Top Upwork Freelancers

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  1. Konstantin S.

    Konstantin S. Agency Contractor

    bug free software development, fine art and illustration

    United States - Tests: 7 - Portfolio: 5

    I am a software design engineer with extensive experience in design and implementation of desktop and web applications. During my career I have worked with many different technologies, both proprietary and open source. Most importantly, I know how to write code that has a solid theoretical foundation. If your project requires high quality, "bullet-proof" code, I can help you. I am also a fine artist and I would be very much interested to get involved in to an illustration project or a computer animation project, in particular, HTML5 canvas animation. If you would like to hire me for a fixed-price job, please make the job hourly and set the job's limit on hours to be equivalent to the value of your fixed price.

    Associated with: k design

    $66.67 /hr
    2,368 hours
    4.99
  2. Andrey K.

    Andrey K. Agency Contractor

    Pro iOS Developer

    Russia - Tests: 2 - Portfolio: 5

    More than 5 years experience in native iOS applications development using latest Apple technologies, great number of successfully completed projects including my own apps. Experience in big and complex projects for well known customers. Ability to work as a part of a big team or alone. Key knowledges: Software Architect, Design Patterns, iOS SDK, xCode, Team-Leading, Multithreaded Application Development, MVC. SWIFT: Largest experience and understanding of the modern Apple programming-language: closures, functions, optionals, structs, enums, control flow, pattern matching, data modelling, GCD, extensions Apple xCode 3-6: "Instruments" for testing: leaks, allocations, CoreData tool, Time profiler, Performance tool, Zombies, File Activity etc. C/OBJECTIVE-C: Strong Objective-C skills, modern style (GCD, ARC, blocks programming, object literals etc.). Apple’s code documentation: UI & AppStore guidelines, iOS 7 UI/UX guidelines. Memory Management, protocols, categories etc. COCOA/COCOA TOUCH FRAMEWORKS: UIKit, Foundation, CoreGraphics, CoreAnimation, CoreImage, CoreLocation, CoreMotion, AVFoundation, GameKit, MapKit, Social, CoreData, StoreKit, QuartzCore, Accounts, AudioToolbox, SDWebImage, AddressBookUI, CoreMedia, CoreVideo, MessageUI, CoreText, EventKit, SpriteKit, CloudKit and others. DATABASES: SQLite (mobile, powered by CoreData.framework), Data Modeling, Multithreaded DB management. I have the strong iOS development skills with more than 5 years experience and a large number of completed and published projects including my own products. I know how to create any custom iOS applications from the beginning till the AppStore release. KEY SKILLS: - ability to start and finish any project (have a lot of my own AppStore projects) - build easily supported, workable and stable project architecture - make UX the most user-friendly and unlocked with multithreading - pixel perfect Interface Building works - Data Modeling and DataBase management in multithreaded environment - ability to apply any kind of iOS animation  I love to produce a great products for people.

    Associated with: KickApps

    $26.66 /hr
    100 hours
    5.00
  3. Rhys Leo Coronado

    Rhys Leo Coronado Agency Contractor

    Mobile App Development Specialist

    Philippines - Tests: 2 - Portfolio: 1

    Rhys is considered as a Jack of all Trades, Master of Mobile App Development. Yes! You heard that right. He specializes in Mobile Apps using Titanium Appcelerator to build for Android & iOS but that didn't stop him from also learning Web stuff and Project Management using SCRUM, not to mention that he's proficient with Photoshop and some design tools but he's not much of a Designer at heart. What separates him from the rest is he don't have that "just build" mentality. He always does his very best by contributing to the team solutions that would make the quality of the project better. He considers User Experience as an integral part of his work which is a quality of a rare developer. Lately he's been involved with pure native Android Development and had spearheaded numerous projects at his young age. He's now looking into learning native iOS development using SWIFT.

    Associated with: APPetite

    $16.67 /hr
    83 hours
    5.00
  4. Roman G.

    Roman G. Agency Contractor

    Senior android developer

    Ukraine - Tests: 10 - Portfolio: 5

    My name is Roman. Currently I’m a Senior Android developer in Yalantis. I’m developing applications in a huge variety of spheres (social, scientific, augmented reality, internal company applications, media, ndk, etc.). I have an experience building server side app (using Java EE, & NodeJS) as well as websites. I have extensive experience in development for wearable devices such as Google Glass and Android Wear I have strong experience working with: - Media (audio & video processing) - NDK (c++ NDK development) - Custom views & animations - Chats (using socket.io & xmpp protocol) - Augmented reality (OpenCV) - Rich UI interface - Payments (paypal, stripe, braintree) - Camera (video/photo capturing, effects) - BLE (iBeacon devices) Feel free to request a quote for your project :-)

    Associated with: GlassTeam x70

    $40.00 /hr
    272 hours
    5.00
  5. Hien Nguyen Ngoc

    Hien Nguyen Ngoc Agency Contractor

    iOS Expert

    Vietnam - Tests: 1 - Portfolio: 8

    I am a creative and talented mobile developer who has been living in mobile world for 5 years. If you work with me, you would get a good adviser as well as a skilled developer. Since I have rich experience in mobile development, I can bring your idea to life successfully. For client's satisfaction, I will bend over backwards. My skill summary is as followings. iOS6/iOS7/iOS8, Flash/Flex, PHP, Drupal. - Parse - Cocos2d, cocos2dx for Game development. - Social, Geo-location, Camera application. - Backend based application. - Json, RSS, XML, AJAX, Forsquare, SOAP API - Facebook, Twitter , Instagram, Google plus, Youtube - Emoji App, New Emoticons adds - Barcode, QR code scanning related apps - Racing, Fighting, Quiz, Trivia games. - MySQL SERVER, SQLite, HTML5, PHP, JSP, javascript

    Associated with: H3Q

    $22.22 /hr
    331 hours
    5.00
  6. Dmitry F.

    Dmitry F. Agency Contractor

    iOS (including Apple Watch), Android, Windows Phone expert

    Russia - Tests: 8 - Portfolio: 21

    Tachyon Labs, Ltd. is a outsourcing company based in Novosibirsk, Russia. Our team consists of experts with many years of experience in mobile development and design for mobile platforms. Our goal is to develop unique applications for our clients just in time and for the best price. In addition, we always care about the quality of our projects. All of our products are made with love and hight attention to detail. That is why most of our clients become constant partners. We produce the most rigorous selection of our team of graduates of the best universities of Novosibirsk, our employees have specialized education in mathematics and information technology, have at least a Bachelor's degree and are able to solve any non-standard tasks. We provide the following services: - iOS application development: our team consists of experts in the field of developing applications for Apple's mobile devices, they perfectly know Objective-C and the most commonly used frameworks; - Developing applications for Android: our developers are able to create any application for phones, and tablets running Android. We use Java and Android SDK, as well as C/C++ if an application requires the use of native code; - Developing applications for Windows Phone: if you need an application for OS from Microsoft our C++ and C# developers for your services. Our highly experienced developers perfectly know all aspects of design and development for Windows Phone, including the application publishing in the Marketplace; - Web development: highly experienced PHP and Python developers ready to develop any Web services and CMS for your mobile applications, and we can always help you with configuring your server and the deployment on it; - Design: our team consists of designers with years of experience in the design of mobile applications (with strong UX) and graphics for games (2D and 3D graphics); - Porting applications: we are always ready to port an application from one platform to another; - Quality control: our QA team carefully examines all the applications developed by our company to provide you with the most stable product. We have been working on various applications: - Reference apps; - News apps; - Sports applications; - Educational apps for children; - Applications for the online stores; - Application to search for restaurants and order food; - Mobile clients for social networks; - A variety of exciting games for all age groups; - And many other types of applications. We work with the most modern technologies, our employees are always exploring new technologies and improving their knowledge, being experts in the following areas: - Platforms: iOS, Android, Windows 8, Windows Phone, MacOS X, Web; - Programming languages: C, C++, Objective-C, Java, PHP, Python, Javascript, C#, LUA; - iOS: Objective-C, MapKit, UIKit, StoreKit, GameCenter, In-App Purchases, integration with social networks, Client-Server, JSON, XML, image processing, Cocos2D, CoreGraphics, CoreAnimation, CodeData, OpenGL ES 1.1/2.0, iAd, AVFoundation and more; - Android: Java, Google Maps, AdMob, Android Billing, integration with social networks, Client-Server, JSON, XML, OpenGL ES 1.1/2.0 and much more; - Web: PHP, Python, MySQL, CodeIgniter, Symfony 2, Apache, XML-RPC, XML, JSON and more. Payment Terms For small projects (up to $ 1000), we prefer the following scheme of payment: 50% upfront and 50% on completion of the project. For larger projects we develop a plan that includes a 10-15% upfront, as well as several milestones with the exact schedule and list of functionalities to be ready at the milestone completion. And of course we are always open for discussions and are ready to offer the most convenient and advantageous for you conditions.

    Associated with: Tachyon Labs, Ltd

    $50.00 /hr
    87 hours
    5.00
  7. Angeloluca B.

    Angeloluca B. Agency Contractor

    Google Apps Script / Node.js / Javascript Development

    Italy - Tests: 3 - Portfolio: 6

    I like to understand, question and solve problems. I especially focus on building integration and automation tools, whatever can help people and systems to collaborate and behave smartly. I especially focus on Javascript, Node.js, Google Apps Script flexibility and Google App Engine powerful capabilities, but Python and Java are good friends too. I have developed a wide range of dashboard, automation and mining tools for startup companies and businesses exploiting the smartness and power of these tools. I built an extensive experience in data mining, recovery and automated analysis for business intelligence and bioinformatics. (2 years) - Cloud Development & Web Collaboration : Google Apps Script , Javascript, Node.js, Google Clous Products - Software Development : C/C++, JAVA, C#, PHP - Data Mining : Excel, Extraction & Recovery,Database MySQL/Oracle PHP/PERL/Python for scripting and Web Applications(3 years) JAVA/C# enterprise development for Web Services, SOA and Integration (4 year of practice) C++ distributed and network software development (3 year of practice) C++ network management development (2 year of practice) C++ system programming and low-level coding (2 year of practice)

    Groups: Crossrider

    Associated with: Web HQ

    $50.00 /hr
    702 hours
    4.98
  8. Alex Momotyuk

    Alex Momotyuk Agency Contractor

    Senior Android Developer

    Belarus - Tests: 1 - Portfolio: 2

    I am an android mobile developer with 3+ years' experience. Last time I focused on developing full stack mobile projects for Android. I have a wide range of experiences in software development using Java, C++. I am able to provide full life cycle of software engineering right from requirements gathering, design (if needed), prototype, development, testing, publishing and maintenance. I am an highly effective and reliable person able to meet the job requirements and agreed deadlines. In mid and long-term projects I like to follow TDD, version control, code reviews and other good agile practices to provide excellent results in time and build continuous and productive communication.

    Associated with: Panda Systems

    $25.00 /hr
    509 hours
    5.00
  9. Yavor I.

    Yavor I. Agency Contractor

    Android/Wear/Tizen/Backend developer

    Bulgaria - Tests: 2 - Portfolio: 17

    Over the last 5 years I have developed a wide range of applications for Android based smartphones and tablets. Most of my clients are companies from the small business but also I've worked for Samsung, Shutterstock and British Telecom. I'm seeking opportunities to build applications from the ground up for you or your business. I have strong experience in these areas : Java, Android, Google App Engine, Backend and API development, Google Cloud Datastore, Tizen SDK, Database (Oracle, MySql and Sqlite), Ruby and HTML5/CSS3. I'm mainly interested in mobile apps development but I'm able to handle cross-client development including backend/API and web application. Example 1) Android app + Google App Engine(Backend) + Google Cloud Endpoints(API) Example 2) Example 1 + Google Cloud Messaging Example 3) Example 2 + Google Cloud Datastore Example 4) Example 1 or Example 2 or Example 3 + Web app (html/css/javascript) Example 5) Any of the examples above + Wear/Tizen app Example 6) Any of the examples above + UI An UI can be provided by one of the few very skilled designer I'm working with. It will be Android compatible by using the Material Design principles. * Please, only serious clients with vision for great, long-term projects! Not interested in part-time jobs. Strong communication is required!

    Associated with: Dision

    $32.22 /hr
    2,184 hours
    4.83
  10. Roman Yerin

    Roman Yerin Agency Contractor

    Web and VoIP(FreeSWITCH, WebRTC) engineer

    Russia - Tests: 4 - Portfolio: 2

    I'm a skilled software developer and VoIP engineer with more than 15 years of experience. I'm also a full-stack developer of the convergent systems of voip and web. Playing with Freeswitch, Kazoo, SipXecs, Ruby, Perl, JS(node.js), C/C++ and much, much more - I'm always choosing tools for the task. Probably the most important thing which differs me from others - I'm never working just to gain money. I'm always doing my best to reach your goal the fastest way possible. If you've chosen a non-optimal solution I'll correct it and suggest a more efficient way. I'm never promising something that you're probably expecting to hear instead of the realistic estimate of your project. I'm never lying to my clients and I'm always giving all the information I have - transparently and on a regular basis. In one word - you can trust me as you trust yourself.

    Associated with: Coderunes

    $45.00 /hr
    552 hours
    4.82