build Automation· Git· Jira· Trello •Others:· Agile, SCRUM· Unit Tests· AWS Lambdas· AWS Gateway· AWS S3· Postgres(Sequelize), MongoDB(Mongoose)· Swagger ⚡UX\UI Design •Investigation Phase Frameworks: Interaction Design, UX Research, User Story Mapping, In-depth interviews, Customer Journey Mapping, Wireframing, Prototyping, User Flows, Usability Testing, Generative and Evaluative research methods, Accessibility •Guidelines, Agile, Scrum, JTBD, Design Thinking •Tools: Miro, Figma, Sketch, Illustrator, InDesign, Photoshop, Invision, Zeplin, After Effects, Slack, Jira, Trello, ClickUp, Asana •Technologies: HTML5 /CSS3, Java Script ⚡QA •Bug Tracking/Project ManagementSoftware/CVS/Build Automation: Git, Jira, Trello •Others: Agile, SCRUM, OOP, Unit Tests, Swagger, Postman ⚡Back-End/Xamarin Developer Technologies: • Entity Framework Core • LINQ • ASP.NET Core • WPF • Xamarin.Forms • Xamarin.Android • Flutter Design Patterns: • Dependency Injection / IoC • Strategy Skills • Abstract Factory • Factory Method • State • Decorator • MVVM

Xamarin
PostgreSQL
Node.js
AngularJS
Angular 10
MongoDB
Angular
Websockets
PHP
Swift
.NET Framework
Python
Amazon Web Services
DevOps
React
Kotlin
Website Redesign
$40 hourly
- 4.8/5
- (15 jobs)
Computer Vision, Machine Learning and Unmanned vehicles dev: OpenCV, Tensorflow, Depth Cameras, Radars, Lidars, SLAM algorithms objects detection and recognition, tracking movements, determining coordinates in 3D, image segmentation, determining of size, recognition of color, voice. Apply neural networks and strong math algorithms, C++, Python, CUDA, Yolo V3, ROS, DNN, Qt, OpenGL, Kotlin, Swift, Xamarin. Software development for mobile platforms : Cross-platform Xamarin, С#, Phone Gap, Android & IOS App development Android application development: -------------------------------------------- • Android, Kotlin, Java, Objective-C Google APIs, Firebase, SQLite, Material Design, various design patterns. • Strong engineering professional with a Masters of Computer Science in I.T (M.Sc.I.T.) focused in Computer Engineering. • Features have experience with: Complex adaptive UI, Media: Camera, Video, Audio, BTLE (Bluetooth Low Energy, Bluetooth LE, BLE), JetPack, Push Notifications, In-App Purchase, Material design, SQLite, Room, Localisation, JSON, XML, REST APIs integration, Geo-fencing MVC, MVP, MVVM, Git/SVN (Github / Gitlab / Bitbucket), White Labels, Android Studio, Play store submission -------------------------------------------- Integrations to Firebase Facebook, Instagram, Google GoogleMaps, MapBox PushWoosh Paypal, Stripe, Braintree - In-app Billing integration - Social Media integration (Facebook, Twitter, Instagram, G+) - Client-server communication - Data caching on device - App notifications - GPS Stack: Language: Java / Kotlin Platform SDK: Android SDK / NDK Approaches: Clean Code, MVVM REST: Retrofit + OkHttp Database: SQLite ORMs: ContentProvider, Room Analysis: Crashlytics Version Control : Git, BitBucket,SVN • iOS (Objective C, Swift) -------------------------------------------- work as Native IOS Developer Swift 5 BTLE (Bluetooth Low Energy, Bluetooth LE, BLE) Storyboard CocoaPods Push Notifications In-App Purchase CocaTouch AutoLayout Core Location Localisation Geo-fencing JSON, XML MVC, MVP, MVVM Git (Github / Gitlab) Xcode REST APIs integration Apple TestFlight -------------------------------------------- We are Computer Vision R&D center of companies: * Inertiallabs . com (USA - Inertial Navigation Systems) * Darvis . com (USA/Germany - Healthcare) Worked with such types of depth cameras as: Kinekt v2; Intel realsense sr300; Intel realsense d 415 ; intel realsense d 435 ; ZED (Stereolabs); ZED mini (Stereolabs); Firmware development and experience to work with: Raspberry Pi Jetson Nano Jetson TX2 Jetson Xavier STM32 Intel Compute Stick Zotac Competencies: of our team Computer vision engineer / • C++, Python, OpenCV, CUDA, YOLO V3, Git, Linux, Qt, Boost, OpenGl, PCL, Strong math background Data Scientist / • C++, Python, MySQL, Statistical analysis Machine learning engineer/ • C++, Python, OpenCV, CUDA, Linux, Darknet, SegNet, TensorFow Backend Developer • C#, SQL, PostgreSQL, .Net Core, REST API, WebSockets • OCPP Protocol, Linux, Modbus, Raspberry Pi -------------------------------------------- Programming languages -------------------------------------------- • .Net Framework (C#, VB.Net, ASP.Net, .Net Core, WPF, UWP,WCF, ADO.Net) • Java (j2se, j2ee, servlets, java beans, Maven) • JavaScript (Node.JS, Express.js, Vue.js, Element.js, Angular.js, D3.js) • C++ (TCP/IP, HTTP, HTTPS, WebSocket, Modbus) • Python (MAVLink, WebSocket) • Step7 (S7 Communication, OCPP, Modbus, CANOpen, ProfiNet) Database -------------------------------------------- • PostgreSQL • MySQL • MongoDB • Microsoft SQL • Oracle Database • Neo4J Website development • PHP Joomla, WordPress • ASP.NET C#, MFC.

Xamarin
iOS Development
GPUImage
CUDA
Android
Kotlin
Artificial Intelligence
Swift
OpenCV
Machine Learning
Raspberry Pi
Python
Computer Vision
$40 hourly
- 4.9/5
- (10 jobs)
Hello there! I am working as a software developer in last 6 years on many different .NET projects. I do the vast majority of my work in C#. I believe C# is the best combination of performance, flexibility, and productivity. But no one software project is the same. I'll always take a deep look at the project requirements, and find the best tool for the job. To this end, I am proficient with the following tools and technologies: .NET, including C#, ASP.NET (MVC, Web Forms and SPA), Web API 2, Entity Framework, .NET Windows Forms, WPF, Xamarin Forms/Native, Angular, JavaScript, jQuery, Bootstrap,TypeScript etc. Anything SQL Server and T-SQL. Other databases like PostgreSQL,MySQL, SQLite, MS Access ASP.NET WebAPI WCF Web Services Crystal Reports, Active Reports Source controls, git, Github, BitBucket If you need to build specialized software, or perhaps even want to revamp an existing app you already have, please get in touch. I'd be more than happy to sit down with you, and workout a solution thats custom tailored to your needs. Quality and honesty are guaranteed. Thank you for reading my profile. I look forward to discussing with you on your current/next project.

Xamarin
Microsoft Azure
AWS Server Migration
JavaScript
.NET Framework
API
C#
SQL
ASP.NET Core
ASP.NET
$60 hourly
- 4.9/5
- (36 jobs)
Cheers! My name is Artyom, or as some call me - Arty, I am a C#, .NET Core back-end & full-stack developer and I truly love what I do! 11 years of experience in programming using all kinds of technologies, services, and tools: ⚂ C# ⚂ ASP.NET Core ⚂ ASP.NET MVC (from older to newer versions - legacy code to an up-to-date .NET Standard) ⚂ Angular (migrating, version update) ⚂ .NET Framework ⚂ Blazor ⚂ Desktop app development with WPF, WinForms, UWP ⚂ WCF ⚂ Entity Framework ⚂ Dapper & LINQ ⚂ MS SQL, Cosmos DB, PostgreSQL, MySQL, SQLite ⚂ SignalR ⚂ gRPC ⚂ REST API ⚂ CQRS ⚂ GraphQL ⚂ Google Maps API ⚂ ORMs ⚂ XAML ⚂ HTML5, CSS3 ⚂ JavaScript, TypeScript, AJAX ⚂ JSON Web Token ⚂ Quartz.Net ⚂ Twilio, SendGrid ⚂ Docker, DockerImage (Containerization) ⚂ GKE ⚂ Azure, Azure DevOps ⚂ Microsoft IIS ⚂ Stripe API, Square API, PayPal API Can write third-party APIs, work with and fine-tune, rewrite, and enhance the existing ones. Version control systems and software: Git, SVN, Bitbucket; Visual Studio, NuGet, LINQPad, XCode, and Android Studio for Xamarin.Native projects. I also have experience working with cross-platform mobile application development framework Xamarin, Xamarin.Forms and Xamarin.iOS/Android so creating enhanced, advanced, and robust mobile applications, fine-tuning them, bug-fixing is something that you can rely on me with. In-depth knowledge of various platforms, software systems, and servers. SaaS, PaaS, Progressive Web apps (PWA), and regular Web applications - been there, done that. Excellent communication skills with a strong background working directly with colleagues as a part of a team, and direct with clients all across the world. Working within Agile-enabled teams using Scrum, Kanban. Have had experience within LEAN-focused teams. Feel free to send your note to me - I will gladly get acquainted with you and get to know your project. I will help you to do the tech side, so you can focus on more important things, such as marketing, PR, socials, and fundraising. Best of luck!

Xamarin
Angular 2
Entity Framework
.NET Core
Angular
JavaScript
ASP.NET
TypeScript
ASP.NET MVC
C#
Microsoft SQL Server
ASP.NET Core
API
$50 hourly
- 5.0/5
- (9 jobs)
I am a Mobile Developer with solid background in Xamarin, .NET, and Android/iOS platforms. I have hands-on experience in development of cross-platform mobile applications for a number of industries from scratch to publishing in stores and support. With decent problem-solving skills and a technical background, I have successfully accomplished all phases of software development on numerous projects, and I am willing to move forward, broaden my practical experience and develop top-notch software solutions.

Xamarin
iOS
Android
$50 hourly
- 5.0/5
- (4 jobs)
Experienced C#/ASP.Net Core & MVC Developer with expertise in Angular, React, AWS, Azure, and SQL. I bring a strong background in web development, specializing in building robust and scalable applications using the C# programming language and the ASP.Net Core framework. Key Skills: • C# • Umbraco • ASP.Net Core • MVC • Angular • React • AWS • Microsoft Azure • Microsoft SQL Server Throughout my career, I have successfully developed and delivered projects using C#, ASP.Net Core, and MVC, leveraging their capabilities to create efficient and high-performing web applications. I have extensive experience working with frontend frameworks such as Angular and React, enabling the creation of dynamic and interactive user interfaces. Additionally, I have utilized AWS and Azure cloud platforms for deployment, scalability, and integration of applications. My expertise includes designing and implementing RESTful APIs, integrating with backend systems, and handling data manipulation and retrieval. I am well-versed in database technologies, including SQL, for effective data management and have experience working with various database systems. As a C#/ASP.Net Core & MVC Developer, I prioritize writing clean, maintainable code, following industry best practices and coding standards. I pay close attention to detail and ensure that my applications are secure, scalable, and optimized for performance. I excel in collaborative environments and have experience working within agile development methodologies. I possess effective communication skills and can successfully collaborate with cross-functional teams, including designers, testers, and project stakeholders. With my comprehensive knowledge of C#, ASP.Net Core, MVC, Angular, React, AWS, Microsoft Azure, and Microsoft SQL Server, I am well-equipped to tackle complex web development projects and deliver high-quality solutions. If you require further information or would like to discuss how my skills align with your specific needs, please feel free to reach out.

Xamarin
Umbraco
Ionic Framework
HTML
CSS
Angular
Entity Framework
Node.js
React
Laravel
Python
C#
Ruby on Rails
ASP.NET
$50 hourly
- 5.0/5
- (2 jobs)
✅ 9 years of overall programming experience. 🎓 Master's degree in Applied Mathematics. Specialized in: 💎 Web Development 💎 Mobile Development for iOS / Android / Cross-platform 💎 Desktop Development for Windows 💎 UI / UX Design 💎 VR & AR Development using Unreal Engine / Unity 3D

Xamarin
.NET Core
MongoDB
Azure
MySQL
JavaScript
jQuery
ASP.NET MVC
Java
C#
$40 hourly
- 4.8/5
- (5 jobs)
⚡️Tech-savvy Senior Software Developer proficient in SDLC including Full-stack development, DevOps, Cloud Management, System design, Release Management. Analytical and customer-focused Full-Stack Developer with 💥10 years of hands-on experience in software enginnering, designing, and implementation of hybrid mobile applications. ⚡️Being a Head of Development in Softwarenetic 🖥 gives me an opportunity to bring my expertise to even more people who are trying to find a solution for growing their businesses by improving their software products. ⚡️Our highly-qualified specialists aspire to exceed customers' expectations and are curious to efficiently assist you with: 📍Custom software development 📍Web Development 📍Web Application 📍Full-stack Development (Front-End & Back-End) 📍Mobile Development 📍Hybrid and Native mobile apps 📍Architecture design 📍IT consulting 📍DevOps 📍Established managed team ⚡️ Our area of expertise include: ☑️ JS & Front-End: ✓ React ✓ SPA & REST ✓ TypeScript ✓ HTML5/CSS3 ✓ SASS/LESS ☑️ Back-End: ✓ Node.js ✓ Nest.js ✓ Express.js ✓ .NET ✓ .NET CMS (Umbraco, Orchard etc) + Node.js CMS ✓ Python ☑️ C#. NET: ✓ ASP.NET MVC ✓ WEB API ✓ .NET Core ✓ Nhibernate/Entity Framework ☑️ Mobile: ✓ React Native ✓ Ionic ✓ Cordova ✓ Xamarin ☑️ Data Bases: ✓ SQL ✓ MongoDB ☑️ Others: ✓ Android, iOS ✓ OOD/TDD/DDD ✓ Design patterns ✓ Azure, AWS, Docker ✓ GIT/SVN/TFS/Mercurian 💡What's more, I held the position of CTO in a Californian startup and I'm skilled not only in the development and implementation of technical strategy, feature development and critical bug fixing, but in performance review, team leading, mentoring, documentation, incident management, etc.

Xamarin
HTML
Full-Stack Development
.NET Core
Web Development
ASP.NET MVC
Back-End Development
Front-End Development
iOS
Android
TypeScript
React Native
MongoDB
React
Mobile App Development
$40 hourly
- 5.0/5
- (2 jobs)
Hi. As a seasoned web and mobile developer with extensive experience, I offer my expertise in developing and designing modern websites and mobile applications from scratch to the end. I bring a unique prospective to my work. Thank you.

Xamarin
CMS Development
Google Cloud Platform
Flutter
React Native
Kotlin
Swift
Java
Ruby on Rails
Django
Laravel
Amazon Web Services
Vue.js
Angular
React
$40 hourly
- 4.9/5
- (43 jobs)
Seeking for a innovative, non-trivial projects. Back to freelancing. Hurry up to hire me until I am free ;) I am developing mobile apps using Xamarin/Flutter as well as back-end for those apps (ASP.NET Core).

Xamarin
iOS Development
Android App Development
Amazon Web Services
.NET Core
iOS
Android
Azure IoT HuB
Microsoft Azure
Entity Framework
Mobile App Development
ASP.NET Core
C#
Flutter
$255 hourly
- 4.9/5
- (144 jobs)
Top 1% Expert-Vetted with 26000+ hours & 16+ years commercial experience overall. High performing Upwork’s awards winning expert with eager to innovate by taking responsibility for the informed decisions. Have worked on dozens of complex solutions for such companies as Microsoft, Technicolor, Solvusoft, StatusIm and many others. Bring incomparably high business value with all round support for the project ( product analysis, development planning and implementation, research, etc ) or by solving sophisticated technical issues in the complex projects. Blockchain Consensus Protocol and ecosystem core, Smart Contracts, Proof of stake; Open Source software building, re-branding, and customization; WebRTC, ZoomSDK integration; Cross-platform Windows, macOS, Unix, iOS, Android solutions; CI/CD with Jenkins, Appveyor, Travis, Circle; Installers; UWP Windows 10 Store development; Certified medical EHR and EMR systems development; xTerm, WinPTY, ConPTY terminal emulators; Games development with Unity, Unreal Engine and custom engines; ● 26,000+ worked hours and 140+ projects completed PERSONALLY only at Upwork ● 2020 and 2018 years - awarded with "The Best Top Rated Freelancer Award in Ukraine (Web, Mobile, Software Category) at Upwork." ● Helped 100+ businesses to reach their goals in time ● Microsoft Certified Professional (MCP, 70-483: Programming in C#) I'm providing: - Projects consulting, estimation, application architecture design, and implementation ways foresees. - Code quality and performance review. Team leading and mentoring. - Proactive project management and technical leading to meet success criteria in the most efficient ways. - Tackling sophisticated technical issues (performance optimization, memory leaking, execution freezing). - Research and technical solution design. - Software development, bug fixing, features implementation. I'm experienced in the code development, software architecture design and projects management. I have worked on a wide range of desktop applications for Windows, OS X, and Linux. Participated in the massive commercial projects development with a team of up to 100 developers, developed numerous apps for desktop and mobile according to the clients' requirements. Therefore I'm capable to work in a group or build software myself from the ground. I prefer to keep work quality in the first place. Had a lot experience in cross-platform desktop development for Windows, OS X, and Linux using C++ / Qt / QML, mobile development for iOS, Android, and Windows Phone. I can create software solutions to support major operating systems from the single code base, develop installers and provide documentation. Technologies stacks: C++, STL, Qt, QML, WinAPI, MFC, ATL React, Redux, JavaScript, TypeScript Unity, Rewired, C#, PlayFab C#, Xamarin.Forms, .NET Framework, .NET Core, Entity Framework Core, WPF, UWP Universal Windows Platform, Windows 10 Objective-C, Cocoa, XCode, iOS Development, Cocos2d, Cocos2d-x NSIS, Advanced Installer, Installers development OOD, application architecture design Kinect development, Microsoft Kinect SDK, PrimeSensor Kinect SDK CMake, Appveyor, Travis CI, CircleCI, Jenkins React Native, ClojureScript, Reagent, Lein, Node.js, React, JavaScript GoLang, GLFW At StackOverflow community rated in TOP %5 for Qt skill and TOP %20 for C++ and QML skills. Please message me to get more details about my relevant experience or provide info about your needs! Always open and capable of learning quickly new frameworks and technologies used in your projects!

Xamarin
Consensus Protocol
CMake
React
Metal API
Blockchain
Unity
Golang
Qt Framework
Objective-C
C
Python
JavaScript
C++
C#
$60 hourly
- 5.0/5
- (15 jobs)
Welcome to my profile! I’m a web development expert with more than 10 years of experience in the field. I am keen on cutting-edge technologies and helping businesses achieve their objectives. But, as a technical expert, I also embed my unique approach to working with clients: Solid requirements analysis and elicitation - Offering at least a couple of project scope realization options - Visualization of the possible technical strategy in a format of an architecture scheme - Preparation of the Technical Vision Recently I’ve been involved in a bunch of .NET, Xamarin, and architecture-aimed researches as a part of my core expertise to stay in touch with new technological insights and keep my professional expertise up to the industry best practices. Besides these, here is a list of bells and whistles I can also provide: Technologies: - Languages: C# - Frameworks: WPF, UWP (Universal App), ASP.NET Core, ASP.NET MVC - Databases: Microsoft SQL Server, SQLite, PostgreSQL, SQL Compact IoC (AutoFac, TinyIoc, NInject, Unity); AutoMapper, Swagger - Tools: Microsoft Visual Studio, ReSharper, dotTrace, dotMemory, dotCover, JetBrains Rider, DataGrip - Deployment: WebDeploy, Octopus, Docker, TeamCity - Testing: xUnit, nUnit, Microsoft built-in - Platforms: Azure, AWS, private servers, VDS - VCS: Git, TFS - Audio/video calls: WebRTC - Web servers: IIS, Kestrel, self-hosted Domains: - Retail - Construction and Real Estate - Aviation, Tourism, Travel - Entertainment and Social networking - Marketing and Advertising - Fintech - Insurance - Industrial - HoReCa - Mental health and Healthcare - Management Project types: - ERP, CRM, POS - Complex web systems - Web application - Website - Desktop application - Standalone module, Framework, SDK - Proof of Concept I’m open to both consultancy and development opportunities. Feel free to get in touch with me and my team if you want to discuss a desktop, web application or multi-component web platform concept, I am sure I will have valuable and interesting ideas to share with you!

Xamarin
Windows Presentation Foundation
.NET Stack
Microsoft Azure
ERP Software
Microsoft HoloLens
.NET Core
Desktop Application
Microsoft Windows
C#
Hybrid App Development
Augmented Reality
Unity
$56 hourly
- 5.0/5
- (65 jobs)
Cross-platform mobile apps development for iOS and Android on Xamarin/MAUI. Web/Backend/API development on Angular and .NET 5.

Xamarin
.NET Core
Microsoft Azure
ASP.NET Web API
ASP.NET Core
ASP.NET
Universal Windows Platform
Android App Development
iOS Development
XAML
$45 hourly
- 5.0/5
- (67 jobs)
𝗜 𝗵𝗮𝘃𝗲 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 𝗶𝗻: 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗔𝘇𝘂𝗿𝗲, 𝗔𝗦𝗣.𝗡𝗘𝗧, 𝗢𝗽𝗲𝗻𝗔𝗜/𝗖𝗵𝗮𝘁𝗚𝗣𝗧 (𝗟𝗮𝗻𝗴𝗖𝗵𝗮𝗶𝗻 & 𝗦𝗲𝗺𝗮𝗻𝘁𝗶𝗰 𝗞𝗲𝗿𝗻𝗲𝗹), 𝗕𝗹𝗮𝘇𝗼𝗿, 𝗠𝟯𝟲𝟱 𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀, 𝗠𝗶𝗰𝗿𝗼𝘀𝗼𝗳𝘁 𝗧𝗲𝗮𝗺𝘀, 𝗕𝗼𝘁𝘀, 𝗖𝗼𝗴𝗻𝗶𝘁𝗶𝘃𝗲 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀, 𝗮𝗻𝗱 𝗫𝗮𝗺𝗮𝗿𝗶𝗻/𝗠𝗔𝗨𝗜. ⚡ Total .NET experience: 15+ years. ⚡ I have built many successful projects: AI, cloud, mobile apps, and chatbots for SMBs and enterprises. ⚡ I am a former Microsoft MVP for Windows and ASP.NET Development. 🌐 Location: Kyiv, Ukraine. 𝗖𝗲𝗿𝘁𝗶𝗳𝗶𝗰𝗮𝘁𝗶𝗼𝗻𝘀: 🥇 Microsoft Certified: Azure Solutions Architect Expert 🥇 Microsoft Certified: Azure Developer Associate 🥇 Microsoft Certified: DevOps Engineer Expert 🥇 Microsoft Certified: Azure Administrator Associate 🥇 Microsoft Certified: Azure Cosmos DB Developer Specialty 🥇 Udemy: Hybrid Leadership: Essential skills to lead from anywhere 🥇 MCSD: App Builder 🥇 credly.com/users/mykhailo-galushko 🥇 learn.microsoft.com/en-gb/users/mykhailogalushko-3662/transcript/1drjf169qjn3qgv 𝙍𝙚𝙘𝙚𝙣𝙩 𝙊𝙥𝙚𝙣𝘼𝙄/𝘾𝙝𝙖𝙩𝙂𝙋𝙏 𝙘𝙖𝙨𝙚𝙨: • Support chatbot: url.devrain.com/r/chatty-presentation (using Azure OpenAI, Azure Cognitive Search, SemanticKernel, and MS Bot Framework) • Chat with company knowledge base: devrain.fibery.io/DevRain/Chat-with-company-knowledge-base-169?sharing-key=9b6d4e53-b794-4fe0-923e-70cd22c72e63 • Automated processing of legal documents for GDPR compliance: devrain.fibery.io/DevRain/Automated-processing-of-legal-documents-for-GDPR-compliance-162?sharing-key=59f42d9d-c821-45a1-890a-82285f513fd4 • Intelligent Assistant for Revenue Management platform: devrain.fibery.io/DevRain/Intelligent-Assistant-for-Revenue-Management-platform-155?sharing-key=2544efff-3656-4413-b2f2-d7f731574309 More OpenAI-powered cases: devrain.fibery.io/DevRain/DevRain-OpenAI-ChatGPT-case-studies-157?sharing-key=5571a04f-881f-440a-a4ee-e21cf20ec6ab 𝙍𝙚𝙘𝙚𝙣𝙩 .𝙉𝙀𝙏 𝙘𝙖𝙨𝙚𝙨: • Digital Workplace platform for enterprise: devrain.fibery.io/DevRain/Digital-Workplace-for-enterprise-with-Microsoft-Teams-143?sharing-key=9893fa6b-b3c1-4085-9d2b-64530358d341 • Knowledge base on Microsoft SharePoint with enhanced search and machine learning capabilities for enterprise: devrain.fibery.io/DevRain/Knowledge-base-on-Microsoft-SharePoint-with-enhanced-search-and-machine-learning-capabilities-for-en-154?sharing-key=1019e84b-15ea-4efa-a415-cffd547d30d4 • eCommerce SaaS CRM platform with mPOS system is used by small & medium Swiss trading companies: devrain.fibery.io/DevRain/eCommerce-SaaS-CRM-platform-with-mPOS-system-is-used-by-small-medium-Swiss-trading-companies-156?sharing-key=22b47f3f-db76-4f50-b2fc-bfadcdcd429c • Intelligent Assistant for Revenue Management platform(SaaS): devrain.fibery.io/DevRain/Intelligent-Assistant-for-Revenue-Management-platform-155?sharing-key=2544efff-3656-4413-b2f2-d7f731574309 • Platform for competency management for enterprise: devrain.fibery.io/DevRain/Platform-for-competency-management-for-enterprise-165?sharing-key=73a6cfdf-6a55-4433-894e-7451ccb663d3 More .NET cases: devrain.fibery.io/DevRain/DevRain-platforms-with-.NET-case-studies-142?sharing-key=ce664b6d-b1ce-48a2-863c-e95c7ed53cfa

Xamarin
Azure OpenAI Service
Microsoft Bot Framework
ChatGPT
ASP.NET Core
.NET Framework
API
Microsoft Azure
Blazor
Web Development
Android App Development
C#
iOS Development
API Integration
React
$50 hourly
- 4.6/5
- (14 jobs)
I use next paradigms and practices to deliver high-quality source code: Functional Programming, SOLID principles in Object-Oriented Programming and Test-Driven Development approach. In Desktop Software, I have developed complex stochastic simulation related to reliability field. Earlier, I have worked on 3D/2D games for PC and Mobile platforms for 5 years. In perspective, I want to evolve in scientific and artificial intelligence fields. I have experience with such Frameworks, Libraries and Tools: • WPF: Caliburn.Micro, PRISM, MahApps.Metro • Mobile: Xamarin, Windows Phone • GameDev: MonoGame, XNA, Direct3D • 3D-Graphics: Shaders, GPGPU • Statistics: Math.NET, ExcelPackage, EPPlus • Reliability: Petri.Nets, Maintainability, Genetic Algorithm

Xamarin
Microsoft SQL Server
Statistics
Visualization
Test-Driven Development
Functional Programming
.NET Framework
Windows Presentation Foundation
SQL
C++
C#
F#
$60 hourly
- 5.0/5
- (24 jobs)
More than 8+ years of experience in software development. The main focus is on cross-platform mobile games and application development. The main technologies are Xamarin and Unity3D using C# and Flutter (using Dart). However, I have also experience with native mobile development with Java and Swift. Other technologies that I worked with: - Speech recognition services; - Mobile accessories, such as heart-rate trackers; - Virtual/Augmented Reality.

Xamarin
Dart
Flutter
Java
Android
iOS
iOS Development
Game Development
Unity
C#
Mobile App Development
Smartphone
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