Top Upwork Freelancers

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  1. Muhammad Rehan Abbasi

    Muhammad Rehan Abbasi

    Free Lance Application Developer

    Pakistan - Last active: 13 hours ago - Tests: 4 - Portfolio: 4

    I am Software Developer by profession carrying an Engineering Degree in Computer Software. I am very determined and eager to prove my skills and competencies. I carry a good experience of over 3 years in software application development using a wide variety of tools. My core competencies include C#, C++, Java, ExtJs and Java Script programming languages. I am also quite comfortable with database tools & technologies such as SQL Server, MySQL and Oracle.

    $7.78 /hr
    469 hours
    4.92
  2. Stepan Govorko

    Stepan Govorko

    Expert C# Developer

    Russia - Last active: 13 hours ago - Tests: 1 - Portfolio: 7

    I`m always paying a great attention to a code and architecture quality, bugs-free and stability of applications. My goal is to participate in an interesting large-scale project and to establish a long-time collaboration with customer. Summary: • Skilled IT graduate with 7+ years of software development experience, particularly within Microsoft development environment using C# • 4+ years real world working experience in WPF, Silverlight, XAML, Prism • 3+ years experience on Windows Communication Foundation (WCF) and SOA • 2+ years experience creating .NET Web Applications • Experience in working with Design Patterns & Practices • Experience in developing n-tier applications • Experience in developing high-load asynchronous applications • Experience in developing data access layers using Entity Framework • Experience in working with GIS (ArcGIS) • Good Experience with third party components like Telerik, DevExpress, yFiles • Knowledge of creating Unit Test plans and scenarios • Great experience in working with large hierarchical graph model

    $22.22 /hr
    391 hours
    5.00
  3. Michael Ravits

    Michael Ravits

    Full-Stack Software Engineer

    Israel - Last active: 2 days ago - Tests: 2 - Portfolio: 1

    I am a Full Stack Developer with over 9 years of experience in the industry, working both on Web as well as native applications. While I excel at working with a team, having experienced managing a remote group of developers, I am also capable of single-handedly delivering projects from start to finish. With my skills and experience, I always strive to produce clean, robust and highly tested code for every project. Having a very broad experience with numerous tools/languages and technologies, I specialize in building modern web applications and high-scale data processing pipelines. My language of choice is Clojure. Some of the technologies I've worked with in recent projects: - Server side development on the JVM * Clojure * Cassandra * ElasticSearch * Java * Kafka * Redis * Samza * Spark * Storm - Large and small client side applications in ClojureScript * Om * Reagent * ReactJS As a technology enthusiast I enjoy utilizing these cutting-edge tools to deliver projects quickly and efficiently.

    $79.77 /hr
    845 hours
    5.00
  4. Arturo Mejia

    Arturo Mejia

    Expert Android Developer

    Dominican Republic - Last active: 1 day ago - Tests: 10 - Portfolio: 8

    I am a proactive person with solid experience in software mobile development, dedicated to providing strong and quality technology solutions. ★Native Android Development. ★Native iOS Development. Lover of technology, challenges and the knowledge. I'll be glad to help you :) For more info please check my portfolio and my Linked in Profile-> https://www.linkedin.com/in/arturomejiamarmol Experiences: Process of publishing/updating apps on play store Process of publishing/approval/updating apps on ITunes store

    $10.00 /hr
    52 hours
    5.00
  5. Julian Astrada

    Julian Astrada

    Software Engineer / iOS Developer

    Argentina - Last active: 2 days ago - Tests: 3

    Hi! I'm a developer with 6+ years of experience, the last 3 years I have been focused on mobile applications. My favorite technology is native iOS which is what I am currently doing. I have worked with iOS native applications using both Objective-C and Swift, my most recent applications had WatchKit support and had strong content built into the Apple Watch. I have also worked on Android and non-native applications using Titanium and Phonegap. LinkedIn where you can check my endorsements: ar.linkedin.com/in/jastrada Skills: iOS Development, Objective-C, Swift, Titanium Mobile, Java, JavaScript, Object Oriented Design, Service-Oriented Computing (SOAP & REST), Mobile Design, etc.

    $16.00 /hr
    36 hours
    5.00
  6. Maciej Dolinski

    Maciej Dolinski

    Excel power user

    Poland - Last active: 1 day ago - Tests: 2 - Portfolio: 1

    A seasoned telecom and ICT engineer with over 25 years of experience in Microsoft Excel spreadsheets design and data manipulation. If you need a spreadsheet, a dashboard or to have your data analyzed, I am the right choice. Native Polish, speaks English fluently, can easily discuss in Czech and Slovak. Well experienced in English<->Polish technical texts translations and manuals creation. Located in Warsaw, Poland, but well accustomed to work remotely with contacts over Skype.

    $12.50 /hr
    127 hours
    4.93
  7. Dmitry Sytchev

    Dmitry Sytchev

    Asterisk/Freeswitch/Kamalio expert, VoIP engineer, Linux administrator

    Russia - Last active: 1 month ago - Tests: 7 - Portfolio: 1

    I have more than 10 years of experience in installation and support of carrier-grade VoIP services based on Asterisk, OpenSIPS, Kamailio, Freeswitch and proprietary SIP/VoIP software. My professional interests are Callcenters, automated dialer systems and integration of VoIP software with company information flows. You can rely on my strong engineering and programming skills for projects starting from single VoIP server to a complete wholesale/carrier VoIP solutions including billing, call data analysis, security and fraud prevention. I have developed complete SIP solutions for VoIP carriers worldwide: Proxy/Registrars, IVR, prepaid systems, multi-tenant VoIP switches, hardware PSTN gateways (Cisco AS5300/5500, Audiocodes Mediant 2000, Quintum Tenor). I have experience in setup, administration and security of Asterisk, FreePBX, Elastix and FreeSWITCH PBX installations. As a programmer I use PHP, Javascript (both client-side using jQuery and Angular.js and server-side with node.js), Perl (system scripts/applications, Mojolicious webapps). I also have experience in development and administration of MySQL and Microsoft SQL Server databases. I'm experienced network engineer, skilled in routing and switching, general network architecture planning and deployment, network monitoring and security, including HA solutions (heartbeat/pacemaker). I use Zabbix and have some experience with Nagios and other monitoring software. I can also offer you consulting support in VoIP and network technologies.

    $33.33 /hr
    93 hours
    4.96
  8. Krastyo K.

    Krastyo K.

    Java/SQL/C++/C# Developer

    Bulgaria - Last active: 1 day ago - Tests: 2

    I have more than 15 years experience of Web and Desktop programming, using variety of technologies - web programming using Java or ASP.NET, JQuery, Ajax, HTML, CSS; SQL databases; different tools, services and applications with C++/C#. During my work carrier I have been involved in many projects, focused in various fields of interests - database driven web sites and applications, Windows desktop applications, CAD/CAM systems, MS-Office automation applications, device control systems, large database support applications.

    $20.00 /hr
    1,344 hours
    5.00
  9. Maksim S.

    Maksim S.

    Software Developer & Architect

    Russia - Last active: 3 days ago - Tests: 6

    Hello, I'm strong C/C++/C#/Java/Javascript Windows, Android and Web Developer with 20 years of experience. Full cycle software development: analysis, design, implementation, testing, maintenance and support. I've built quite a bit of systems in the past from the ground up to success. I'll be glad to do the same for you. Regards, Max. PS: I'm several math olympiad winner both is school and university. Quick learner. These are areas I've been working with: Areas client side: Any Web (ASP.NET, ASP.NET MVC), WPF, Any Win32 (barebones, WTL, MFC), Win32 call hooking Android including NDK. Regular javascript and jQuery, Angular.js, Moustache.js Areas server side: ASP.NET, Java Spring, TSQL, node.js etc Most important is that I like other areas such as: Visual recognition, Data mining, Machine learning, Discrete process acquiring etc

    $30.00 /hr
    179 hours
    5.00
  10. Aleksandr Kondrik

    Aleksandr Kondrik

    Senior iOS Developer

    Russia - Last active: 13 hours ago - Tests: 5 - Portfolio: 8

    Hello, With 3+ year of experience in I get expertise in iOS and .Net development. I love develop apps. I like complex and diverse assignments that keep my mind sharp and allow me to constantly learn new things. Have some apps in AppStore: 1) iDrom - mobile client for site www.drom.ru 2) Autoservice 717 - business application for car service

    $33.33 /hr
    255 hours
    5.00